Adaptive Theme: Auto Dark Mode

Lexip

About this app

Adaptive Theme automatically switches your system theme between light and dark based on your ambient light sensor — not a fixed schedule.


🌟 FEATURED ON
• Android Authority: "A brilliant app that once installed makes you wonder how you lived without it. [...] This app gives Android the automatic dark mode feature it desperately needs."
• HowToMen (YouTube): "No tapping, no schedules needed. It just does it on its own. [...] And don't worry, it's not killing your battery either."
• Computerworld: "This is how Android's dark mode should have worked since the start. Ready for an overdue injection of extra intelligence?"
• How-To Geek: "With a simple app, you can make dark mode (and light mode) switch with the lighting around you."


Why Adaptive Theme?
Most Android phones only switch themes at sunset or on a fixed schedule. Adaptive Theme uses your device's ambient light sensor to switch intelligently — optimizing readability, eye comfort, and battery life based on actual lighting conditions.
Get the readability of light mode in bright daylight and the eye-comfort of dark mode in low light. A true automatic dark mode experience that native Android doesn't offer.


Key Features
• Smart Ambient Detection: Uses your device's physical light sensor to automatically toggle the system dark mode.
• Full Customization: Set your own lux threshold or pick a preset (e.g. indoor, outdoor, sunlight).
• Battery Friendly: Event-driven architecture — only checks the sensor when you turn the screen on. Zero background battery drain.
• (Ad-)Free: Free, no ads, and open-source. Source code publicly available on GitHub (xLexip/Adaptive-Theme).
• Shizuku Support: One of multiple setup methods.
• No Root Required: Works on stock devices. Root supported as an alternative.
• Material You design: Dynamic UI that adapts to your system theme and colors.
• 50+ Languages: Fully localized for a global audience.


One-Time Setup Required
Android requires a one-time permission grant to allow theme switching. Adaptive Theme makes this straightforward, you can use one of the following options:
• Web Tool (Recommended): Browser-based setup via a secondary device — no ADB installation needed.
• Shizuku: Grant the permission directly on your phone with Shizuku.
• Root: One-tap setup button for rooted devices.
• Manual ADB: Run a single ADB command yourself.

The one-time permission grant is required because Android restricts apps from changing the system theme by default. The permission (WRITE_SECURE_SETTINGS) only allows changing system settings such as the dark mode toggle — it does not grant root access or read any user data, and is fully reversible by uninstalling the app.


How It Works
To avoid screen flicker and unnecessary background work, Adaptive Theme follows a strict, event-driven model:
• Screen-on trigger — The light sensor is only sampled right after the screen turns on, not continuously.
• Obstruction Check — Validates that the sensor is not covered (e.g. by a hand or pocket).
• Instant apply — The theme is switched before you start interacting.

This design ensures mid-session theme changes never interrupt your use, since some apps handle live theme changes poorly.


Made with 🥨 in Germany

Ratings and reviews

Marvelous! The setup takes a couple minutes but it's really not that bad. It walks you through 3 straightforward steps. You have to connect via usb to a PC but TRUST ME as someone who has been trying to find a way to do this, it is by far the easiest and most battery friendly way I've seen it done. Android is (rightfully) secure and this respects that. My only suggestion would be to prompt the user to exit developer mode after setup is complete. :) THANK YOU! Now for my husband's phone.

great and very useful app, i wish it could change the wallpaper tho. thanks for the fast response!

I know it's gonna be great because Howtomen mentioned it, and I'm even using one of the apps he already mentioned to type this with my voice. It's awesome.

What’s new

https://github.com/xLexip/Adaptive-Theme/releases