SAI is an advanced APK installer with split APK support. It also has simple app backup/export functionality.
SAI can install apps using standard Android API, using root access or using Shizuku.
SAI is an open-source app, you can get the source code on its GitHub repo - github.com/Aefyr/SAI
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.
This app passed the security test for virus, malware and other malicious attacks and doesn't contain any threats.
ClearOS Mobile 10
ACCESS NETWORK STATE, FOREGROUND SERVICE, INTERNET, READ EXTERNAL STORAGE, REQUEST_INSTALL_PACKAGES, WAKE LOCK, WRITE EXTERNAL STORAGE, BILLING, BIND GET INSTALL REFERRER SERVICE