Hold BOB (Build on Bitcoin) (BOB) in a wallet you control
BOB · BOB networkLooking for a BOB (Build on Bitcoin) wallet or a BOB wallet app that does more than just hold? Zypto App is a non-custodial multichain DeFi wallet where you can hold BOB, swap into 24,000+ assets across 20+ chains, connect to dApps and put your crypto to work in the real world. All from one app, your keys on your device.
BOB (Build on Bitcoin) runs on the BOB network, which isn't integrated in the Zypto App yet. Request BOB on X and we'll prioritize adding it so you can hold and swap BOB (Build on Bitcoin).
Request BOB in Zypto App
Why Zypto is the best BOB (Build on Bitcoin) (BOB) wallet for everyday use
Most BOB (Build on Bitcoin) wallets do one thing: hold BOB. Zypto App is a full DeFi wallet built for actually using it. Hold BOB non-custodially on the BOB network, swap into 24,000+ assets across 20+ chains via in-app DEX integrations, connect to dApps with WalletConnect, and use the value through the Zypto Premium Visa Card and Zypto's bill-pay and gift-card surfaces.
Whether you're new and looking for your first BOB (Build on Bitcoin) wallet app or your first BOB wallet, or an experienced DeFi user who wants one wallet for holding, swapping and real-world spending, Zypto is built for both, without sacrificing self-custody.
BOB (Build on Bitcoin) wallet for beginners and the best BOB wallet app
New to BOB (Build on Bitcoin)? You don't need an exchange account to get a wallet. Download Zypto App, generate your recovery phrase, and you have a working BOB wallet in under a minute. Add your first BOB by receiving from another wallet, or by buying in-app where supported.
From zero to using BOB (Build on Bitcoin)
Get the app
Download Zypto App on iOS or Android. Generate your recovery phrase. Your keys stay on your device.
Add BOB
Receive BOB from another wallet, or buy in-app where supported.
Use it everywhere
Top up the Zypto Premium Visa Card, swap into other assets, pay bills, or buy gift cards.
Your BOB (Build on Bitcoin) is secured by you
Zypto App is non-custodial. Your private keys are generated and stored on your device, Zypto never has access to your BOB and every transaction is signed locally. For account access, every user sets a PIN with optional biometric security (fingerprint or face recognition). You can also filter your wallet to show only verified tokens, protecting you from random airdrops or unsafe assets. For offline hardware wallet security, pair with the Vault Key Card, card-based cold-wallet hardware that signs transactions over NFC, keys never touch the internet.
What is BOB (Build on Bitcoin)?
BOB, short for Build on Bitcoin, is a hybrid Layer 2 network that aims to bring decentralized finance to Bitcoin while keeping Ethereum tooling. It is built on the OP Stack and is EVM compatible, so developers can write standard smart contracts and applications. Its mainnet went live in 2024, and BOB joined Optimism's Superchain later that year as a member of that group of OP Stack chains. The project's goal is to let people put Bitcoin to work in DeFi without giving up custody to a centralized intermediary. It uses a BitVM based design for bridging BTC, and a later phase adds Bitcoin staking to provide finality. The BOB token arrived in late 2025 through a token generation event. It is issued on the BOB network with a fixed supply, and it is used for governance, staking, and network utility. As a newer chain still rolling out parts of its roadmap, BOB is best understood as an evolving project rather than a settled one. You can track the BOB price and keep BOB in a self-custody wallet that you control.
What you can do with BOB (Build on Bitcoin) in Zypto
Zypto App connects your BOB (Build on Bitcoin) to real-world spending. Swap into supported coins in-app, use your BOB (Build on Bitcoin) in the real world.
Vault Key Card cold storage
Card-based cold-wallet hardware. NFC-tap to sign BOB (Build on Bitcoin) transactions, keys never touch the internet.
Vault Key CardUse a Crypto Visa Card
Load the Zypto Premium Visa Card with crypto. Physical and virtual cards, use them wherever Visa is accepted.
Crypto cardsPay bills with BOB (Build on Bitcoin)
Settle utility bills and mobile contracts with billers worldwide, paid with crypto from your Zypto wallet.
Bill payBuy gift cards with BOB
Gift cards from popular brands, paid with crypto. Settle in-app, redeem instantly.
Gift cardsTop up any phone
Send mobile credit across many countries in seconds. Pay with crypto, recipient gets local airtime.
Mobile top-upsCross-chain swaps
Swap BOB (Build on Bitcoin) into 24,000+ assets across 1,000,000+ cross-chain routes. All in-app, all in two taps.
Multichain walletPay with crypto
Zypto App supports 100+ cryptocurrencies for card loads, mobile top-ups, bill pay and gift cards. Swap any asset into a supported coin in-app, all in a few taps.
Zypto PayHold any of these alongside BOB (Build on Bitcoin)
Cross-chain swaps mean your BOB can become any of these in two taps.
662+ dedicated wallet pages
BOB (Build on Bitcoin) wallet FAQs
What's the best BOB (Build on Bitcoin) wallet app?
That depends on what you want to do with your BOB. If you're holding only, any non-custodial wallet works. If you want to hold, swap across 20+ chains, connect to dApps, and use crypto for real-world spending, Zypto App is purpose-built for that while still being fully non-custodial.
Is the Zypto BOB (Build on Bitcoin) wallet non-custodial?
Yes. Your private keys are generated and stored on your device. Zypto never has access to your BOB. Every transaction is signed locally on your device before it reaches the network.
How do I spend crypto with Zypto Premium Visa Cards?
When you load the card in Zypto App, your crypto is converted into USD. Conversion happens at load, not at the checkout, so you can lock value in, avoid volatility and spend wherever Visa is accepted around the world, subject to eligibility and applicable limits.
Which chains can I swap BOB (Build on Bitcoin) into?
Swap into assets across 20+ chains including Ethereum, Solana, Polygon, Arbitrum, Optimism, BNB Chain and TRON, across 1,000,000+ cross-chain routes. All in-app, all in two taps.
How do I back up my BOB (Build on Bitcoin) wallet?
During setup, Zypto App generates a 12-word recovery phrase. Write it down and store it offline somewhere safe. For offline hardware wallet security, pair Zypto App with a Vault Key Card, the card-based cold-wallet hardware that signs transactions over NFC without exposing your keys to the internet.
Is Zypto App available in my country?
The wallet itself is available globally on iOS, Android and web. Some features (in-app buying, the Zypto Premium Visa Card) vary by region. See what's available where you are on our <a href="/spend-crypto/">Spend by Country</a> page.
Is Zypto App free?
The app is free to download and use. Standard network fees apply to on-chain transactions. Card and bill-pay services carry transparent transaction fees published in the app.
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