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MetroVault

Name: MetroVault
Author: Gorun Jinian

Gorun Jinian

Air-gapped Bitcoin signer for offline cold storage. QR-only, no network.

Finance
FOSS
Free
No ads
No tracking

Android only

Get MetroVault

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What are these stores? F-Droid, GitHub, Zapstore

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.

Developer: Gorun Jinian
Website: gorunjinian.com
Source code: github.com/gorunjinian/MetroVault
Added to AppCosmos: 10 October 2026
License: GPL-3.0-or-later