Schedule automatic updates - not from Google Play? I don't use Google Play with my Android-based phone; mostly I use APKPure and its app.

However, I do want to be able to schedule periodic updates of all apps (or of some apps) - instead of me having to manually approve app update downloads and/op individual app update installation. It could be via APKPure or anywhere else that's sort of respectable, I don't mind - but it can't require something like logging into to Google/Facebook/etc.

Is this achievable?

Notes:


In case it matters - I use Xiaomi RedMi 3s, Android 6.0.1, MIUI 9.2.2.
I'd rather not have to root my device in order to do this. If you think I must, please explain why.
You can try APK updater , also available on F-droid ( if you add  Izzy's repo) and
is meant for cases like yours where you are not using Play store. 


  Update sources
  At the moment four sources are supported:
  
  
  APKMirror
  Google Play
  APKPure
  Uptodown
  


You can schedule daily or weekly updates, time of update and update on startup

Edit: It requires root permissions to update all. You can download the updates for apps you want to update by ignore others, followed by clicking the blue circle icon and install them. 

You would need to give permissions to install from external sources. In screenshot below , I updated a single app "aSpotcat" which shows "installed" and other apps showing "Install"

Not an ideal solution for auto updates since it requires manual intervention if device is not rooted