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Clean Master (Boost & AppLock)

FREE Everyone android
Cheetah Mobile
Overall Satisfaction click me 97
It's an awesome and superb cache cleaner and speed booster.
Does a great job cleaning and speeding up my new phone.
so helpfull to my phone thanks for this app.
The best optimizer available on play store.
Totally recommended this app.
The best in the world I seen.
Fun & Engaging click me 96
Its the awesome cleaner I recommend all to use it.
It's the most awesome cleaner.
Awesome thanks for the application.
Usefulness click me 96
This app cleans everything unneeded off my phone.
nice and excellent and very usefull apps.
saves time and boosts phone functioning.
It keeps everything running at top speed.
Really helpful application to optimize my device memory.
The moust helpfull app I have ever downloaded :.
Using since one year very nice & useful software.
Production Values click me 99
excellent all round and very clear and easy interface.
Quick and clean easy interface.
Ease of Use click me 93
Does the job perfectly and a very clean and simple app.
Good clean and simple app that works.
excellent all round and very clear and easy interface.
Quick and clean easy interface.
Fast simple optimises helps the phone actually like a Dr.
It Was Fast Simple And Great.
Reliability click me 68
I did a factory reset.
before installing this app i faced a lot of problems with my phone.
Haven't gotten any problems with my phone when I got the app.
Ads not Intrusive click me 53
So much ads and spam.
Security & Privacy click me 63
I use this in conjunction with their CM Security app.
Terrific 1st security app for new device user.
Battery click me 85
Cleans your system great my battery lasts alot longer now.
battery lasts longer and music doesn't skip.
Downloaded this in conjunction with this company's other app - Battery Doctor.
Had to uninstall it and only keep battery doctor.
Click blue bar for explanation of rating.
The World's Most Trusted Android Optimizer, Speed Booster and Free Anti-Virus app, Clean Master Helps Accelerate and Clean Up Over 400 Million Phones! It Also Provides Real-time Protection With the #1 Antivirus Engine, and Secures Your Private Data With the AppLock Function.

Have you ever encounter the following problems?

Your device has become laggy and freezes all the time
You don't have enough space to take more pictures or install apps
Your battery has started draining quicker than ever
Your device overheats and needs to cool down
You want to lock your photos, gallery and messages from prying eyes and nosy friends


► AppLock
AppLock can lock Facebook, SMS, Contacts, Gallery, or any other apps you choose. With AppLock, only you can see the photos you protect. Guarding your privacy is easier than ever!

► Duplicate Photo Remover

Clean Master can identify similar photos & blurry photos automatically, giving you the choice to keep or delete them. It's just like a gallery doctor for your device.


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. 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.


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


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. 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.

► Game Booster

Automatically improve your game speeds by 30%+ when launching games.

► Autostart Manager

Prevent apps from autostarting to speed up your device. (Root needed for this feature)


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

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This app helps me keep my phone running in tip top shape. found in 16 reviews
I got rid of SO many games with a push of a button. found in 8 reviews
The best optimizer available on play store. found in 8 reviews
Smoothest and most efficient cleanup app ever. found in 8 reviews
This is the best tool for optimizing phone memory and overall. found in 7 reviews
Super service and mind blowing app. found in 12 reviews
Protect my phone by means dump files n application. found in 7 reviews
you guys should make this app the app of the year 2014-2015. found in 4 reviews
Get your device running smooth as silk with this app. found in 5 reviews
Very good aplication and it does good things. found in 24 reviews
Makes a difference in performance. found in 8 reviews
love CM Backup & Boost. found in 7 reviews
Awesome app ever seen before I use. found in 4 reviews
The moust helpfull app I have ever downloaded :. found in 8 reviews
Allows you to either deep clean or quick clean your phone. found in 6 reviews
Time saver and battery saver at the same time. found in 6 reviews
The best in the world I seen. found in 7 reviews
Worked wonders for lagginess in my mobile. found in 6 reviews
this works like magic. found in 7 reviews
A very good and handy app. found in 4 reviews
It's nice cleans junk files but asks to update everyday. found in 650 reviews
Really works with cleaning up junk my phone tends to accumulate. found in 39 reviews
Don't even need anti virus if u have this app. found in 68 reviews
it doesnt clean properly and big disapontament is. found in 8 reviews
Excellent but contains too much ads. found in 7 reviews
Great app for removing junk files n much more n optimization. found in 8 reviews
This app is helpful to clean junk data. found in 11 reviews
and not committing to closing running apps/ force stop. found in 6 reviews
Just hate how i have constant notifications to clean my phone. found in 6 reviews
actually seriously slowed my phone down. found in 6 reviews
Delete junk data within a second. found in 14 reviews
It asks many permissions idont want to give that many permissions. found in 7 reviews
Please let us decide if want root access in settings. found in 8 reviews
The app sucks right now. found in 6 reviews
keep asking me for a root permission. found in 5 reviews
New permissions allow camera to take photos without you knowing it. found in 5 reviews
Can't create shortcut for 1 tap boost when using Apex Launcher. found in 3 reviews
You can't clear the browser history like other apps allow. found in 5 reviews
Please reduce the app size and data. found in 6 reviews
But i need help on moving apps to SD card which it failed. found in 45 reviews
you go to app manager and nothing changes anywhere. found in 32 reviews
Recent updates lock screens and force ads onto home screen. found in 27 reviews
But t notification toggle doesn't work in t latest update. found in 22 reviews
App lock is missing. found in 12 reviews
It's annoying that it keep deleting my apk file. found in 12 reviews
My external sd card is not working abd picture deleted. found in 9 reviews
I would give five stars but ignore list is not working. found in 9 reviews
The autostart manager can't get root access. found in 8 reviews
Doesnt clean my internet history. found in 8 reviews
Clear search history is not working. found in 7 reviews
Too many permissions. found in 7 reviews
This app wiped my SD card and pictures and videos. found in 7 reviews
Kill tasks at screen turn off doesn't work in Lollipop. found in 7 reviews
So much ads and spam. found in 7 reviews
Y this app need permission to access my phone calls. found in 6 reviews
Slowed my phone down like hell & deleted some of my very important files. found in 6 reviews
The latest update says invalid package file will not install. found in 6 reviews
This app sucks whenever i off notification toggle. found in 6 reviews
rated better for file manager.   rated better for task manager.  
rated better for game data.   rated better for flash light.  
"This is the best task killer app I have ever installed."
"This advanced task killer is defenitly advanced it works every time."
"fast task killer which greatly impoves my phone's speed."
"Saves battery more efficiantly then advanced task killer."
"This task killer allows my phone to run better."
"I ended up using advanced task killer for the most part."
"One of the best antivirus apps I've come across maybe the best."
"Awesome antivirus apps makes ur smartphone rocket."
"Just the best antivirus app for my & your smartphone :D."
"Best antivirus app out there & worth every dollar spent."
"The best Antivirus app i have ever used for my android."
"The best antivirus app ever for android phones."
"This is the best battery saver app ive ever download Go you."
"Easy battery saver is nice app save your battery for android."
"This is by far the best battery saver app i have ever used."
"When I try 2x battery saver it made my battery last 1."
"Best battery saver add sound alarm for full recharge."
"Best battery saver app with plenty of options for the power user."
25,433,927 total

This app is popular with:
  • THE BEST app for cleaning your phone & saving space.
  • especially those who play games alot.
  • It's an awesome and superb cache cleaner and speed booster.
  • saves time and boosts phone functioning.
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