Android apps kept for one reason: people still open them weeks after installing, because they still have a job to do.
A flashy interface gets an app installed once. Useful APKs only keeps an app listed if people are still opening it weeks later, because it does a job they actually have.
An app stays listed because people keep it installed long after the first open, not because its icon is well designed. Publisher and category sit next to every entry so you can judge the fit yourself.
Every page here is written out in advance and served exactly as built, so it opens the moment you tap it. A tool you have to wait for stops being convenient.
If there is an app you open every day and it is missing here, say so through the contact form. Daily use is exactly what this site is meant to track.
Apps built to be installed once and forgotten, plus repackaged copies and installers offering unlocks that are not theirs to give. None of them do a job worth keeping.
Useful APKs is put together by people who would rather own five apps they open weekly than fifty they opened once.
An app stays listed for as long as it keeps doing what it was picked for. One that stops working properly, or stops being updated, is dropped rather than left as dead weight.
A good tool disappears into the job it does.