Best BUILDon (B) wallet app for real use
B · Multichain networkLooking for a BUILDon wallet or a B wallet app that does more than just hold? Zypto App is a non-custodial multichain DeFi wallet where you can hold B on the Multichain network, swap into 24,000+ assets, connect to dApps, top up the Zypto Premium Visa Card, pay bills and buy gift cards. All from one app, with your keys staying on your device.
Why Zypto is the best BUILDon (B) wallet for everyday use
Most BUILDon wallets do one thing: hold B. Zypto App is a full DeFi wallet built for actually using it. Hold B non-custodially on the Multichain 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 BUILDon wallet app or your first B 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.
BUILDon wallet for beginners and the best B wallet app
New to BUILDon? You don't need an exchange account to get a wallet. Download Zypto App, generate your recovery phrase, and you have a working B wallet in under a minute. Add your first B by receiving from another wallet, or by buying in-app where supported.
From zero to using BUILDon
Get the app
Download Zypto App on iOS or Android. Generate your recovery phrase. Your keys stay on your device.
Add B
Receive B 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.
How safe is your BUILDon in Zypto App?
Zypto App is non-custodial. Your private keys are generated and stored on your device. Zypto never has access to your B, and every transaction is signed locally. For higher security, pair with the Vault Key Card, the card-based cold-wallet hardware that signs transactions over NFC without exposing keys to the internet.
What is BUILDon?
BUILDon, traded as B, is a community and ecosystem token associated with the Base blockchain. It launched in 2025 and is positioned around rewarding on-chain activity and participation within the Base ecosystem. The token has a large community following and has been used in various Base-native applications and campaigns. Its design reflects the trend of ecosystem tokens that aim to tie users into a specific chain's activity and growth. As a newer community token, its trajectory will follow the growth of the Base chain and the strength of its surrounding community. You can track the BUILDon price and hold B in a self-custody wallet.
What you can do with BUILDon in Zypto
Every feature works directly with your B balance. No selling, no exchange roundtrips.
Use a Crypto Visa Card
Top up the Zypto Premium Visa Card with B and use it wherever Visa is accepted. Physical or virtual.
Crypto cardsPay bills with BUILDon
Settle utility bills and mobile contracts with billers worldwide, paid from your B balance.
Bill payBuy gift cards with B
Gift cards from popular brands, paid in BUILDon. Settle in-app, redeem instantly.
Gift cardsTop up any phone
Send mobile credit across many countries in seconds. Pay with B, recipient gets local airtime.
Mobile top-upsCross-chain swaps
Swap BUILDon into 24,000+ assets across 20+ chains. No bridges, no second wallet, all in one tap.
Multichain walletVault Key Card cold storage
Card-based cold-wallet hardware. NFC-tap to sign BUILDon transactions, keys never touch the internet.
Vault Key CardPay via KuCoin Pay
Move and pay with B across the KuCoin Pay network, straight from your non-custodial Zypto wallet.
KuCoin PayHold any of these alongside BUILDon
Cross-chain swaps mean your B can become any of these in two taps.
662+ dedicated wallet pages
BUILDon wallet FAQs
What's the best BUILDon wallet app?
That depends on what you want to do with your B. If you're holding only, any non-custodial wallet works. If you also want to use BUILDon for real-world spending through the Zypto Premium Visa Card, pay bills, top up phones, or swap into other assets, Zypto App is purpose-built for that while still being fully non-custodial.
Is the Zypto BUILDon wallet non-custodial?
Yes. Your private keys are generated and stored on your device. Zypto never has access to your B. Every transaction is signed locally on your device before it reaches the network.
Can I use BUILDon for real-world spending without selling it?
Through the Zypto Premium Visa Card, your B balance is converted at the point of sale, so you use the value of your crypto for real-world spending wherever Visa is accepted, subject to eligibility and applicable limits. You can also swap B into stablecoins in-app for bill pay or gift cards.
Which chains can I swap BUILDon into?
20+ chains including Ethereum, Solana, Polygon, Arbitrum, Optimism, BNB Chain and TRON. Cross-chain swaps happen inside the Zypto App, no separate wallets required.
How do I back up my BUILDon wallet?
During setup, Zypto App generates a 12-word recovery phrase. Write it down and store it offline somewhere safe. For higher 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) are region-restricted. Check the support center for your country's specific availability.
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.