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For all the ones asking about libreelec, if you are using it for an ARM device (like an Android TV set), you can install Coreelec (a fork of libreelec for Amlogic chips). It's based on Kodi 18 and it works both with live and archived games.

 Is Coreelec something that can be installed on Android from an APK, like SPMC can be?  

No, it's a very lightweight OS that basically just runs kodi. You can flash it from an SD card on most Android devices, but I think you need a rooted device. It's very easy, you find instructions on their website. Libreelec is basically the same. For what kind of device would you need it? 

NVIDIA Shield, but somewhere in the house I have an old  MX8S+ Android box that I guess that I could dedicate to Coreelec.