Are there photo apps you only pay for once?

Yes — Bubbles In Time costs $2.99 exactly once. No subscription tier, no ads, no upsell prompts between your memories.

The longer answer

'One-time purchase' is becoming the rarest feature in software. It's this app's whole pricing model.

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.