I didnt know which one is safe and didnt want to waste time looking fir an unfilterd site
Discussion
F-droid is the safest, then Apkmirror (this is a website, and not so easy to ise it). And do not use Aptoid, if avoidable, it is tricky and wants root privileges, full of ads.
github is the safest
BTW: F-droid contains only open source softwares. At forst install the Tracker Control from F-droid. This informs you about the other apk's behaviour, and you can block the trackers, etc.