The complete beginner’s guide to Bitcoin wallets
What will you learn in this guide? Everything you need to know, including what a Bitcoin wallet is, how to get it, and what to watch out for. Here’s a complete table of contents:
- What is a Bitcoin wallet?
- What is a private key?
- HD Wallets
- Choosing your wallet
- Types of wallets
- Backing up your wallet
- Handling transaction fees
- What to watch out for
Not in the mood to read? Check out our video about wallets
A Bitcoin wallet is a program for sending and receiving bitcoins. A Bitcoin wallet does that by interacting with Bitcoin’s ledger, known as the blockchain. Bitcoin wallet programs are available for mobile phones, desktops, and even as a standalone piece of hardware (more on that later on).
Generally speaking, Bitcoin wallets are a bit similar to how email works. If you want to send and receive emails, you need some sort of a program to do so (e.g., Gmail, Outlook). Like emails, receiving Bitcoins requires a unique personal address. This unique address is called your Bitcoin address, and—just like your email address—you can share it with anyone who wants to send you bitcoins.
Bitcoin address example: 1BoatSLRHtKNngkdXEeobR76b53LETtpyT
(Bitcoin addresses always start with a “1” or “3”)
The final ingredient that’s missing is your password. With email, you choose your own password, while with Bitcoin, the wallet chooses it randomly for you. This password is called your private key and—similar to your email password—it should never be shared with anyone.
A private key is just a very long string of numbers and letters that acts as the password to your bitcoins. It’s from this secret combination that your wallet derives the capability to tell the Bitcoin network you want to send your Bitcoins to another destination. The most important thing to remember is this: Whoever knows your private key has control over your bitcoins.
The private key is also used to generate your Bitcoin address. The process would look like this:
- You download a wallet program to your mobile phone or laptop.
- The program (also known as the client) randomly creates a private key.
- A Bitcoin address is created by running some sort of mathematical algorithm on your private key.
Even though the Bitcoin address is generated from the private key, there’s no way to figure out what the private key is just by examining a Bitcoin address. This is a one-way process.
A wallet’s core function is the creation, storage, and use of the private key. In other words, it automates Bitcoin’s complex cryptography and blockchain interactions for you. You could argue that the program itself isn’t that important—the only thing that matters is the private key.
For example, if you have a Bitcoin wallet on your phone and that phone gets stolen, but you’ve written down your private key on a piece of paper before that happened, you could just download a new Bitcoin wallet to a different phone, import the private key to that new wallet, and regain control of your bitcoins again.
As Bitcoin wallets evolved, HD wallets (aka hierarchical deterministic wallets) were created. HD wallets generate a phrase known as a seed or mnemonic phrase. This seed is a set of common words that you can memorize instead of the long and confusing private key. As you can imagine, it’s much easier to create a backup of 12 simple words than a long, confusing string of numbers and letters.
an example of a seed phrase from an Electrum wallet
Additionally, an HD wallet can create many Bitcoin addresses from the same seed, so you don’t have just one Bitcoin address. All the transactions sent to addresses created by the same seed will be part of the same wallet.
Different people use different Bitcoin wallets for different purposes. For example, if I need to store a large amount of Bitcoin safely, I will use a different wallet than if I just want to have some small Bitcoin change to pay for a cup of coffee.
Usually, wallets vary on the scale of security versus convenience, and you need to decide where you want to be on that scale. Some of the questions you should ask yourself include:
- How many bitcoins will I be storing?
- How frequently will I use the wallet?
- Can I afford to pay for a wallet?
- Will I be storing additional coins other than Bitcoin?
- Do I need to carry the wallet around with me?
- Do I need to share the wallet with someone else?
- Am I tech savvy?
- How much do I value my privacy?
- Do I trust myself to safeguard my wallet, or do I want to give a third party the task of doing so?
Depending on the answers to these questions, it should be easier for you to choose a wallet. Most popular Bitcoin wallets are listed on the top of this page, so now it’s just a matter of choosing the best wallet for your needs.
You may want to use more than one wallet. For example, you can use a hardware wallet for large sums of bitcoins and a mobile wallet with a small balance on it for daily payments. This way, even if your mobile phone breaks or gets stolen, you’re not risking a lot of money.
Below is a detailed description of the different types of wallets you can find and which wallet is best suited for what purpose.
5.1. Cold storage: The most secure way to hold Bitcoins
Cold storage (or cold wallets) refers to any type of wallet that is detached from an Internet connection and therefore cannot be hacked remotely. Some examples of cold storage wallets are hardware wallets, paper wallets, and brain wallets.
Hardware wallets are physical devices that safely store private keys. They usually come in the form of a flash drive that can connect to your computer in order to interact with them.
Different types of hardware wallets
Hardware wallets are built to protect your private key even if the device they are connected to is compromised by malware. You can even use them with a public computer you don’t trust. To send your bitcoins to someone using a hardware wallet, you’ll need to have your hardware wallet connected to a computer and to use some sort of web page that allows control over the wallet.
Hardware wallets offer the optimal mix between security and ease of use. Their only limitation is that you need to keep your hardware wallet on you at all times in order to send the coins.
The best hardware wallets available today
Paper wallets are just pieces of paper with a private key or seed written on them. When you keep your private key on a piece of paper, only someone who can physically access that paper can steal your bitcoins. However, paper wallets are easily destroyed, and it’s advisable to create multiple copies so that if one is lost, your bitcoins can still be retrieved.
An example of a Bitcoin paper wallet
Another thing to consider is that to send the bitcoins you have on a paper wallet, you will have to import the private key into some form of digital Bitcoin wallet. Here’s an example of how it’s done:
5.2 Hot wallets: The most convenient way to store Bitcoin
A hot wallet refers to any form of Bitcoin wallet that is connected in some way to the Internet. This can be a wallet that is connected to a web service, a wallet installed on a computer connected to the Internet, or even a wallet installed on your mobile phone, assuming you have an active data connection to and from your phone.
Hot wallets, while being the most popular type of wallet, are also the least secure because they allow access to their inner workings through Internet connections.
These wallets store your private key on your mobile phone. I actually consider these wallets to be the least secure of all wallets. As phones are frequently lost, broken, or stolen, it’s strongly advised that you enable two-factor authentication, password-protect your wallet, and create a private key backup.
Mobile wallets are highly convenient and are designed to provide as much security as possible in an insecure environment. Nonetheless, substantial sums should not be stored on a mobile wallet unless it’s being used in tandem with a hardware wallet, which we’ll discuss in a minute.
The best mobile wallets available today
Desktop, Android, iOS
BTC, BCH, ETH
Web, iOS, Android
Desktop, iOS, Android, Web
Desktop, iOS, Android, Web
Adjustable, Segwit, RBF
iOS, Android, Web
Adjustable, Segwit, RBF
These type of hot wallets store your private key on your computer. As long as your computer is free of malware or any security weaknesses, your Bitcoins are safe. However, we all know that’s not the case for most of us. Today it’s hard to be 100% protected and this makes desktop wallets that are connected to the Internet a valuable target for hackers.
The best desktop wallets available today
Desktop, Android, iOS
Desktop, iOS, Android, Web
Desktop, iOS, Android, Web
Adjustable, Segwit, RBF
Markets, exchanges, betting sites, and other Bitcoin services frequently require you to deposit funds into their online hot wallets in order to conduct your business. These web wallets are the least secure option for storing bitcoins because the operators own the private key to the bitcoins stored on their site. You’re basically asking someone else to hold your coins for you.
Web wallets are also more vulnerable to hackers since they have many possible loopholes along the way. For example, the website in question, the device you’re using to connect to the website, or the Internet connection can be monitored to steal your bitcoins.
On the other hand, web wallets are highly convenient, as they allow you to buy, sell, and send bitcoins at a moment’s notice.
More competent web wallet services will provide two-factor authentication options, such as validating every account login with a text message, to guard against external hackers. Even so, for storing any significant amount of coins, web wallets are not worth the risk. We advise that you avoid the #1 newbie mistake and never keep your bitcoins in a web wallet.
6. Additional types of wallets
Multisig stands for multisignature, a wallet that allows sending bitcoins, only with the approval of enough private keys, out of a set of predefined keys. Let me explain:
To clarify, let’s say that Alice, Bob, and Charlie all want to open a business together and invest some of their Bitcoins, but none of them actually wants only one person to have the private keys to the money. So they each get one key and use a multisig wallet that requires two out of three of those keys. This way, none of them can run away with the money alone, but they also don’t need all three of them to pay expenses.
For example, if Alice wants to run away with the money, she can’t because she only has one key. But if Bob is missing and Alice and Charlie want to pay an expense, they can do it with their two keys.
Multisig doesn’t have to be only two out of three—it can be almost any combination. For example, a couple wants a shared account and decides that they can spend the money only if both of them agree; or a Company’s board of directors allows payments only by vote of a majority.
Multisig is often used for escrow services, in which two parties decide on a transaction that requires two out of three keys. If the seller and buyer don’t agree, a trusted third party will arbitrate and release the funds.
Some wallets, often referred to as full nodes, hold a full copy of the blockchain in order to validate each and every transaction. Unlike full nodes, SPV (simplified payment verification) wallets (aka lite or thin wallets) don’t hold a full copy of the blockchain. SPV wallets rely on the full nodes to which they are connected in order to validate transactions.
SPV wallets are faster and consume less disk space than their counterparts. Since the blockchain today is becoming increasingly big, many wallets offer an SPV solution for limited-capacity devices such as mobile phones, tablets, and desktops.
Brain wallets are just a way to create a private key out of a predetermined text or set of words. So instead of getting a randomly generated seed or private key, you can decide for yourself on a passphrase and use some basic algorithms to generate a private key from that passphrase. Here’s a short video explanation:
However, brain wallets have a significant disadvantage by having a higher probability of being hacked. This is because people are usually very predictable in what they use as passwords or supposedly random text, and hackers have a way of knowing that.
To prove this point, some tests have been done where simple passwords have been used for brain wallets and deposited with funds. The results? The funds have been quickly stolen. Additionally, one Bitcoin user lost four bitcoins from his wallet after using a brain wallet private key generated from an unknown Afrikaans poem.
This proves that even if you think you’ve found an obscure text for a passphrase, you’re still in danger of being hacked.
Now you know about all of the wallet types that are out there. Bear in mind that some wallets will fulfill more than one criteria. For example, you can have a mobile SPV wallet that also has a multisig feature.
Because private keys and seed phrases have complete power over your Bitcoins they must be kept secret and safe. If you fail to protect your wallet’s private key or seed, the bitcoins it controls could be irretrievably lost.
A standard Bitcoin wallet (i.e., not HD) will create a wallet.dat file containing its private key. This file should be backed up by copying it to a safe location, such as an encrypted drive on your computer, an external flash drive, or even a piece of paper that’s hidden away.
An HD wallet, on the other hand, will supply you with a seed phrase with 12–24 words that you should write down in a safe place. One interesting product people often use for backing up their wallets is the Cryptosteel, an indestructible metal plate that has your private key on it. You can see some test I ran on it below:
Each Bitcoin transaction is attached to a transaction fee. This fee is included in order to incentivize Bitcoin miners to include the transaction in the next block of transactions. The larger the size of your transaction (more on that here), the higher the fee you’ll need to pay in order to get confirmed in the next block.
Some transactions aren’t as time sensitive as others. For example, if I’m just moving funds from my desktop wallet to my hardware wallet for safekeeping, I don’t really care if it takes the transaction even two days to get confirmed. That’s why I can allow myself to use a lower fee. However, if I’m sending payment for a service or a product I purchased, I might want to use a higher fee so the transaction is confirmed faster.
Fees are also highly dependant on the amount of transactions waiting to be confirmed. Since if a lot of people want to confirm their transactions, they will start bidding up the attached fees. Therefore, a fee that was considered high yesterday might be considered low today.
That’s why one of the features a wallet has relates to fee handling. Here are the main ones you need to be aware of, since not all wallets support these features:
Segwit support: Segwit is an upgrade issued to the Bitcoin protocol, which—among other things—allows you to shrink your transaction file size (hence reducing your required fee). Segwit addresses will start with a “3” instead of a “1.”
Replace by Fee (RBF): If your transaction can’t get confirmed because you didn’t pay a high enough fee, you can easily bump the fee via the RBF option. Your wallet will then automatically rebroadcast the transaction with a fee raised to your required level.
9.1 Apps that steal Bitcoin
Hackers will sometimes introduce a new wallet to the app store (or Google Play) with the intent of stealing user funds. There’s no way to know a wallet isn’t malicious other than by actually reviewing its code, and that’s not a feasible option for most of us.
In order to stay on the safe side, it’s always recommended to only download wallets that have accumulated a strong reputation in the Bitcoin community. Don’t just download an app or wallet because a friend referred you; do your own research, ask around on forums, and read review sites. The wallets listed on this page have all been around for at least two years and have gained good reputations from the Bitcoin community.
9.2 Hardware wallet tampering
Hardware wallets should only be bought from the manufacturer or an authorized reseller. Having said that, most reputable hardware wallets have a built-in mechanism that will alert you if your device has been tampered with.
They also should come sealed with a holographic sticker showing that the device has never been opened. One thing to keep in mind is that the seed phrase for the hardware wallet should be generated by the device itself and not by the manufacturer. This is done so that only you will know the seed phrase to your device. Not too long ago, a user reported that he’d received a Ledger wallet with a sheet of paper that already had a 24-word seed phrase on it. Once he uploaded funds to the wallet, they were stolen, as the seller knew his seed phrase.
If you have any more questions, feel free to leave them in the comment section below.
The following section features summarized reviews of the most popular Bitcoin wallets around. For each wallet, you can view the main pros and cons, visit the wallet’s website, or read our extensive review.
Ledger Bitcoin wallet review
Summary: Much like TREZOR, Ledger is a cold wallet designed for users who want increased security. The wallet is actually a physical device that connects to your computer and acts as another source of protection—meaning you can’t send bitcoins from your wallet without owning the physical device. If you’re looking for a cold wallet (e.g., Ledger or TREZOR), I’ve compared the two in this post.
Ledger offers a variety of products, such as Ledger Nano S and Ledger Unplugged (a contactless Bitcoin wallet). The most popular model today is the Ledger Nano S.
Pros: Beginner friendly, very secure, great support
Cons: Costs money, more security = less usability (this is an issue with all cold wallets)Visit Ledger’s website Read our Ledger review
TREZOR Bitcoin wallet review
Summary: TREZOR is the perfect solution for storing a large amount of bitcoins in order to keep them out of harm’s way. The combination of world-class security with the flexibility of any other web wallet makes it ideal for beginners and experts alike. The company has been gaining a nice amount of traction and reviews throughout the last year. For a full review of TREZOR, click here.
Pros: Extremely secure wallet, easy to use and intuitive interface, supports additional wallets and altcoins
Cons: High price tag relative to its competitorsVisit TREZOR’s website Read our TREZOR review
Coinbase Bitcoin wallet review
Update: In the past, we used to list Coinbase as a wallet, but due to changes in the company’s vision, this is no longer a recommended wallet.
Summary: Coinbase is the leading exchange service today in buying and selling bitcoins. It was founded in 2012 and since then has received over $31 million in venture capital funding. The Bitcoin exchange service is available in 19 countries around the world. Its online wallet is beginner-friendly, but the fact that the company holds your funds can be somewhat risky. Having said that, Coinbase has recently launched its Vault service, which denies the company control over your funds.
Pros: Beginner friendly, ability to add funds from within the wallet, established and respectable company
Cons: Company has some control over your funds (depends if you’re using Vault), not supported worldwide (yet)Visit Coinbase’s website Read our Coinbase review
Blockchain.info Bitcoin wallet review
Summary: The most popular Bitcoin wallet today, Blockchain.info allows you to send and receive bitcoins through your browser or mobile phone. This is what’s known as a hybrid wallet, meaning the company stores your wallet online but does not have access to your private keys. However, since the wallet is loaded from their servers, some trust in the company is still needed. Recommended for beginners who are trying out Bitcoin.
Pros: An established and trusted company in the Bitcoin community, good interface, available for mobile and web
Cons: Third-party trust required, hard to make completely anonymous paymentsVisit Blockchain.info’s website Review coming soon!
Exodus Blockchain assets wallet review
Exodus is a relatively new wallet (launched July 2016) that allows you to store not only bitcoins but also litecoins, dogecoins, dash, and ether. It’s unique in its beautiful design and intuitive user interface. You can also trade cryptocurrencies from within the wallet. Currently, the wallet is available only in a desktop version. Here’s a full review of Exodus.
Pros: Easy to use, allows the trading of cryptos from within the interface, self-hosted, awesome support from the founders
Cons: Limited only to desktop at the moment, relatively new companyVisit the Exodus website Read our Exodus review
Jaxx Bitcoin and Altcoin wallet review
Jaxx is an all-platform Bitcoin and Altcoin wallet that allows you to store cryptocurrencies and also exchange between different currencies from within the wallet (via the ShapeShift exchange). The wallet is extremely intuitive and is self-hosted, so you don’t trust your private keys to any third party.
Pros: Easy to use, allows you to trade cryptos from within the interface, self-hosted, awesome support, works on multiple platforms
Cons: Relatively new company, there have been some issues reported for Linux usersVisit Jaxx’s website Read our Jaxx review
Mycelium Bitcoin wallet review
Mycelium is a popular mobile app wallet that features a wealth of advanced privacy and security features. Yes, the wallet can be a bit complicated for new users, but it’s still one of the safest and fastest on the market. As an open-source software program, Mycelium is constantly being upgraded. While Mycelium is primarily a hot wallet, there are some cold storage features for Bitcoin users looking to put their wealth on ice.
Pros: Advanced privacy features make this app great for people looking to stay anonymous, advanced security features will help keep your Bitcoin wealth secure
Cons: No web or desktop interface, so you’ll have to use your smart phone to access this app; Mycelium is also better for more advanced users, so keep that in mind.Visit Mycelium’s website Review coming soon!
KeepKey Bitcoin wallet review
Summary: KeepKey is one of the newest players in the Bitcoin market. It has a very sleek and unique design, which makes it probably the best looking physical Bitcoin wallet out there. The device itself is very intuitive and easy to set up. You can read a full KeepKey review here.
Pros: Beginner friendly, great design, simple to use, secure
Cons: Costs money ($99), relatively new companyVisit Keepkey’s website Read our KeepKey review
Bitcoin Core wallet review (Bitcoin QT)
Looking for a desktop solution for your Bitcoin wallet? If so, Bitcoin Core (also known as Bitcoin QT) is worth considering. Bitcoin Core offers a lot of security and privacy features, and it supports complete transparency. Bitcoin Core is well regarded for being a stable system, though it can use up a lot of memory and space on your computer. Still, for modern computers, the hardware requirements are rather low.
Pros: Features plenty of security and privacy features and offers a highly stable system
Cons: No mobile app and no web interface make it difficult to use this wallet without having your own personal computer on hand; requires a lot of free space to store the whole BlockchainVisit Bitcoin QT’s website Bitcoin Core review coming soon! se
Electrum Bitcoin wallet review
This fast, lightweight desktop app is a good choice for someone using older and less powerful computers for their Bitcoin storage. The most processor-intensive parts of the wallet are handled by remote servers. Electrum is well regarded for its advanced security and privacy features, and users can even recover their wallet with a secret passphrase, though some people would prefer a wallet that doesn’t rely on remote servers.
Pros: While many apps are processor intensive, Electrum is known for being fast and lightweight
Cons: Not friendly for newbies, and the reliance on external servers could present security threatsVisit Electrum’s website Read our Electrum review
Armory Bitcoin wallet review
Amory is a well-known and trusted brand when it comes to Bitcoin security, though the app is best for more advanced users. If you’re looking for an app that emphasizes safety and security, Armory should make the short list as an app features a variety of encryption and cold storage options. Armory is among the most respected brands when it comes to Bitcoin security.
Pros: Very flexible and adaptable to just about any situation, offers industry-leading security features
Cons: Requires advanced user knowledge and is not known for being user-friendlyVisit Armory’s website Armory review coming soon!
Xapo Bitcoin wallet review
Xapo is a web-based wallet system, so all you need to access it is a web browser and an Internet connection. Xapo is known for having reasonably advanced privacy and security features, especially for a web-based wallet. The company supports payments through a debit card system, making it easy to spend your bitcoins. The app is also friendly to newbies, so if you’re new to Bitcoin, give Xapo a closer look.
Pros: Xapo debit card system allows you to use Bitcoin ATMs and spend at merchants across the world.
Cons: Web-based wallets face extra security threats, and you won’t be able to manage your bitcoins without an Internet connection.Visit Xapo’s website Xapo review coming soon!
Green Address Bitcoin wallet review
A user favorite, Green Address allows you to access your bitcoins through a variety of methods, including online, through a mobile app, or through a desktop client. Better yet, Green Address is well regarded as being user-friendly. This makes Green Address one of the most flexible wallets around. It supports multisignature features and has strong security and privacy features.
Pros: Very flexible and very easy to use, making Green Address a top choice for newbies
Cons: Requires the use of a remote app loaded from another location, and shared control over your Bitcoins (meaning the third-party has to approve payments).Visit Green Address’s website Read our GreenAddress review
Bitcoin Wallet review
One of the oldest names in the business, Bitcoin Wallet is known for being fast and relatively easy to use. The company believes in “zero trust,” meaning they go out of their way to provide a decentralized system that provides people with a lot of control over their Bitcoin wealth. High transparency along with strong security features make this a very secure program, especially for a web-based wallet.
Pros: A well-reputed brand name and a safe, fast, and secure operating environment make this wallet a good choice, though newbies may need a bit of time to get a hang of the system.
Cons: Only available online, requires an Android or Blackberry phoneVisit Bitcoin Wallet’s website Bitcoin Wallet review coming soon!
BitGo Bitcoin wallet review
BitGo is known for its high levels of security and is a multisignature wallet. This means that every transaction will require two-factor identification, which can go a long way in protecting your wealth from malware, hackers, and server attacks. Oh—and these keys are held by users, not BitGo, so they have no easy access to your stash.
Pros: A high level of security in a relatively easy and non-technical package
Cons: Two-factor identification can create a hassle, and the service does rely on central verification.Visit Bitgo’s website Bitgo review coming soon!
Airbitz Bitcoin wallet review
Summary: Airbitz is a decentralized, secured, and backed-up Bitcoin wallet. The promising notion about it is that neither Airbitz nor any other third party can access your bitcoins, so it’s fully independent. The nice thing about Airbitz is that it also supplies you with a directory of Bitcoin-accepting businesses around you. It also seems that a lot of thought was put into the user interface to make the experience of using Airbitz as simple as possible.
Pros: Beginner friendly, Bitcoin-accepting business directory, decentralized
Cons: Unestablished brand, no web interface (mobile only)Visit Airbitz’s website Airbitz review coming soon!
Copay Bitcoin wallet review
Summary: One of the best Bitcoin wallets out there, it was created by Bitpay. Copay is a multisig wallet, which means that a single wallet can have multiple users. This can be ideal for a corporate account, where—for example—two out of three signatures are required in order to confirm a transaction. The wallet also has a desktop, mobile, and web interface and is completely independent and open source. You can read our full review of Copay here.
Pros: Multisig wallet (allows for improved security), great design, supports multiple devices
Cons: No support, can be a bit overwhelming for beginnersVisit Copay’s website Copay review coming soon!
CoolWallet Bitcoin wallet review
Summary: CoolWallet is another attempt at creating a portable Bitcoin hardware wallet. The device itself looks and feels like a credit card and has one small operation button on it. The device needs to be held closely to your mobile app when sending out coins, adding another layer of security. Even though the concept is pretty cool, the execution is far from complete, and the device still feels a bit clunky. Click here to read our full CoolWallet review.
Pros: Very portable (fits in your wallet)
Cons: Device feels a bit clunky, relatively new company behind the productVisit Coolwallet’s website Read our Coolwallet review
BTC.com Bitcoin wallet review
Summary: BTC.com is a Block Explorer owned by Bitmain. The site offers several tools such as network statistics, a mining pool, and an online wallet. The wallet, similar to Blockchain.info, is an HD hybrid wallet. You access it via the web, but the keys to the wallet are stored on your machine, so BTC.com has no access to them.
Transactions are signed on your device so no one can see your private keys. The wallet also supplies multisig capabilities and is open source.
Pros: Wide variety of features, intuitive interface, open source
Cons: Still a hot wallet, controlled by Bitmain, which has a shaky reputation in the communityVisit BTC.com’s website BTC.com review coming soon!
Coinomi Bitcoin wallet review
Summary: Coinomi is a mobile wallet currently available only for Android. The wallet holds Bitcoin and a variety of additional cryptocurrencies (up to 287 currencies supported). The wallet is pretty basic and user friendly. The main issue with this wallet is that it started out as an open-source wallet, but since 2016, it’s become closed source—something that has raised a lot of eyebrows in the Bitcoin community.
Pros: Wide variety of coins supported, intuitive interface
Cons: Closed source, Android onlyVisit Coinomi’s website Read our Coinomi review