The questions people ask

On your own device, syncing privately through your iCloud account. Nothing gets sold or shared — it's just yours. The privacy policy has the full story.

Pretty much anything that takes regular batteries: remotes, smoke detectors, bike lights, toys, scales, clocks, wireless keyboards — you get the idea.

The app watches how often you actually change each battery. The first guesses are rough, but they get noticeably sharper every time you log a swap.