CellArc — Battery habit workbench

Features

What it does

Battery dashboard with current state and habit trend

Battery Action Plan with ranked next steps, severity tags, and evidence links

Charging session log from plug-in to unplug, with a charge-speed trend chart that surfaces early capacity-loss signals

Thermal timeline with threshold callouts

Longevity score based on heat, high charge time, deep discharge, and cycle patterns

Charge profile coach with practical habit recommendations

Best-time-to-charge and model-calibrated trip planning helpers

App-hog session labels for user-recorded drain comparisons

Offline Battery Field Guide with 22 visual reference plates

Long-storage reminder and lifetime energy views

Offline charger reference: every Apple adapter from 5W through MagSafe and 27W USB-C PD, with USB Power Delivery tier explanations

The app helps you review charging sessions, thermal exposure, daily drain, trip needs, and habit patterns that affect long-term lithium-ion health. Version 2.1 adds Battery Action Plan, a ranked coach that turns those signals into the next best things to do now.

Core tools:

CellArc is honest about iOS limits. It estimates trends from signals available to public apps and explains where iOS keeps deeper device data private. Battery Action Plan cites Apple battery guidance and UIDevice public API documentation directly in the app.

Battery logs and settings stay on your device. CellArc does not request protected device permissions, does not pair with external accessories, and does not require a network connection.

Privacy

Private by design

CellArc does not require an account and does not include third-party advertising or analytics SDKs. Content you create stays in the app on your device unless you explicitly export or share it. See the privacy policy.