Daya: Battery Health & Info

Know your battery, honestly. Daya shows your battery health, how fast you are charging and how your battery is used, without draining it or nagging you.

Most battery apps keep a permanent notification and a service running all day. Daya does not. It takes a short reading every 15 minutes and measures more closely only while your phone is plugged in, so it barely touches the battery it is measuring.

BATTERY HEALTH YOU CAN TRUST
• Estimated battery capacity (mAh) and health (% of design capacity), calculated from your real charges.
• Every number says where it comes from: "Measured by Android" or "Estimated by Daya", with a range that shows how sure the estimate is.
• Health gets more accurate with each charge and does not jump up and down from day to day.
• Charge cycles (on Android 14 and later when your phone reports them), temperature, voltage and the battery health status reported by Android.
• If your phone does not report a value, Daya tells you instead of inventing a number.

LIVE CHARGING
• Charging speed in watts and milliamps, voltage and temperature, updated every second.
• Time to 80% and time to full.
• Charger rating: slow, standard, fast or super fast, with a hint when a cable or charger seems to limit your speed.
• Opens straight to the charging view when your phone is plugged in. No ads on this screen.

CHARGE ALERTS THAT RING ONCE
• Charge limit alert (80% by default, adjustable) to help reduce battery wear.
• Full charge, low battery and high temperature alerts.
• Each alert rings once per charge. No repeating notifications.

HISTORY AND USAGE
• Every charging session: start and end level, duration, average and maximum power, temperature and the capacity measured in that session.
• Battery level and usage charts for 24 hours, 7 days and 30 days.
• Drain per hour with screen on and screen off, and estimated time left.

LIGHT AND PRIVATE
• No permanent notification, no always-on service.
• No account, no analytics. Your battery history stays on your phone and moves to a new phone with Android backup.
• Small download, works offline, light and dark theme, 18 languages.
• Free home screen widget.

DAYA PREMIUM (OPTIONAL)
Core battery features are free forever. Premium removes all ads and adds unlimited history, CSV export and accent themes. Unlock it for life with one small, one-time thank-you: buy us a drink, a snack or dinner. You choose the amount, every option gives the same lifetime Premium, and nothing renews.

Battery health and time estimates are calculated from what your phone reports and vary between devices. Always follow your phone maker's charging guidance.