You hold the keys.
We hold nothing.
Sealda is a self-custody, privacy-first wallet. Your recovery phrase is generated on your device, encrypted with your PIN, and never leaves it. We don't run a backup service. We don't keep your seed. We can't help you recover it — and that's the point.
No sign-up. No KYC. No account.
Built around one rule
If we don't store it, no one can leak it.
Non-custodial by design
Keys are derived locally from your BIP-39 mnemonic. No copy ever lands on a server, an iCloud blob the user didn't ask for, or a database we run.
Multi-chain
One wallet, three networks. Send and receive TRX / USDT-TRC20 / USDC-TRC20 on Tron, ETH / USDT / USDC on Ethereum, BNB / USDT / USDC on BSC.
Open architecture
iOS native app and web client share the same vault format. Pair the web watch-only view to your iOS signer with a QR — desktop never sees the seed.
Local PIN + biometrics
PIN-encrypted vault on-device with optional Face ID / Touch ID unlock. Auto-lock kicks in after a configurable interval of inactivity.
Hidden wallets
Add a passphrase on top of your seed and a fully separate wallet appears — ephemeral, never persisted, leaves no trace on your device.
No analytics. No ads.
We don't track you across sessions. We don't fingerprint your device. There is no third-party SDK reading your balances.
Your phrase is your responsibility.
When you create a wallet, Sealda generates a 24-word BIP-39 recovery phrase on your device and shows it to you exactly once. Write it down. Store it offline. We never see it.
There is no "forgot password" link, no support agent who can recover funds, no email reset flow. That's the trade-off self-custody asks of you — and it's why your funds stay yours, even if our website disappears tomorrow.
- Device-local key derivationBIP-39 mnemonic → BIP-32 master key → BIP-44 per-network keys, all computed in your browser or iOS app.
- Argon2id-stretched PINYour PIN is stretched with Argon2id before unlocking the on-device vault. AES-GCM seals the seed at rest.
- Watch-only web pairingThe web client can be paired to the iOS signer via QR. Send requests are signed on the phone — desktop only sees public addresses.
- Open building blocks@noble/curves, @noble/hashes, @scure/bip32. Standard, audited cryptography. No home-rolled signing.
Native support
Ready to take custody?
The iOS app is in beta. The web wallet works in any modern browser.