About
This open-source Bitcoin wallet offers a progressive framework for users to manage their cryptocurrency, balancing security, fees, and user experience. It guides users through four difficulty levels, from beginner-friendly Lightning Network transactions to advanced self-custodial hot and cold storage vaults.
What's New in Cypher Box
0.1.7
August 22, 2026
- Hot vault: Add your own entropy with dice rolls and an optional passphrase when setting up your hot vault. - Upgraded the Bark engine (0.6.1) for reliability across capsule refresh and unilateral exit. Your capsules now renew themselves through the server without keeping the app open, and you keep full unilateral-exit control the entire time. - Automatic capsule maintenance: received capsules auto-refresh, and a background sweep renews capsules economically well before they expire. - One-tap dust consolidation: combine tiny leftover capsules into a single healthy one instead of leaving them stranded. - Emergency exit hardened: Clearer capsule status and expiry warnings, and recovery for stuck refreshes. - Custodial tokens now encrypted with a device key held in the secure keychain.
MoreFAQ
What is Cypher Box?
Cypher Box is an open-source Bitcoin wallet designed to help users achieve self-custody of their funds. It offers a progressive framework with four difficulty levels, starting from beginner-friendly Lightning Network transactions and progressing to advanced hot and cold storage vaults.
Is Cypher Box secure?
Cypher Box prioritizes security with features like private keys never leaving the device, SegWit-first implementation, and BIP39 support. For enhanced security, it allows connection to hardware devices for cold storage vaults.
Can I use Cypher Box for large amounts of Bitcoin?
Yes, Cypher Box supports progressively larger amounts of Bitcoin as you advance through its levels. Level 2 allows for sizeable amounts in a self-custodial hot savings vault, and Level 3 enables deposits and withdrawals of large amounts using a hardware cold wallet.
Does Cypher Box custody my funds?
No, Cypher Box explicitly states that it does NOT custody user funds. The app is designed for self-custody, meaning you retain full control over your private keys and Bitcoin.
What devices does Cypher Box support?
Cypher Box is currently supported on iPhone and iPod devices.
How often is Cypher Box updated?
The latest version of Cypher Box is 0.9, which was last updated on April 24, 2026. This indicates a recent update, suggesting active development.
What is the age rating for Cypher Box?
Cypher Box has an age rating of 4+, making it suitable for a wide range of users.
What are the transaction fees like with Cypher Box?
For Lightning Network transactions (Level 1), Cypher Box offers near-zero fees. For main Bitcoin Network transactions, users can assign a threshold for withdrawals to balance Bitcoin Network fees and counter-party risk.