App VillageCore workflow
Log, estimate, glance
The official listing describes drink logging, an estimated half-life curve, bedtime planning, and Apple Watch complications.
Watch-first caffeine tracker
Caffeine Tracker: Bedtime
Log popular drinks or exact milligrams on iPhone and Apple Watch, then estimate active caffeine now and near your chosen bedtime.
$1.99 paid appUS App Store · verified July 20, 2026
No subscriptionDeveloper listing statement
No accountLocal-only data
iPhone + Apple WatchOfficial compatibility
Important boundary
An estimate, not a measurement
The source describes estimated active caffeine. This page does not present medical advice or claim the app measures caffeine in your body.
Official listing check · July 20, 2026. Apple's US listing shows a $1.99 paid app and says data is local-only with no account or subscription. Its App Privacy label says “Data Not Collected”; Apple notes that privacy information is supplied by the developer and is not verified by Apple.
Ownership disclosure. Caffeine Tracker: Bedtime is developed by Nicholas Wong, who also owns and edits App Village. This page is a first-party listing, not an independent review or hands-on test.