Space Master

Contains adsIn-app purchases
22.9K reviews
Content rating
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About this app

Does your phone often slow down during use?

The Clean & Boost app offers powerful features to speed up your phone, clean junk files, boost RAM and easily optimize all parts of your phone.

This app also helps keeps your apps private using a fingerprint-based AppLock.

The Space Master app offers powerful features to speed up your phone,
clean junk files, boost RAM and easily optimise all parts of your
phone. The reliable Caller ID feature can identify who you’re speaking
to before you answer the call or dial a number.

Key Features

Junk File Cleaner
Removes junk files such as system and app cache, useless APK files & temp files and free's up storage space on your device.

App Lock
Clean & Boost will satisfy your need for privacy with the App Lock feature. App Lock lets you lock your installed apps using a PIN & your secure fingerprint.

RAM Booster
Kills background applications & activities. Cleans RAM and improves performance.

CPU Cooler
Analyzes CPU usage and stops apps that cause overheating to cool down your phone.

Cache Cleaner
Cache Cleaner gives you ultimate control over your device cache. Delete cache with one tap and boost performance.

Call Notification Alert
This app will allow you to easily clean your RAM, CPU or memory usage after each call – keeping your phone clean all day everyday. You will never forget to optimize your phone again!

Junk Notification Cleaner
Clean & Boost also lets you block all junk notifications and delete with the one-touch notification cleaner

Junk Photo Cleaner
It is a simple & easy-to-use feature which helps you remove duplicate/junk photos from your phone.

Batch Uninstaller
Lets you simply select multiple apps which you do not want to keep on your phone and uninstall them in one go.

Software Update Check
This feature will help you keep your favorite apps installed & system apps updated. Get reminded after each phone call and update your apps instantly.

Kindly email us with any bugs/problems/feature requests which you want this app, you can share your feedback on
Updated on
Oct 22, 2021

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
This app may collect these data types
Photos and videos, App activity and 2 others
Data is encrypted in transit
Data can’t be deleted
22.9K reviews
A Google user
March 5, 2020
I'm going to rate this one star. The former version of this app may have had ads, but I couldn't close THIS VERSION without literally a dozen ads getting thrown in my face. That's an absurd feature, one the former version didn't have. Too bad it was removed from the store, I regret uninstalling it. I understand the need for ads, since it provides extra revenue, but this is not the right way to go about it. You lose potential customers with this, not gain them. Fix it, for your own sake.
32 people found this review helpful
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ApplicationNextG Dev
October 20, 2021
Dear User, we are sorry for the inconvenience. We want to give you better user experience. Could you give us the screenshots of Ads that disturb you most? You can email us at
A Google user
April 2, 2020
No longer cleans junk files. So crammed with ads, it no longer actually cleans junk files. I tried three times after trying to navigate around ads. Every time I hit the back button, was just continual loop of different ads. This app serves no useful purpose. I had used it and recommended it for years, but permanently uninstalling it now.
544 people found this review helpful
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ApplicationNextG Dev
April 29, 2020
Dear user, Thanks for supporting us and we are sorry for Ads. We will improve in the future and we will try to keep the Ads from interfering. Please let us know if you have any questions. Thank you.
A Google user
March 25, 2020
What is this? I have this app on my other phones and tablet. It can be stored on your SD card and has a notification cleaner. It is not on my list of apps, even though it is installed. Explanation required! I also have a subscription for the light version. Uninstalled. Heap of garbage now. I have found a better one with less adds and it's free! Keep it!
358 people found this review helpful
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