SAI is an app for installing split APKs – apps that consist of multiple APKs. It has both rootless and rooted installation methods.
SAI is an open-source app, you can get the source code on its GitHub repo
Please note that SAI only installs user-provided files and is not responsible for those apps behavior.
Please also note, that some devices/ROMs aren’t supported by SAI, that has to do with bad Android API implementation in said ROMs and can’t be fixed on app side.

Download from the Play Store
Download from F Droid

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