BBB · BIG BLACK BOOK

Install on Android

Download the BBB test APK (arm64, v1.1.0). Uninstall any older Cobro / CoBroker build first — this is a new app id.

Download BBB APK Or open web app
  1. Open this page on your Android phone (Chrome recommended).
  2. Tap Download BBB APK.
  3. If asked, allow Chrome to install unknown apps for this download.
  4. Open the downloaded file and tap Install.
  5. Launch Big Black Book and sign in with a demo number.
Mock OTP: 123456
Demo Broker User Admins: 9999990001–0004
Requires a 64-bit ARM phone (most devices from ~2017+). Test build for sideloading — Android may show “unknown app” / Play Protect warnings; choose Install anyway for testing.