Is there a photo memories app with zero ads?

Yes — Bubbles In Time has no ads at any tier because there are no tiers: $2.99 once buys the whole app, and your memories are never an ad break.

The longer answer

An ad between your memories is a stranger in your living room. Some apps sell the seat; this one doesn't have it.

How Bubbles In Time handles it

Add the photos, videos, or message threads that matter to the in-app gallery, grant the one-time overlay permission, and pick a frequency from every 30 minutes to every 4 hours. From then on, memory bubbles drift over whatever you're doing — tap to open, swipe to dismiss, pause the whole layer with one switch whenever you need stillness. Everything runs on-device: no account, no uploads, no ads, $2.99 once.

Worth knowing

The rotation rewards curation over volume — twenty photos you love beat two hundred you tolerated. The Mystery Photo option keeps genuine surprise in the mix, and because nothing depends on a server, the whole experience works identically offline, abroad, and on every modern Android phone.