To install custom app or watchface, you need their bin-file and smartphone.
Android
Install application MiBand7, if you don't
- Launch MiBand7 app;
- Touch menu button on bottom-center, select "Install your watchface";
- On that screen, select your bin-file and preview image. If you don't have preview image, use any other, it doesn't affect anything;
- Select last install method ("Sync direct;y"). Select your device in list;
- Wait until install will complete.