WristBattery

Your Watch battery, in view. WristBattery brings your Apple Watch's last measured battery level, charging state and measurement age to iPhone. FREE EVERYDAY FEATURES • Battery level, charging state and measurement details • Basic low-battery reminders below 75%, 50% or 25% • Interactive charging history and estimated charge cycles • Separate names and histories for your saved watches • Home Screen and Lock Screen widgets and a Watch complication • Optional charging Live Activity • Optional private iCloud backup • Siri and Shortcuts for saved battery readings • Setup guides, FAQs and an on-demand system check The overview combines battery, measurement age and daily history, with a night assessment for Premium. The monthly chart shows observed daily ranges; the charging archive offers date navigation. Four sections: Overview, History, Planning and Alerts. Charging Live Activities are free and off by default. Start one manually in the app, or enable a separate optional automatic start while the app is active and a fresh charging reading arrives. After ending one, another automatic start needs a fresh reading showing the Watch off its charger. The activity shows received readings and their age; it does not increase measurement frequency. Starting while the app is closed is not guaranteed. PREMIUM: PLAN YOUR NEXT CHARGE How long might the battery last? Premium adds local runtime estimates, a daytime reserve and a separate optional night plan. The central estimate, range and data basis are explained. The model considers earlier observed errors from suitable discharge periods. More data does not guarantee a narrower or more accurate forecast. Daytime reserve and desired morning battery are separate settings. Night planning accounts for usage before the night starts and during the night. A night profile needs three sufficiently observed nights; otherwise the general data basis is identified. An evening hint is a separate opt-in and is not triggered by uncertainty alone. No sleep tracking or import of Apple's sleep schedule. Personal rules can remind you about low battery, charging start or a charging target. Choose watches, weekdays, time windows, quiet hours and limited repeats. Basic and personal reminders work independently. A charging target does not stop charging. Purchase and trial: Settings > Premium > One-time purchase. Eligible users can try Premium free for seven days, once per Apple Account. No renewal or automatic charge. Permanent Premium is a separate one-time Apple in-app purchase at the Store price, with no subscription. Existing permanent purchases remain valid. Basic features stay free after the trial; Premium settings are retained. Invitations are limited and can be permanently dismissed. MEASUREMENTS AND SYSTEM LIMITS The Watch supplies its own battery readings. The public watchOS value may be rounded and differ from Apple's display. Apple controls background execution, transfers, widgets and notifications. No fixed interval or guaranteed real-time updates. Refresh requests a reading but cannot force the Watch to wake. Forecasts require Premium or an active trial and sufficient recent data. Fresh local observations are recorded even before purchase. Forecasts are estimates, not new measurements. Forecast reminders are optional and separate from measured-threshold alerts. Estimated cycles are not Apple's official cycle count or a battery-health measure. LOCAL AND PRIVATE No WristBattery account, developer server, advertising or tracking SDK. Forecast data and settings stay local and are excluded from the app's private iCloud backup. Device-backup exclusion is requested, not guaranteed. Restored history does not train forecasts. No external AI processes battery history. Diagnostic reports are previewed and shared only at your request. Requires iOS 17 and watchOS 10 or later. Siri availability depends on device, system and language.