Clean Master (Speed Booster)

Cheetah Mobile
- September 16, 2017
4.3 -
Clean Master (Speed Booster) screenshotClean Master (Speed Booster) screenshot
The World's Most Trusted Optimizer, Clean Master, Helps Clean Up Over 400 Million Phones!

When Do You Need Us?
CM is perfect for you if your phone has become laggy or runs out of battery easily, if it's stopped playing games smoothly, if it becomes too hot to hold, or if you want to free up some space to store more photos or songs.

What We Can Do For You
We make it easy to free up more storage from your phone and SD card, boost games and device memory, enhance speed & extend battery life, stop overheating and protect your device against malicious apps and vulnerabilities.

Highlights of Clean Master - Phone Booster & Antivirus

☆ Accurate: The junk-creating behavior of millions of apps has been analyzed so that Clean Master can efficiently hone in on its targets (cache and residual files) with perfect accuracy.
☆ Fast & Intuitive: Simple to use, super-fast and smooth UI, plus cool transition effects
☆ Ranked #1 by AV-TEST for the seventh time! A professional quality antivirus service scans devices in just 8 seconds, 500% faster than other paid antivirus apps.

Features of Clean Master- Phone Booster & Antivirus

Cool off your device by finding and stopping the apps that are causing it to overheat and make your battery last longer!

Delete cache and residual files to reclaim storage, boost speed and improve the performance of your device and SD card.

Boost your games and apps, free up memory (RAM), speed up your device and save more battery. Our 1 Tap Boost and Game Boost features make it easy to optimize directly from your homescreen.

Scan the system, pre-installed and user-installed apps to keep your device safe from viruses, trojans, vulnerabilities, adware and spyware. Keep your privacy safe by scrubbing personal info from your device.

Uninstall unwanted apps or bloatware and back up important ones. Some rooted devices will be able to move apps to the SD card as well as uninstall pre-installed and system apps. Our own Picks section lets you find useful apps that match your interests.

Supported languages

Arabic, Bulgarian, Chinese, Croatian, Czech, Dutch, English, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Spanish, Thai, Turkish, Ukrainian, Vietnamese, Malay

Want to join our volunteer team? Apply to get started:

Stay connected!

Join our community:

Requested permissions

Camera permission: This permission is used for Clean Master's flashlight feature, which uses the camera flash from the device's rear camera. Clean Master does not use the device's microphone at all - Android lists both camera and microphone permissions together, even if only one is used.

Help fight against deceptive ads

Cheetah Mobile (formerly KS Mobile) is committed to fighting against misleading downloads. You can find our full official policy on this matter here:

If you come across one of these ads, you can help us to take them down. Please visit the following URL and fill out the requested information - . The more detail you can give the better. Thanks for helping us improve the Android ecosystem!

Plazza » App » Tools » Clean Master (Speed Booster)
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What's New

1. Added Download Manager - an easy way to organize your downloaded and received files

2. Added Homescreen Showcase - share your wallpapers with other users

3. Added comment system to Antivirus and results page - communicate with other users


* Allows an application to get information about the currently or recently running tasks: a thumbnail representation of the tasks, what activities are running in it, etc.

* Allows an application to find out the space used by any package.

* Allows an application to clear the caches of all installed applications on the device.

* Allows an application to write to external storage

* Allows read only access to phone state.

* Allows applications to access information about Wi-Fi networks

* Allows applications to access information about networks

* Allows an application to open windows using the type TYPE_SYSTEM_ALERT, shown on top of all other applications.

* The restartPackage

* Allows applications to open network sockets.

* Allows mounting and unmounting file systems for removable storage.

* Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming

* Allows an application to collect battery statistics

* Allows an application to broadcast sticky intents.

* Allows access to the vibrator

* Allows access to the list of accounts in the Accounts Service

* Allows applications to change Wi-Fi connectivity state

* Allows applications to change network connectivity state

* Allows an application to read or write the system settings.

* Allows an application to expand or collapse the status bar.

* Required to be able to access the camera device.

* Allows an application to modify global audio settings

Additional information
September 16, 2017
19.74 MB
Current Version
Requires Android
Android 6.0
Offered By
Cheetah Mobile
Requires Rooted Device
Requires Data