1. On the tablet, open the web browser
  2. Visit http://demo.stratisems.com/android/
  3. Tap on <version-apk> to download <version>
  4. Once download is complete, tap on the downloaded file to install <version>
  5. You should be able to open StratIS Sphere and be able to run <version>

If you are unable to tap on the downloaded file you will need to navigate to apps -> file manager -> downloads -> <version-apk>