For most people, the phone is where they hold and use crypto. A mobile crypto wallet has to be as easy as a banking app and as secure as a vault: quick to open, clear about what is being signed, and impossible to drain if the phone is lost. We build custom wallets for iOS and Android, for companies that want a wallet in their own brand, for their own ecosystem or as part of a larger app.
Security on Mobile
- Hardware-backed key storage: keys protected by the Secure Enclave on iOS and the Android Keystore, unlocked with biometrics.
- Passkeys and smart accounts: wallets without a seed phrase, with recovery options, using smart accounts.
- Readable signing and simulation before each transaction, plus warnings for risky approvals. See blind signing prevention.
- App hardening: protection against screenshots of sensitive screens, jailbreak and root detection where appropriate, and no secrets in logs or backups.
Features Users Expect
- Multiple chains and tokens, with balances and history.
- Connecting to dApps through WalletConnect and deep links.
- Push notifications for incoming transfers and completed transactions, driven by event listeners.
- Gasless transactions, swaps and, if needed, buying crypto through an onramp partner.
- Bluetooth or QR hardware wallet signing.
How We Build It
We start with requirements and clickable prototypes in Figma, then build with React Native for one codebase on both platforms, or natively in Kotlin and Swift when performance or platform features demand it; .NET MAUI is an option for C# teams. Both app stores have specific rules for crypto apps, and depending on features such as custody or buying crypto, regulation such as MiCA can apply. We take both into account from the design phase, together with your legal advisors.
Frequently Asked Questions
React Native or native?
React Native suits most wallets and saves building twice. Native makes sense for heavy custom cryptography or deep platform integration.
Custodial or non-custodial?
Non-custodial means users hold their own keys; custodial means you do, which brings far more regulatory obligations. Smart accounts offer a middle ground for user experience.
Can the wallet be part of our existing app?
Yes. Wallet functions can be added as a module inside an existing app.
Who owns the code?
Ownership of the source code is set out in the contract, and the code can be fully yours, including documentation and tests.
Part of our crypto wallet development. See also mobile app development.
Build Your Mobile Wallet
Tell us who your users are and what the wallet should do. We will build an app that is easy to use and hard to attack.