Screen Lock : turn off screen

In-app purchases
4.7
1.1K reviews
5K+
Downloads
Content rating
Everyone
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About this app

【The free version has more than 4,800,000 downloads】

◎ Features in the paid version Only:
- AdFree
- Lighter and better performance
- Unlimited access to all features

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
May 18, 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.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
4.7
1.1K reviews
Eli Nazzaro
August 9, 2020
Excellent! I tried this app a while ago when I was looking for a way to lock my phone by touch screen. It did exactly what I needed it to do. So I used the free version for quite awhile. I noticed that the developer continued to improve functionality and add features. This already good app proceeded to get better and better. And the added features are not just gimmicky; they are really useful. I ended up buying the app, and I rarely buy apps. This is a great screen locker and a whole lot more.
14 people found this review helpful
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Simi Studio
August 10, 2020
Thank you for your reviews and rating. ❤️ Your support is the driving force behind our continuous efforts to provide better products
Timothy Lindsey
July 20, 2020
This is a fantastic app. I have a Samsung Galaxy S9 smartphone with a folio/wallet cover. Since it's a third party cover (not Samsung) the phone does not automatically lock the screen when the cover closes. This app does that while still allowing you to unlock it using your fingerprint. You have to enable this in the settings. Open the phone settings, scroll to Apps, scroll to Screen lock, select it, select open, select advanced setting, scroll down and select Smart Flip Cover. Worth the price.
15 people found this review helpful
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Simi Studio
July 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 app settings.
Chuan Siang Ling
March 15, 2022
I easily decided to buy this app. Kudos to the team developing it, it is the best screen lock + screen block app! Once the setting done right, it works flawlessly!
6 people found this review helpful
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Simi Studio
March 16, 2022
Thank you for your comments and rating. ❤️

What's new

[v10.6] 2022.05.10
◈ (Floating button) Fixed that an unexpected long press action happens when double-clicking the button
◈ Add more icons
◈ Bug fixes

[v10.5] 2022.04.10
◈ Support to display the Accessibility button at the bottom of the screen (Android 8.0+)
◈ Bug fixes

[v10.4] 2022.03.10
◈ (Floating Button) Add vertical bar icon
◈ Support backup and restore (Android 4.4+)
◈ Bug fixes

[v10.3] 2022.02.10
◈ (Quick Menu) Support to adjust the size of icons and text
◈ Bug fixes