Looking for beta testers - I built a free, educational Bitcoin-only wallet app for Android that lets you practice self-custody without risking real money

Hey everyone,

I've been building an Android app called Black Koi Wallet for people who want to learn Bitcoin self-custody but are nervous about making irreversible mistakes with real funds.

The idea is simple: you get a real wallet, real transactions, and real fees — but on a test network (Signet) where the coins have no value. A built-in faucet sends you practice sats automatically so you can start immediately. Nine structured tutorials walk you through everything from seed phrases to fee management to key backup. A three-tier glossary explains every Bitcoin term at the level that works for you.

Complete all the tutorials, pass a competency quiz, and you unlock real Bitcoin (mainnet) access within the same app.

I'm looking for 10+ beta testers to try it out over the next couple of weeks and give honest feedback. No Bitcoin experience required - actually, the less the better.

If you're interested, drop a comment or DM me and I'll send you the details.