They very recently moved to require an special additional app just for installing their new .apks file (which is a file containing multiple .apk inside), called

They very recently moved to require an special additional app just for installing their new .apks file (which is a file containing multiple .apk inside), called SAI. That would be fine by me, if it wasn't because SAI requires Android 5.0, while my Nvidia Tegra -like tablet (Xiaomi MiPad 1) is stuck on Android 4.4 :-( (no, Lineage and friends is not a good replacement, they all break the camera, and yet worse, suck battery like crazy)