Search on anything... fitness, replay value ...
  • on android
  • on iPhone
  • on iPad
  • on iPad+iPhone
  • on windows phone
  • on all devices
Share this on Twitter. Share on Google+ Share on Pinterest

Clean Master - Free Optimizer

FREE Low Maturity android
Cheetah Mobile
Overall Satisfaction click me 94
Its an excellent app for android system very very good.
The perfect cache cleaner and task killer with autometic killer.
Even if u clean apps ruuning or cache clean.
Great cleaning tool for phone and tablet simply awesome.
many Thanks to developers for making it free.
Do it what I said and ones the best antivirus application.
Best app thanks devs.
Very very useful app highly recommended :.
Fun & Engaging click me 95
Exellent just awesome clean your device with clean master.
Awesome performance by thr phone due to this app.
Usefulness click me 94
This app cleans everything unneeded off my phone.
nice and excellent and very usefull apps.
Very helpful application especially when my fone hang.
The moust helpfull app I have ever downloaded :.
Its very useful software for mobile.
It keeps everything running at top speed.
Ease of Use click me 96
Easy way to clean cache and memory in your phone.
Easy and effective cleaning app for caches and history.
Easy to use and very good at doing is job without much fuss.
Fast simple optimises helps the phone actually like a Dr.
Easy and smart.
Simple and sweet.
Reliability click me 60
I did a factory reset.
Security & Privacy click me 38
Terrific 1st security app for new device user.
Cellphone clean and security app.
Battery click me 71
Downloaded this in conjunction with this company's other app - Battery Doctor.
Works perfectly fine I love cheetah mobile apps like battery saver.
very poor battery saver.
Click blue bar for explanation of rating.
Simple, thorough, and safe, Clean Master is the world’s most downloaded Android optimization app designed to clean junk files, regain free storage, boost memory, enhance speed, and secure your device from malicious apps and vulnerabilities. Brought to you by Cheetah Mobile (formerly known as KS Mobile).

More than 200 million people worldwide use Clean Master to remove junk from their devices and to prevent malware infections. Clean Master improves performance by optimizing device memory, unclogging storage and offering security against viruses, trojans and malware. Developed by Cheetah Mobile, Clean Master is the world’s most reliable companion for Android devices!

Highlights of Clean Master - Optimization & Antivirus

☆ Thorough: 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 fifth time! , providing professional security protection. Scanning takes only 8 seconds, 500% faster than other paid antivirus apps.

Features of Clean Master- Optimization & Antivirus


Delete cache and residual files to reclaim memory and improve performance on your device and SD card.


Boost all games and running apps, free up memory (RAM) and speed up your device. Our One-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. Remove personal and sensitive information to protect your privacy.


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 App Picks lets you find useful apps that match your interests.

Stay connected!

Join our Facebook:

Follow us on Twitter:

Other apps from us on the Play Store

CM Security:

Battery Doctor (Battery Saver):

CM Browser:

CM Backup:


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, Hindi, Malay


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 known as 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!

Nice try it very nice working. found in 9 reviews
This is the best tool for optimizing phone memory and overall. found in 6 reviews
Smoothest and most efficient cleanup app ever. found in 7 reviews
I got rid of SO many games with a push of a button. found in 6 reviews
This is the best app I have ever downloaded on my cell phones. found in 3 reviews
Very helpful application especially when my fone hang. found in 7 reviews
Very good aplication and it does good things. found in 18 reviews
nice and excellent and very usefull apps. found in 10 reviews
The best optimizer available on play store. found in 5 reviews
The moust helpfull app I have ever downloaded :. found in 6 reviews
This is the best cleaner app on the market. found in 4 reviews
I've been using this app for about a month now and I must say. found in 2 reviews
you guys should make this app the app of the year 2014-2015. found in 3 reviews
The best in the world I seen. found in 7 reviews
makes a difference thank you. found in 5 reviews
Nice app for managing phone like managing memory rem. found in 3 reviews
Protect my phone by means dump files n application. found in 4 reviews
Awesome app ever seen before I use. found in 3 reviews
Its a very good App that keeps yo phone in check. found in 3 reviews
Terrific 1st security app for new device user. found in 5 reviews
A good app to clean junk files and clear ram. found in 375 reviews
Doesn't clean as much as u like it thought it would. found in 7 reviews
it doesnt clean properly and big disapontament is. found in 7 reviews
The tap boost shortcut doesn't appears in the home screen. found in 2 reviews
actually seriously slowed my phone down. found in 3 reviews
This app is helpful to clean junk data. found in 8 reviews
Seems like maybe a good app but still questionable to me. found in 3 reviews
New permissions allow camera to take photos without you knowing it. found in 5 reviews
keep asking me for a root permission. found in 4 reviews
Can't create shortcut for 1 tap boost when using Apex Launcher. found in 2 reviews
It deletes my all audio files. found in 2 reviews
Good but I don't see the difference of it making games faster. found in 3 reviews
My phone still sucks though. found in 3 reviews
Unable to move application data to external SD card. found in 6 reviews
Deleted my songs without notifying me. found in 2 reviews
Great for removing old or duplicate photos. found in 4 reviews
App wipe the music files as junk files. found in 4 reviews
It Deleted my game data. found in 5 reviews
Please let us decide if want root access in settings. found in 6 reviews
After several other apk files mysteriously vanished. found in 7 reviews
It deletes many important files unknowingly. found in 10 reviews
Cannot kill task and running applications. found in 9 reviews
It sucks it doesn't clean my phone like the old version. found in 7 reviews
Doesnt clean my internet history. found in 7 reviews
Clear search history is not working. found in 7 reviews
My external sd card is not working abd picture deleted. found in 6 reviews
This app sucks whenever i off notification toggle. found in 6 reviews
Its even worse than history eraser. found in 5 reviews
Why need all those new permissions. found in 5 reviews
Too many permissions. found in 5 reviews
Really messed up my music files. found in 4 reviews
You can't clear the browser history like other apps allow. found in 4 reviews
Need an update or will un install it for sure. found in 4 reviews
I would give five stars but ignore list is not working. found in 4 reviews
Will delete all your audio files without warning. found in 4 reviews
rated better for battery saver.   rated better for task killer.  
rated better for task manager.   rated better for auto kill.  
"Every phone I've owned ADVANCED TASK KILLER has been my go to."
"easy task killer and easy battery saver are my life savers."
"Saves battery more efficiantly then advanced task killer."
"switched from " advanced task killer " I like this much better."
"It improved my battery life and works great with easy task killer."
"Significant increase in battery life after using this advanced task killer app."
"One of the best antivirus app I have ever using."
"Just the best antivirus app for my & your smartphone :D."
"The best Antivirus app i have ever used for my android."
"It is the best antivirus app available present in the market."
"This is the Best Antivirus App for Free on Google Play."
"Best antivirus app out there & worth every dollar spent."
"When I try 2x battery saver it made my battery last 1."
"Simply the best battery saver SAMSUNG Galaxy Note II."
"Fine Combine with Easy Battery Saver and gain advanced battery control."
"Good battery saver as compared to other battery saver."
"Best battery saver I use 3 without charge."
"Excellent work by NQ easy battery saver."
11,569,111 total

This app is popular with:
  • Do it what I said and ones the best antivirus application.
  • Free up memory quickly on both Note phone and Tab Pro.
  • Live how easy it makes saving space.
  • The perfect cache cleaner and task killer with autometic killer.
  • "I don't understand why you need to take pictures."
Please tell us what:
  • You like
  • You didn’t like
  • Features you want improve
  • Ideas you might like to see
  • Wrong with this version
  • etc...
Email (optional):