Precision Without the Drain.
Most battery apps drain your power just to measure it. HeyBattery is different. Designed with a "Zero-Drain" philosophy, it monitors your battery health, deep sleep cycles, and charging speeds without running heavy background services.
- ⚡ Zero Background Drain: No persistent services running in the background. We calculate stats mathematically using system timestamps only when you open the app.
- 💤 True Deep Sleep Tracking: Accurately measures how long your device's CPU stays in deep sleep mode to identify rogue apps causing battery drain.
- 📊 Hybrid Prediction Model: Estimates remaining battery time by combining your long-term usage history (40%) with your current session's drain rate (60%).
- 🔌 Real-Time Charging Stats: Monitor live Voltage, Watts, and Temperature while charging.
- 🛡️ Battery Health Protection: Passive tracking of charge cycles.
- 🕵️ 100% Private: No internet permission required. No data leaves your device.
HeyBattery respects Android's modern architecture:
- JobScheduler & Passive Monitoring: Instead of keeping a service alive, we schedule a system job that only triggers momentarily when you plug/unplug the charger.
- Boot Signature: We track device reboots using a unique boot timestamp signature to prevent data corruption during restarts.
- Delta Calculation: Deep sleep and usage stats are calculated retroactively using kernel counters (
elapsedRealtimevsuptimeMillis), ensuring 0% battery impact.
You can clone this repo and build it using Android Studio, or download the latest APK from the releases page:
Made with ❤️ by GhostyApps