Rainbow Battery Bar

RainbowBattery shows your battery level as a slim, color-coded bar drawn over your screen, so you can check your charge at a glance without unlocking your phone.

FEATURES

• Color gradient bar — the bar's color shifts across the spectrum as your battery level changes.

• Animated charging indicator — a moving highlight sweeps along the bar while plugged in.

• Adjustable position and thickness — place the bar at the top, bottom, left, or right edge of your screen.

• Burn-in protection — built for OLED/AMOLED displays: the bar's position and brightness shift gradually over time to help prevent it from marking your screen, with an adjustable brightness level and the option to turn this off.

• Customizable notification — choose which battery details to show: percentage, temperature, health, charging source, technology, and voltage. Tap the notification to open settings, or use its button to quickly show or hide the bar.

• Sound alerts — optional sounds when your battery reaches full charge or drops below a threshold you set, each with its own repeat count.

• Start on boot — optionally have the bar reappear automatically after your phone restarts.

• Respects full-screen apps — optionally hide the bar automatically in full-screen video and games.

PERMISSIONS

• Display over other apps — required to draw the battery bar.

• Notifications — used for the persistent status notification.

• Foreground service — keeps the bar running reliably.

RainbowBattery runs as a lightweight background service and does not collect or transmit personal data.