[Broge]

For me probably filters that are actually useful e.g. Top free apps with no ads

Whats annoying is that Google play has all the data to let you do this but they don't let you filter by if it contains ads or not.

[throwawaymobule]

Would that even be possible for web apps? They could be updated at any time.

There are third party apps to access Google play, but I've never uses them so I don't know if that feature exists.

[arielcostas]

There could be a report feature. If I visit your site because you claim there are no ads, but I do get them, I can report your app and have someone verify it