Coconut Vault: Bitcoin Signer

Coconut Vault — Offline Bitcoin Signer for Complete Self-Custody Coconut Vault keeps your private keys secure in a fully air-gapped environment. Sign PSBTs (Partially Signed Bitcoin Transactions) without any internet connection. Designed for those who take Bitcoin security seriously, Coconut Vault uses hardware-level protection (HSM / Secure Enclave) to isolate your private keys from the OS and other apps. Key Features - QR-based PSBT signing (fully offline) - Hardware security module protection for private keys - Compatible with Coconut, Sparrow, BlueWallet, and Nunchuk watch-only wallets - Auto lock & memory zeroize when network is detected - Selectable operation modes (Signing-only / Secure storage) Your keys. Your vault. Your Bitcoin — Coconut Vault.