Source code of "release ready" Ionic app

I’m slowly finishing my 1st app. As I’m not professional developer (yet :wink: ), I’m aware my app misses several elements required for app to be on “professional” level. Unfortunately, all cases/examples on web are dealing with specific problems, not tackling the overall app design/functioning. So I was wondering, are there any open source examples of whole, good quality, ionic apps? So that newbies can learn how to design and build robust Ionic app?