Optimized for iPhone Duo. Built with the latest SDK, the app fills the entire inner display and automatically adjusts its layout whether the device is folded or open. Score your battery health and see the trend. Estimate when maximum capacity drops to 80%. Export a resale battery report before you sell. Settings shows today's maximum capacity, not how it changes. BattAI works as an ongoing battery health check and battery monitor: it records battery level and charging as you use your phone and turns them into a score, a trend, an 80% estimate and reports. Upgrading, selling or buying a used phone? Show the battery's condition with a score and a report. BATTERY HEALTH SCORE • A 0–100 score in five levels: Excellent, Good, Fair, Needs care, Service check • What shapes the score: capacity 40%, cycle count 25%, device age 10%, heat exposure 10%, charging habits 15%, with the main factor called out CAPACITY TREND AND 80% ESTIMATE • Maximum capacity readings on a chart with a 95% confidence range • Monthly capacity change shows how fast battery wear builds up • An estimated range of months until 80%, to plan a battery replacement or a new phone when battery life starts to matter CHARGE CARE • Every charge gets a 0–100 charge care score from start and end level, charge rate, time at 100% and more • Charge range (for example 30% → 88%), duration and charge rate: Slow, Typical, Fast or Very fast • Habits scored one by one (discharge depth, charge ceiling, overnight charging, heat while charging, frequency), with tips such as using 80–90% when it suits you BATTERY ALERTS • Full charge alert at the percentage you pick: 80%, 90% or 100% • Low battery alert at 10%, 20% or 30% • Heat alert when your phone runs hot • Unusual drain notice inside the app when drain rises above this device's usual level DRAIN AND HEAT • Drain per hour and overnight standby drain, so fast drain is easy to spot • 7 days of device heat show when your phone runs warm REPORTS AND EXPORT • Resale report: one page for a buyer, with the source of each value and steps to check maximum capacity in Settings • Full report (3 pages) or concise report (1 page with the 80% planning range) as PDF or PNG; raw readings as CSV or JSON • Move your history to another device when you switch phones WIDGETS, APPLE WATCH AND SHORTCUTS • Home Screen and Lock Screen widgets show your score, maximum capacity and today's drain • Watch app and complications put your score and 80% estimate on your wrist • Shortcuts: check your score, or add a reading when you plug in or unplug IMPORT AND PRIVACY • Import maximum capacity and cycle count from the system's Analytics Data file, or enter them yourself. Only cycle count, nominal charge capacity and design capacity are read. • No account, analytics, tracking, third-party SDKs or network requests. Data stays on this phone; only a minimal snapshot goes to your paired watch. Delete all data anytime. Some features require a purchase: unlimited history, the 80% planning range, PDF battery reports, CSV and JSON export, unusual drain alerts, charging-rate exposure, all widgets, the weekly battery care summary and moving data to another device. SOURCES AND LIMITS Public system APIs provide only battery level, charge state, Low Power Mode, whole-device thermal state and time; maximum capacity and cycle count come from you or a file you import. Heat refers to the whole device, not battery temperature. Scores and estimates are calculated ranges, not official or manufacturer values, and not a promise of how long your battery will last. The first report before a purchase needs 14 days of readings; the 80% estimate needs at least 3 maximum capacity readings spanning 30 days or more. Alert timing can vary because the system schedules background checks.
Utilities · iPhone, iPad · Free
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