Is there any sort of documentation for the Android SUOTA app to go along with the source code?

I am currently building an application for my company that needs to be able to update the firmware over bluetooth low energy connection but I can't seem to find any docs on the SUOTA app and the source code is difficult for me to understand. We are using the DA14531 Tiny module. Are there any docs or is there someone I can speak with who would be willing to help me build this out for a price?