Securely generate BIP39 seed phrases and split them into Shamir secret shares. Distribute shares across multiple locations and reconstruct your seed phrase by scanning the required threshold of QR codes.

FEATURES

- Generate BIP39 mnemonic seed phrases (12, 15, 18, 21, 24 words)
- Three entropy sources: system RNG, device motion sensor, or combined
- Derive Ethereum addresses from generated phrases
- Split seed phrases into N shares using Shamir's Secret Sharing
- Configure threshold M -- any M of N shares reconstructs the original
- Export shares as printable PDF cards with scannable QR codes
- Scan share QR codes with your camera to reconstruct seed phrases
- Import existing seed phrases for splitting
- Encrypted local vault with AES-256 and device-bound master key
- Optional PIN protection for vault access
- Optional passphrase (BIP39 25th word) support
- Optional Ledger-compatible derivation paths
- Light and dark theme support

SECURITY

- Fully offline. No network requests, no telemetry, no analytics.
- Vault data encrypted at rest using AES-256 with a key stored in the device secure enclave / Android Keystore.
- Shamir's Secret Sharing uses GF(256) polynomial interpolation with information-theoretic security.
- No third-party servers. Your secrets never leave your device except as printed QR codes.

CAMERA USAGE

The camera is used exclusively for scanning QR codes containing Shamir secret shares during the recovery process. No images are stored, transmitted, or processed beyond QR code decoding. No photos leave your device.

This app is designed for self-custody users who want a mathematically secure way to back up and distribute their seed phrases without relying on any third party.

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Additional Information