Download the Tangem app
from the App Store or Google Play Store
How to buy Build4
- Non-custodial
- Private keys are yours
- +1M users
- 4.7 on App Store
Buy Build4 quickly on your phone without an exchange or signup. Tangem is a free, non-custodial wallet for iOS and Android. Buy Build4 with Apple Pay, Google Pay, Venmo, PayPal, or cards
How to buy Build4 right now?
The fastest way to buy Build4 is directly inside the Tangem app, without opening an account
Create your Build4 wallet
You own the keys; No one can access the private keys
Buy Build4 instantly
You can use Apple Pay, Google Pay, Credit cards or Bank transfers
Why buying Build4 in a non-custodial wallet is safer
When you buy Build4 on an exchange, the exchange holds your funds. If the exchange is hacked, freezes withdrawals, or goes bankrupt, your Build4 is at risk. Tangem ensures that doesn't happen to you. When you buy Build4, our integrated provider sends it directly to your wallet's public address.
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Own your money
Your private keys are generated and stored inside the Secure Enclave (iOS) or StrongBox (Android), a dedicated security chip on your device that handles all cryptographic operations
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Secure your assets
The Tangem app has been independently audited by third-party researchers e.g Cure53
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Start in minutes
You can upgrade your asset security by backing your wallet up with the Tangem card or ring. They use an EAL6+ certified secure element for cold storage
What you can do with Build4 in Tangem
Send Build4 to any wallet address
Move Build4 across Ethereum, Tron, BNB Chain and more — no KYC, no middlemen
Cold storage in your pocket. Tap to secure. Tap to spend.
Private keys never leave the card's secure chip — no exposure, no online risk
Swap Build4 for other assets directly in the app
Compare rates from DEXs and CEXs automatically — no external account needed
Earn with it by connecting to dApps and DeFi protocols
Access yield on Aave and other protocols without handing over your keys
Fees and limits when buying Build4
Completely zero fees to hold or send Build4 in Tangem
0.5-1%
On-ramp fee
Charged by the payment provider processing your purchase
Rates and minimums vary by provider and region, and are displayed clearly in-app before checkout
$0.10-0.25
Network fee
Paid to Build4 miners or validators to process your transaction
This varies with network congestion and is shown before you confirm
Limits depend on your region and the payment provider. Tangem works with multiple on-ramp partners so you can compare options before buying.
Buying Build4 with Tangem
Here we've answered some of the most common questions we received
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No. Tangem lets you buy Build4 directly in the app using Apple Pay, Google Pay, and more payment options. You never need to create an exchange account or go through a separate verification process to get started.
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No. Tangem is fully self-custodial. Your Build4 is stored on the secure chip inside your Tangem card, and only you hold the private keys. Tangem never has access to your funds.
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Most purchases complete within a few minutes. Once the payment is approved by the provider, your Build4 is delivered straight to your Tangem Wallet.
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Your Build4 is stored on your Tangem card, not on your phone. Simply install the Tangem app on your new device and tap your card to regain full access to your wallet.
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Your Tangem Wallet already is cold storage. The private keys for your Build4 are generated and kept on the card's secure element and never leave it.
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KYC requirements depend on the payment provider and the amount you're purchasing. For small purchases of Build4, many providers allow you to buy without verification.
Want maximum security? Upgrade to cold storage
The Tangem app gives you a secure, non-custodial wallet that most people will never need to go beyond
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The Tangem app gives you a secure, non-custodial wallet. If you are holding a significant amount of Build4 and want your keys offline and safe, Tangem wallets are built for that
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Pair a card with the app, and your wallet migrates to a secure EAL6+ certified element. You manage everything through the Tangem app and your keys live on the hardware
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Tangem is a Swiss-based company and has been building self-custody wallets since 2017. Our products have been independently audited, certified, and reviewed by security researchers and major crypto media