Guardian Screen Lock

Hannah Studios

In-app purchases

About this app

Guardian Screen Lock sits invisibly over your game or other app, locking and dimming the screen to block accidental touches and preserve battery life.

But doesn't Android already do this? No, it does not. Some phone OEM's have custom utilities (such as Samsung Game Booster), but these are manufacturer-specific, not part of Android itself and therefore not available to other phone models. Guardian Screen Lock works on anything.
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KEY FEATURES:

- One-tap arm and disarm via Quick Settings tile

- Screen dimming with adjustable opacity — saves battery and protects OLED screens from burn-in

- Lock with screen fully visible — ideal for videos, fitness apps, recipes, and anywhere where visibility is required but touch input would be disruptive

- Secure unlock — biometric authentication ensures your phone stays protected while your app runs

- Inactivity timer — lock manually or automatically
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IDEAL FOR:

- Idle & Auto-Farm Games — keep games running continuously without screen burn-in or pocket-taps

- Video & Podcast Streaming — listen to long videos or streams without accidental screen touches

- Sleep & Ambient Audio — play white noise or rain sounds overnight without a bright screen illuminating the room

- Fitness & Navigation — track routes or follow recipes hands-free without screen timeouts

- Pocket & Bag Storage — run background tasks safely while walking or traveling
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MONETISATION:

14-day full featured free demo. After that, a one-off small payment to keep premium features. The core app continues to work regardless.
No ads, no subscriptions.
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PRIVACY

No data collected of any kind. All settings stored locally.
App permissions are strictly functional and never used to track activity or harvest data

What’s new

Fixed a crash affecting some devices when arming the overlay from the Quick Settings tile, so it now fails safely. However, some devices with strict manufacturer background restrictions may still be unable to arm via the tile.