• Clean Master (Boost&Antivirus) 1
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Clean Master (Boost&Antivirus)

The most trusted and safe Android optimizer, junk file cleaner, speed booster, battery saver and free anti-virus app with over 740 million mobiles. Clean Master(Boost & AppLock) helps accelerate Ram and clean up junk and cache files! Clean Master(Boost & AppLock) also provides real-time protection with the #1 antivirus engine, and secures private data with AppLock function.
Have you ever encounter the following problems?◆Your device is lagging 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&messages from prying eyes and noisy friends

Clean Master(Boost&App-lock)Highlights:

★ JUNK FILE CLEANING Delete junk files, residual files and cache to free up storage, boost speed and improve the performance of your Android device and SD card. Keep your phone clean and fast.
★ MEMORY BOOST Boost and speed up your Android phone, free up memory (RAM) and save more battery. Our 1 Tap Boost and Game Boost features make it easy to optimize directly from your home screen.
★ NOTIFICATION CLEANER Prevent disturb and annoying notifications from showing in notification toggle. Make your phone stay away from trash notifications!
★ CPU COOLER Cool down temperature and reduce CPU usage by stopping overheating apps and make your battery last longer!
★ ANTIVIRUS 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.

★ APPLOCKAppLock can lock Facebook, SMS, Contacts, Gallery, or any other apps you choose. Protect your privacy with your own AppLock PIN code or pattern. Guarding your privacy is easier than ever!
★ BATTERY SAVERAnalyze battery status and hibernate running apps to save power, extend your battery life in 1 tap with Battery Saver.☆ iSWIPEiSwipe gives you quick access to other apps and tools without having to go back to your home screen.☆ APP MANAGER Uninstall unwanted apps or bloatware and back up important ones. Some rooted devices will be able to move apps to the SD card.☆ GAME BOOSTERAutomatically improve your game speeds by 30%+ when launching games.

☆ CHARGE MASTER Charge Master shows estimated remaining charge time and protects your device in charging. You can also receive notification while charging.

☆ PRIVATE BROWSING Private Browsing can clean your browsing history immediately, keep the browse data spy from others.

Clean Master, the best android cleaner & booster, safe guard for Android phones, and works great for quick clean up and antivirus protection. Wish you enjoy the highest performance of your phone after downloading and using our app.

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: http://www.cmcm.com/about/promotion-policy.htmlIf you come across one of these ads, you can help us take them down. Please send the link and screenshots of the ad to [email protected]. Much appreciate.

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Reviews (23)

A. G. u. Nov 7, 2018     

I have used this app for a few years. But the recent intrusive ads that are sometimes impossible to immediately get rid of (no "X" on the screen anywhere as well as making the home buttons disappear, which means I actually had to look at the stupid ad to find it) which makes me resort to just restarting the phone. It's really not worth the trouble anymore. I'll find something else.

Ahm. Z. Sep 24, 2018     

This used to be one of the best apps for cleaning your mobile device but as of recently it has started giving random pop ups while using other apps. You can't turn them off in the settings and they're annoying as hell. It keeps saying to "boost RAM" or notifying about things like that while using YouTube and it's become unbearable. It also gives a pop-up for when your battery is low or when it's full, something all mobile devices already do on their own. Honestly this app is more trouble than it's worth.

Kat. A. Mar 1, 2019     

This app is a very good app, it cleans junk files well and does a good job of securing the device for free (with ads), however, what's annoying is with the latest version of the app, it doesn't matter what I do, it keeps adding a shortcut to my home screen (almost every day I have to delete this short cut). That should not be happening. That is very annoying.

Dav. A. May 7, 2019     

I was having terrible problems with my phone. I wasn't receiving any notifications, even though all phone settings were correct. Basically I was missing a bunch of very important things. Thought it was a Verizon problem, so I spent hours on the phone with them. I also spent hours upon hours online reading threads, blogs, watching videos, etc on how to get notifications/badges back. Called Samsung, and they had me uninstall this app. My phone was back to normal immediately. Do not install!

Art. Jun 14, 2019     

Been using this for years on various phones. Phones always run smoother after a cleaning. In my opinion, better than the cleaners that actually come with the phones. Helps spots overheating pretty fast and helps cool the phone down. Anti-virus scan is fairly quick and runs deep into the system. Ads are becoming a little too intrusive though. Often hijacking my phone for up to 30 seconds. Would be nice if you could tone it down a little more.

A. G. u. Oct 25, 2018     

I've been using this app for years, and really liked it. I even recommended to friends to use. Over the last several months I began getting ad pop up's on my phone when trying to read my texts or make a phone call. I find it annoying, but understand and accept getting ad pop up's while in an app or playing a game (the app developer's need to make money) but I should never be subjected to ads while trying to read my texts, make a phone call or look at my photos, it's like they've hijacked my phone and began sending ads all the time! It was driving me nuts. I finally had to delete the app and the ads pop up's finally stopped.

Wan. S. Aug 26, 2019     

Most of the functions it has work really well. (Battery boosting, junk cleaning, etc.) However, the app constantly barrages you with push notifications, and often for functions you don't even want to use either. (For example, I'd prefer not uninstalling a 7 mb app I haven't used it in a week to save space, even though I haven't even used half of my storage yet.) Because of this, it is more advisable to download the app once in a while, run its various cleaners, and then uninstall it again.

Nic. W. Sep 30, 2018     

This app could be great, however the constant pop ups, the advertisements cluttering it, the constant notifications that continued even after I turned them off, made this app very frustrating to use. I have had this phone (Note 9) 3 days, the app for 2, and it created such a problem I almost returned it. I may be willing to try it again in the future but only if all the bloat has been streamlined.

Viv. S. Dec 12, 2018     

The iSwipe feature is not working properly after the last 2-3 updates. It used to appear on the screen and it was easier/faster to switch between apps, but now it disappears after a few minutes, so I'm obliged to open Clean Master's app to activate it, again and again, and it happens all day long. Please fix this issue, this feature is very useful and it is an easier and faster way to access and switch between application's, but no so much when I'm, basically, obliged to open Clean Master's app dozens of times during the day, in order to activate it, again and again. Thanks in advance.

Kel. W. Apr 28, 2019     

I've been using this for years. And it's pretty convenient. Especially being able to uninstall a bunch of apps at once. But lately it has been opening on its own to do stuff when I unlock my phone and slowing my phone waaaaaaay down. I didnt realize how much until i uninstalled it. Opening anything on my phone started feeling like the dial up days. Plus it's gotten more and more ad heavy. I hate to, but i need to go elsewhere so that my phone can function again.

kim. p. Sep 19, 2018     

I used this app for a number of years with little issue. Then, about a month or so ago, my phone started acting up, lagged, froze, keyboard would freeze and lag, black screen, white screens, etc. Then about a week ago, my phone started occasionally restarting itself and was also heating up. Went through a lot of things and nothing helped. Then I remembered that I had updated Clean Master. Sorry guys, but guess this app was the culprit. I uninstalled and now my phone is working right again.

Aut. H. Feb 21, 2019     

2 WORDS..."MIND BLOWN"...My phone was running so slow, and my battery would die so quick, that i was almost to the point of just throwing it in the junk drawer and buying a new one. Then my friend told me she had experienced the same issues a few months back with her phone as well, and went on to tell me about this app, and how it was able to fix it in a matter of minutes (and all for FREE) I honestly didnt believe her, until right now!!! i will recommend this app for EVERYONE from now on end!!!

All. Feb 12, 2020     

I used this on previous versions of my Damsung phones with no problem. Decided a few days ago to add it to my Samsung 10 that I bought last fall. Can only describe the results as a shitshow. It arbitrarily decided to turn off programs that I actually use because they were 'too old'. It deleted entire programs, including my samsung notes, which was full of my notes! That I wanted! Turned off notifications from my ring cameras. Made it impossible to send or receive pictures. I'm still trying to fx

Tod. H. Dec 2, 2018     

Opens Full Screen Video Advertisements there is no way to exit until complete. Then when it's done it is deceptive. You touch the "x" to close the add, but instead it opens a SECOND Video Advertisements that you also cannot exit until it finishes. I won't say the tool doesn't work, but cleaning up RAM and Cache files should not CAUSE FRUSTRATION! Especially when there are other apps that do the same without the headache.

Jar. T. Nov 27, 2018     

As far as I can tell this app is fairly useless. One of it's functions can be used to clean out cached data yet I go to my storage settings immediately afterwards and still see the same amount of cached data remaining. Furthermore, the app is claimed to help be able to speed up your phone though it has never done anything to help the funtionality of my phone. I have no way of telling if it's antivirus scans are actually doing anything because all it tells me is to mess around with installing other apps or with my phone settings. Find a different app this one just isn't worth the ads

Jen. W. Jun 24, 2019     

I had never used an app like this until it came pre-installed in a government phone. I quickly learned the value of having it, so I was worried when switching phones and carriers (I thought this app might be exclusive to Qlink). I was relieved to see it available in Google Play for Android phones. Installed immediately. I use it all the time. Adds are annoying, but I have the free version, so I'm just grateful to have all the features on this app.

Mar. S. Jun 20, 2019     

Lots of ads but i've been using it for years. The largest issue is that if you click into the app and exit immediately you get stuck on a loading screen that overlays onto your device and stays there until you restart your phone. This happens even when the "draw over apps" setting is disabled for clean master in the settings. apart from the extreme amount of ads and notifications (can be disabled) its works pretty well

Sah. H. Sep 15, 2019     

It was working nice, but the updated one is not working properly! It has three main problems: 1. It shows inappropriate ads. I tried to lock them but it was not possible. 2. After sometimes it keeps open the apps, though I select the option that after exiting any apps, that should be locked instantly. Sometimes it works but not always. 3. Everytime showing the notifications, that system needs to be cleaned. which really disturb and waste the time beside making the system slow.

And. A. Nov 16, 2018     

Works a designed, initially, with a minimum of ads. Then you begin to get bombarded with ads. I understand the "necessity" of ads and "free" software, but ads upon ads is going a bit too far. When the ads overpower the game boost, it is time to uninstall. When the ads take more time to show and go through their speil than it does for the app to perform its function, it is time to uninstall. Tired of the constant bombardment of ads is the reason for the low rating and the uninstall.

Che. N. Feb 4, 2019     

Extremely useful app with several functions rolled into one. I extensively use the junk cleaner, battery saver, cool master, app lock and RAM boost and it really helps. Ads can be a little annoying but I understand why they're there. Also, please look into the type of ads as sometimes I'm shown ads that are downright sleazy. No complaints apart from this.

Edw. Sep 23, 2018     

Newsflash. Not everyone wants all these shortcuts on the home page. Get rid of the freaking full page ads after every action! You've already got ads in it. Stop the freaking full page ones especially those that show up 3 times before you can get rid of them. And the ones that lie after the cool down where it says you need to look at the ad for 60 seconds for optimum effect. Bull!

Ben. L. Apr 27, 2019     

Would be great, but the ads are overkill, doesn't make me want to purchase to upgrade even if it's a top market cleaner. Should let you try out and run at full potential for a lengthy period to determine if you want the app and find functionality for it. This way you can determine if you would like to purchase, after all those ads I didn't want to purchase I just wanted off my phone and nothing to do with them or anything they advertised.

A. G. u. Nov 3, 2018     

Too many Ad pop ups! We realize the need for them, but they get annoying, when they even have Pop-ups when you are using other functions of your phone (like calling etc.) Unless you turn off notifications! With so many users using this app, you would think they have enough money to pay for the the upkeep, without bombarding with useless Ads, (which BTW are almost the same ones over and over again)!