Get notified exactly when it matters: when charging starts or stops, when the battery is full or running low, or when it's getting too hot or too cold. Battery Alarm turns your phone's built-in battery sensor into a fully customizable alarm system — no ads, no account, no internet connection required.
⚡ CUSTOM ALARM RULES
Create unlimited alarms triggered by:
• Charger connected or disconnected
• Battery full, or battery low at a percentage you choose
• Temperature too high or too low, at a threshold you choose, in °C or °F
Each alarm can ring with your chosen ringtone, speak a custom message out loud, repeat on a schedule, snooze, vibrate, and even ring through silent mode when it matters most.
🔔 FULL-SCREEN ALARMS THAT DON'T GET MISSED
Alarms fire full-screen, right over your lock screen — just like your morning alarm clock — so you never miss a charger left unplugged overnight or a battery about to die.
🔋 BATTERY & DEVICE INFO AT A GLANCE
Live battery level, health, voltage, technology, charging status and source, plus device model, RAM, storage, and OS version — all in clean, easy-to-read cards.
🌡️ TEMPERATURE MONITORING
Track your battery's real-time temperature in °C or °F, with an instant Normal / Warm / Hot status.
📊 CHARGE HISTORY
Every charging session is logged automatically — start time, duration, and battery gained — so you can spot a failing charger or cable early.
🎨 CHARGING ANIMATIONS
Choose from a gallery of animated charging themes that play full-screen every time you plug in.
⚙️ CHARGING TOOLS
Live current draw and wattage readout, plus a built-in charging power test to check whether your charger is really delivering its rated power.
📱 HOME SCREEN WIDGET
Keep an eye on battery level and temperature without opening the app.
💾 BACKUP & RESTORE
Export your alarms and settings to a file you control, and restore them any time — no cloud account needed.
🌙 LIGHT, DARK & SYSTEM THEMES
Available in English, Spanish, French, German, and Portuguese, with more languages on the way.
🔒 YOUR PRIVACY, RESPECTED
Battery Alarm requests no internet permission — it has no technical way to send your data anywhere. No accounts, no ads, no analytics, no trackers. Everything stays on your device, period.
Whether you're trying to catch a swelling battery before it's dangerous, avoid overcharging overnight, or just want a heads-up the moment your phone is topped off, Battery Alarm gives you exactly the alert you asked for — nothing more, nothing less.