Screen Lock : turn off screen

Contains adsIn-app purchases
4.4
52.2K reviews
1M+
Downloads
Content rating
Teen
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About this app

【Over 5,000,000 downloads, thank you for your support!】

Just one touch to turn off or lock screen.
Frequent use to turn on/off screen can easily damage the phone's physical power button. We provide virtual buttons to replace it and extend its useful life. You can also set buttons to perform other actions.

★ You can set the buttons to display in different locations:
- Display on home screen
- Display in the notification panel
- (Floating button/Assistive Touch/Floating ball) Floating on other apps

★ Features for all buttons:
- Built-in lots of free icons or your custom icons
- Vibration/sound/animation of the locking process
- Fix can't unlock screen with biometric authentication (fingerprint/iris/face)
- (Assistive Touch) Show "Quick Menu" to quickly access your favorite apps, games, settings
- Support other actions when the button is pressed:
↪ Application shortcuts
↪ RAM cleaner (system speed booster)/Flashlight
↪ Home key/Back key/Recent apps/Last used app
↪ System settings/Notification panel
↪ Power off phone (Power menu)/Screen capture (Screenshot)/Screen recorder (Android 5.0 and above)
↪ Media control (play/stop/next track/previous track)/Volume control
↪ Keep screen on/Open Web page

★ Features of the floating button:
- Adjustable button size/opacity
- Display weather information/clock widget
- Multiple button shapes (round/rectangular/narrow bar/love)
- Automatically show/hide when the screen is in the fullscreen mode or the selected application is displayed
- Easy touch : Single tap/double tap/swipe the button to trigger the action.

★ Advanced features:
- Air gesture : Wave your hand over the proximity sensor (near the front camera) to wake up or lock screen
- Smart flip cover : Support open or close the smart cover to wake up or turn off screen
- Long-press the Home button to lock screen or do the actions (Android 7.0 and above)
- Shake phone to lock screen or do the actions
- Block touch screen : Block touch screen to prevent accidental touch when watching videos, especially when children are watching. (Android 4.4 and above)

★ FAQ:
https://simistudio.net/screenlock/faq.html

★ Permissions required:
- 👉 If you enable the Device Administrator permission, to uninstall the application, you must manually disable the Device Administrator permission first or uninstall it from the "Uninstall app" option in the application settings. This is to follow the Android security guidelines.👈
- This application requires Accessibility Services to support the following features.
↪ Turn off or lock screen
↪ Home key/Back key/Recent apps/Last used app
↪ Make the floating button automatically show/hide
↪ Power off phone (Power menu)/Screen capture (Screenshot)/Screen recorder
↪ Media control (play/stop/next track/previous track)
↪ Block touch screen
Updated on
Aug 5, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
This app may collect these data types
App info and performance and Device or other IDs
Data is encrypted in transit
Data can’t be deleted
4.4
52.2K reviews
Mau Mama
April 10, 2022
LOVE this app!!! Actually had to install it on ALL my devices now, because once you use it, you can never go back! I literally can not work at all on phones without it anymore! And it's not just for screen lock either, I can't live without their screenshot function! It makes it sooo much easier to use! My only wish is that they can soon add a way to be able to block touch on just 1 side/app, when using a split screen function... (Please, Simi??? 😘)
16 people found this review helpful
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Simi Studio
April 11, 2022
Can we know under what circumstances (use cases) would we need to use this feature? It's recommended to report through the "Send feedback" option in the app settings. It will can help us communicate more effectively.
Anthony Tomasino
September 11, 2021
Does what it should do. I needed a home screen icon to lock my phone. I saw another review that was low and complained they had to click an ad before using it. I'm not sure what they're talking about. Maybe there was an ad when I first opened it, I can't remember (because even if there was it was inconsequential). The lock button works instantly with no ads. A single ad when you first launch it that never interferes with actual use seems like a completely fair trade off for the app being free.
36 people found this review helpful
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Simi Studio
September 13, 2021
Thank you for your comments and rating. ❤️ Your support is the driving force behind our continuous efforts to provide better products.
A Google user
March 21, 2020
My power button is broken, and sure the screen will naturally turn itself off after a few seconds, but having the option to shut it off on the fly was just what I needed and just what this app offers. I can't quite figure out how to use certain aspects of it, but just slapping a custom button on the screen works fine so there is no need to go deeper.
28 people found this review helpful
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Simi Studio
March 22, 2020
Thank you for your reviews and rating. ❤️ Your support is the driving force behind our continuous efforts to provide better products. If any suggestion or problems, you can report through the "Send feedback" option in the Screen Lock settings.

What's new

[v10.9] 2022.08.10
◈ (Quick Menu) Support multi-select method to add button action
◈ (Quick Menu) Support for adding folders
◈ Add new action - Sync data for the selected account immediately
◈ Bug fixes

[v10.8] 2022.07.10
◈ (Quick Menu) Support editing button name
◈ (Quick Menu) If there are multiple pages, switch directly to the last used page after opening the menu
◈ Support to directly open the screenshot/screen recording list page
◈ Bug fixes