If you as a VitaBit user don't have access to the Google Play Store, you can try the following steps to install Vitabit Android APP.
1. Open http://fir.im/vitabit with your mobile browser.
2. Tap “Download and install (下载安装)” to download an .APK file.
3. Then tap the downloaded file to install it if installing isn’t started automatically. If a warning shows up then please select “Allow” or “Continue installing”.
Or you can also open http://fir.im/vitabit on a computer and scan the QR code with your phone to start downloading and installing Vitabit.