MetroVault

Gorun Jinian | Wallet

4 Downloads 15 Views v3.9 3.05 MB 4.1+

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(3.05 MB)

Editor's Overview

MetroVault is a wallet application developed by Gorun Jinian, packaged as a single Android APK of version 3.9 weighing in at 3.05 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 3.05 MB, so it installs quickly even on modest connections.
This build is signed by "Gorun Jinian" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

MetroVault turns an Android phone into a secure, air-gapped Bitcoin signing device like a cold-storage hardware wallet. It acts as an offline signer for your watch-only wallets (such as Sparrow, BlueWallet, or Electrum) running on an online device. Your private keys are generated and kept on a phone that never connects to the internet; all communication happens through QR codes, and network access is blocked at the Android level.

Because the keys never touch an online device, the attack surface for theft and malware is dramatically reduced. MetroVault is fully open source and auditable, built on a custom Kotlin Bitcoin library so every cryptographic operation can be reviewed.

Security

* Air-gapped operation — designed for devices with no internet (airplane mode, Wi-Fi/Bluetooth off)
* Dual-layer encryption — AES-256-GCM with PBKDF2 (210k iterations) plus the Android Keystore
* Biometric unlock — hardware-backed fingerprint/face authentication
* Plausible deniability — separate "Main" and "Decoy" wallets behind different passwords
* Brute-force protection — exponential backoff with lockout, and an optional automatic wipe after repeated failed logins
* Screenshots and screen recording are blocked app-wide

Wallets

* Single-sig and multi-sig (collaborative custody) support
* Address types: Native SegWit (bc1q), Taproot (bc1p), Nested SegWit (3...) and Legacy (1...)
* BIP-352 Silent Payments support, both to send to or spend from an SP wallet
* BIP-39 passphrase support, saved locally or kept in memory only
* BIP-85 derivation of child seeds and passwords
* Custom entropy from dice rolls or coin flips, plus mnemonic checksum tools
* Testnet4 support for testing

Transaction signing

* PSBT workflow (BIP-174) for single-sig and multi-sig
* Air-gapped flow: scan PSBT, verify, sign, export — entirely by QR
* Animated QR support: BC-UR (v1/v2) and BBQr for large transactions
* On-device address verification and watch-only XPUB/descriptor export
* Message signing and verification

Permissions

MetroVault requests only the camera (optional, for scanning QR codes) and biometric permissions. It has no internet permission and cannot connect to any network.

Details

Version	v3.9
Size	3.05 MB
Developer	Gorun Jinian
Category	Wallet
Package	com.gorunjinian.metrovault
Android	4.1+
Last Updated	Nov 02, 2026
Downloads	4

Frequently Asked Questions

Is MetroVault free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does MetroVault require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is MetroVault safe to install?
We link to the exact APK published by Gorun Jinian. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update MetroVault?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install MetroVault

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.gorunjinian.metrovault.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «MetroVault» by Gorun Jinian and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.