Skip to content
Coinomi

Build4 wallet.

Hold, send and receive Build4 in a wallet where you hold the keys.

Download Coinomi
Get it oniPhoneAndroidMacWindowsLinux

What you can do with Build4 in Coinomi

Hold, send and receive Build4 (B4) in Coinomi, the self-custody wallet since 2014, on BNB Smart Chain. Your keys stay on your device, and there is no Coinomi account to create.

  • Hold it yourselfYour Build4 keys are created and kept on your device. One recovery phrase restores your whole wallet, and there is no Coinomi account to create.
  • Send and receiveCoinomi adds no fee to send or receive B4. The network you send on charges its own fee, paid in that network's coin, and Coinomi warns you about an unusual fee before you confirm.
  • SwapCompare quotes from several providers and swap B4 for other coins without leaving the wallet, wherever a provider supports the pair.
  • Buy and sellBuy and sell crypto by card or bank transfer through BTC Direct, Simplex and Onramper, where available. Providers set their own fees and checks.

Swap Build4

Trade Build4 for other coins, or other coins for Build4, straight from the wallet where you hold the keys.

  • Swap B4

    Compare quotes from several providers and trade B4 for other assets.

    Swap Build4

Popular swaps

Providers set their own fees and checks, shown before you confirm.

Where Build4 lives

In Coinomi, Build4 is supported on:

The same token can exist on several networks. Send and receive on the same network, and check it before you send.

Build4 wallet questions

Is Coinomi a self-custody Build4 wallet?

Yes. Coinomi creates and stores your Build4 keys on your device, and there is no Coinomi account to create. Only you can move your B4. That also means Coinomi can't recover a lost recovery phrase for you.

What does it cost to hold or send Build4?

Coinomi is free to download, and it adds no fee to send or receive B4. The network you send on charges its own fee, paid in that network's coin. Swap and buy providers set their own fees.

How do I buy or swap Build4?

Open Coinomi and choose swap to trade another coin for B4, wherever a provider supports the pair. You can also buy crypto by card or bank transfer where available. Providers set their own fees and checks.

Which devices does the Build4 wallet work on?

iPhone and iPad, Android, Macs with Apple silicon, Windows and Linux. The same recovery phrase opens your wallet on each of them.

How do I restore my Build4 wallet?

Install Coinomi, choose to restore a wallet, and enter your recovery phrase. One phrase restores every coin in the wallet, and Coinomi can scan for the coins and accounts you used before. Keep the phrase offline and private.

Can I swap Build4 for another coin?

Yes, wherever a provider supports the pair. Open Coinomi, choose swap, and compare quotes from several providers to trade B4 for another coin. Providers set their own fees and checks, shown before you confirm.