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.