SAI (Split APKs Installer) — this is a feature from Google, which shares (split) application on a few different APK . Each APK is a full and independent version of the app, but they don’t work individually, these APKS must have the same package name, and must be signed with the same key. What it needs is a kind of “LiteMod” made by the author of the application. Basically, the authors create an APK with support for all device configurations at the same time, this leads to an increase in the weight of the application. Therefore, Google began to recommend the authors to divide the APK into parts if its weight is more than 50 MB.
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