Open CellArc and swipe the tab bar at the bottom to reach any screen. The Home tab shows your current battery level, longevity score, and recommended actions. Everything updates automatically while the app is open.
Support
CellArc Support
Help, troubleshooting, and contact information for CellArc (version 1.2, build 4).
Go to Settings → Your iPhone and pick your model from the list. This calibrates the watt-hour energy math across all screens (Lifetime Energy, Cable Diagnostic, Cycles, Trip Planner) to your battery's actual capacity.
The Charging tab now shows a chart of how long each session took to reach 80%. Only sessions starting below 42% are included so the comparison is fair. The regression line and verdict label (Slowing / Stable / Improving) appear after 6 qualifying sessions.
Swipe to the Charger tab (last tab) for an offline reference covering all Apple charger tiers, USB-C PD specs, and best-practice guidance. No network required.
Settings → Export gives you three options: charging sessions as CSV, daily rollups as CSV, or a plain-text summary report. Tap one and iOS will present the standard share sheet.
Email the App Store product page with your iPhone model, iOS version, and a short description of the issue. Screenshots are welcome.
Common Questions
Why does the longevity score change day to day?
The score reflects your last 7 days of behavior — thermal exposure, time above 80% while plugged in, deep discharges, and daily cycle rate. Improving any one of those will push the score up within a week.
What does the Charge Speed Trend show?
It plots the time each session took to reach 80% state-of-charge, filtered to sessions that started below 42% for a consistent baseline. A rising trend (Slowing verdict) is an early signal that the cell's constant-current acceptance rate is dropping — one of the first measurable signs of capacity loss.
Why does energy math change after I pick my model?
Different iPhone batteries hold different amounts of energy. An iPhone 12 mini holds about 8.6 Wh; an iPhone 16 Pro Max holds about 18.5 Wh. Without your model set, CellArc uses a 12 Wh generic fallback. Selecting your model makes watt-hour numbers and the Trip Planner energy budget much more accurate.
Does CellArc require an account?
No. CellArc has no account, no login, and no server. All data lives on your device.
How do I clear all data?
Settings → Data → Clear All Data. This erases all snapshots, sessions, and rollups. The action is confirmed before proceeding.
How do I remove the app?
Long-press the icon and choose Remove App. iOS deletes all app data at the same time.