Feature Request: Simple results filtering

When browsing or searching, I'd appreciate the ability to filter out apps that haven't been updated in X days, i.e., abandonware.

It would also be great if I could filter out (or filter for) apps that weren't targeted for API X, as in targetSdkVersion < 23, 22, etc.

It looks like F-Droid already has all the necessary repository meta for these attributes.

Thanks!