# Coconut Vault-Testnet — Practice Bitcoin Signer

> Practice Bitcoin Signer (iPhone/iPad app by Nonce Lab Inc..)

- Source: https://appshunter.io/ios/app/coconut-vault-testnet/id6651839033 (this page in markdown: same URL + `.md`)
- Developer: [Nonce Lab Inc.](https://appshunter.io/developer/1502682015)
- Category: Education, Finance
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 51 MB
- Languages: American English, Japanese, Korean
- Released: 2024-09-27
- Data updated: 2026-07-18
- User reviews in markdown: https://appshunter.io/ios/app/coconut-vault-testnet/id6651839033/reviews.md

## What is Coconut Vault?

Experience a mobile app designed to teach Bitcoin self-custody!

Coconut Vault is a mobile app that securely stores your Bitcoin private keys and helps you learn how to use a Bitcoin wallet safely.

Key Features:
• Local test network: Practice using a Bitcoin wallet without real Bitcoin. The app provides a local test network so you can safely explore how Bitcoin works and build hands-on experience. (*Real Bitcoin is not supported.)
• Offline security: Coconut Vault continuously monitors internet and Bluetooth connections to ensure the app only runs when it is completely offline.
• Air-gapped communication: Use Coconut Wallet together with Coconut Vault to learn how to safely process Bitcoin transactions even in an offline environment.
• Add a wallet: Choose from fast options like Auto-Generate, Restore, and SeedQR Scan, or the most secure methods such as Manual Coin Toss and Dice Rolls.
• Add multisig wallets


## Version history (last 5 releases)

### 5.0.3 — 2026-06-24

Fixed an Account Index error and minor UI issues.

### 5.0.2 — 2026-06-22

Improved app stability through a Coconut library update.

### 5.0.1 — 2026-06-19

Improved the inheritance wallet flow and UI.

### 5.0.0 — 2026-06-18

You can create inheritance wallets and send Bitcoin through Coconut Wallet.

### 4.1.2 — 2026-04-30

[Fixed]

* Bug where input was reset when entering certain words (e.g. "fancy") during mnemonic entry
* Bug where the vault was locked when retrying biometric authentication within a short period
* Bug where the change button was triggered during mode switching

[Enhanced]

* Improved automatic navigation to the next screen after single-sig wallet signing is complete

## More apps by Nonce Lab Inc.

- [Coconut Wallet-Testnet](https://appshunter.io/ios/app/coconut-wallet-testnet/id6654902298)
- [Coconut Vault: Bitcoin Signer](https://appshunter.io/ios/app/coconut-vault-bitcoin-signer/id6745778502)
- [Coconut Wallet: Bitcoin Wallet](https://appshunter.io/ios/app/coconut-wallet-bitcoin-wallet/id6745778545)

All apps by Nonce Lab Inc.: https://appshunter.io/developer/1502682015

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-18.*