CellArc

Charging logs, thermal awareness, longevity scoring, trip planning, and practical battery-habit coaching.

CellArc is a battery-habit workbench for iPhone owners who want more context than a single battery percentage.

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:

• 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

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.