Memory cleanup: how to choose the app that frees up space on your phone.
Put Rodrigo Pereira
Choosing a cleaner starts with understanding what it analyzes. Some apps organize shared files; others use accessibility to automate actions in the settings. None, simply by being in the store, receive unrestricted access to all the data on your phone. Compare the features, permissions, and the list that appears before deleting.
The fact sheets for CCleaner, AVG Cleaner, SD Maid 2/SE, and Google Files offer distinct approaches to freeing up storage. The analysis below uses these descriptions to separate file organization, automation, and paid features. The application should help you identify unnecessary data and review your selection before committing.
Android and iPhone already have their own storage management tools, so the specialized app needs to justify its installation by doing what the system doesn't: identifying which app each leftover file came from, finding duplicate photos, and displaying the complete list before tapping "Delete." This guide is about choosing the app; the step-by-step instructions on where the space disappears are in [the relevant section/resource]. A guide to where your phone storage space disappears and how to free it up..
What the cleaner does inside
Android's restrictions on data from other apps have changed across versions. Cleaning shared files, deleting your own cache, and automating screens are different operations. A cleaner may only offer some of these functions, and its behavior depends on the device and the permissions granted.
CCleaner and AVG Cleaner describe the use of accessibility in certain automation functions; SD Maid 2/SE also documents an optional use for automating actions. Read the request and confirm the corresponding function. You may prefer tools that solve your task with less access, without disabling legitimate assistive system features.
The five criteria for choosing the app
1. It shows the list before deleting.
A useful cleaner opens a screen with each item marked, its size, and the source app, and waits for your "Confirm". The one that makes a number spin on the screen ("2.3 GB freed!") without a review button is hiding what it deleted. The SD Maid 2/SE Swiper, the AVG Cleaner swipe, and the Files recommendations follow the right logic: one file at a time, your decision.
2. What permissions does it request on the first screen?
Accessibility and comprehensive file management are permissions that deserve attention. The usefulness of each depends on the chosen function and the Android version. Do not authorize automatically: check the developer's explanation and use the app with limited access only when that is sufficient to organize your files.
3. Full-screen ad is a sign to leave.
A paid ad in the footer benefits the developer; a full-screen ad when unlocking the phone or opening another app is what Google considers intrusive and has already removed famous cleaner apps from the store. If the app has created shortcuts on the home screen or appears outside its own window, it has become a pest, and the solution is to remove it. Step-by-step guide to removing viruses from your Android and iPhone mobile phone..
4. How does the app make money?
CCleaner and AVG Cleaner both have "Contains ads" and "In-app purchases" labels on their Play Store listings: the free version displays ads, while the paid version removes them. SD Maid 2/SE doesn't show ads but charges for some advanced features. Google Files has neither. The more ads, the more "speed up" buttons are invented to generate impressions.
5. Who signed it and when was it updated?
Check the developer, update history, and compatibility with your device in the app store. A recent update date alone doesn't guarantee quality; an old update date also doesn't prove that the app is deleting files incorrectly. Use these indicators along with descriptions of the app's functions and required permissions.
Comparison in the datasheet: CCleaner, AVG Cleaner, SD Maid 2/SE and Google Files
The table only uses what each app's listing on the Play Store currently shows; where the official description doesn't mention a feature, the cell says "not mentioned".
| Item | CCleaner | AVG Cleaner | SD Maid 2/SE | Google Files |
|---|---|---|---|---|
| Developer | Piriform | AVG Mobile | darken | Google LLC |
| Note on Play | 4.7 (3.07 million reviews) | 4.8 (1.96 mi) | 4.5 (9.5 thousand) | 4.7 (9.02 mi) |
| Downloads | 100 mi+ | 100 mi+ | 1 mi+ | 5 bi+ |
| Adverts | Contains advertisements | Contains advertisements | No ads | No ads |
| Paid version | In-app purchases | In-app purchases | Paid advanced features | It does not have |
| Accessibility permission | Yes, to stop background apps. | Yes, to stop background apps. | Optional, to clear caches. | It does not quote. |
| Duplicate or similar photos | It does not quote. | Yes, with slip-up review. | Yes (Deduplicator) | Yes (duplicates) |
| Residual data from uninstalled apps | “"Obsolete and residual files"” | It does not quote. | Yes, tell me which app it came from. | It does not quote. |
| Differential | Uninstall multiple apps at once | Analyzer of poor quality photos | Compress photos without deleting them (Media Squeeze) | Quick Share and backup to Drive |
CCleaner: the most well-known name, with a button to skip.
CCleaner inherits the fame of the desktop version and delivers the basics: it removes obsolete and residual files, lists apps you haven't opened in a while, and uninstalls several at once, which usually frees up more space than any cache. Expect ads in the free version and a subscription offer on first use. What to skip: the button that "stops background apps," the only feature that requires accessibility; force-closing apps only makes Android reopen everything afterward.
Remove residual files, uninstall multiple apps at once, and show which apps are taking up the most space.
AVG Cleaner: the photo analyzer that decides by swiping.
AVG Cleaner has the highest rating in the group, 4.8 out of nearly 2 million reviews, and the feature that saves the most space for those who take a lot of photos: the photo analyzer, which separates blurry, dark, and duplicate images and lets you decide with a gesture, left to delete, right to keep.
It carries the same advertising and purchase labels as CCleaner and asks for the same accessibility permission, repeating the phrase without changing a single comma: they are both from the same group, Avast. Install one of the two, depending on what you accumulate the most of: photos, AVG; forgotten apps, CCleaner.
Find duplicate or poor-quality photos and clean up unnecessary files with a photo-by-photo swipe review.
SD Maid 2/SE: Waste analysis and file organization
SD Maid 2/SE is the successor to the classic SD Maid, rewritten for the current Android version, and is the app on the list that feels more like a tool than a showcase. The Junk Finder finds folders left by uninstalled apps and names the owner of each one; the App Cleaner finds thumbnails, trash, and offline caches; the Deduplicator searches for identical or similar files; the Storage Analyzer shows what occupies each gigabyte, including the SD card.
The description says the app contains no ads, that some features require a paid upgrade, and that accessibility is optional, only used to tap buttons when clearing caches. Media Squeeze compresses photos with adjustable quality to save space without deleting anything, a feature none of the other three offer.
Locates remnants of uninstalled apps, duplicates, and hidden caches, without ads and with a review before deletion.
Google Files: organization and cleanup recommendations
Look for Google Files among your device's apps. Its cleanup area may show recommendations such as large files, duplicates, and downloads. Open each suggestion to see what will be removed. The available categories depend on the version, the files found, and the permissions granted.
It doesn't name the app that owns a residual file (that's SD Maid's job) nor does it judge photo quality (that's AVG's job), but it does offer Quick Share, backup to Google Drive or SD card, and a folder with its own PIN. For most people, Files alone resolves the full storage warning.
Google's file manager with cleanup recommendations, duplicate search, and Drive backup, all ad-free.
Products that left the store: Clean Master and DU Speed Booster
Two names that dominated the category for years no longer exist on the Play Store: I opened the address for each one during the research and both returned a 404 error. They survive on APK sites, and therefore the recommendation is short: do not install them.
- Clean Master (package com.cleanmaster.mguard): not available on the Play Store. An APK with that name today could have been created by anyone, with anything inside.
- DU Speed Booster (package com.dianxinos.optimizer.duplay): outside of Play, same situation.
- Tool offered only by a third-party website: Do not install a copy from an unknown source to replace an app that is missing from the store. Play Protect can scan software from other sources, but this does not guarantee the integrity of every file available on the internet.
If one of them is still on your phone, uninstall it before installing another cleaner in its place.
The two buttons you can ignore: “speed up” and “free up RAM”
Every app cleaner with ads has a "speed up" button that closes open apps and displays a number of megabytes "freed up." Android manages working memory automatically: apps you use frequently are intentionally put on hold, so you can return with a single tap, and the system closes idle apps when needed. Force-closing everything requires reloading each app from scratch, and the processor works harder. Anyone who wants longer battery life can find settings that significantly impact this. Battery saving guide with what consumes the charge.
The same logic applies to slowness: a slow phone is rarely that way because of cache issues, but rather because storage is almost full, an update is pending, or a heavy app is running all the time. This diagnosis is in the Guide to cleaning apps to speed up your phone.. The rule remains the same: avoid installing too many apps that promise to speed up your phone, because some consume even more memory and have the opposite effect.
What Android itself already does without any app:
- Settings > Storage shows what occupies each gigabyte and has a button to clear cache per application.
- Settings > Apps > “Unused” lists apps that haven't been opened in months, with the option to archive them.
- Google Photos, with backup enabled, offers "Free up space" to delete photos already in the cloud from your device.
- The gallery and Google Photos have their own trash bin: what you delete stays there for a while before disappearing.
How to use the cleaner without deleting what matters.
The four apps by default only mark cache, residual, and duplicate files, but AVG's swipe and SD Maid's Swiper delve into photo folders, and Files suggests deleting downloads and message media. The routine below leaves the decision up to you.
- Before the first scan, check if Google Photos backup is turned on.
- Open each category individually instead of tapping “Clear all.” Cache and residual files can go unchecked; “large files,” “downloads,” and “message media” deserve to be examined item by item.
- Deny accessibility permission when it appears; large app caches are then removed from the system, in three taps per app.
- Next, open Settings > Storage and compare it to the previous number. If the difference is only a few megabytes, the storage space is being used elsewhere, most often in WhatsApp videos.
Common questions
Do I need to pay to use a cleaning app?
The price and included features vary by app. Google Files offers its functions without a subscription, while other tools combine free and paid features. Check if the desired task is included before activating a trial or plan; don't assume that every cleaning function is free in all products.
Can cleaning apps delete important files?
An incorrect selection can delete personal files, and not every operation offers a recycle bin. Open the list, check examples, and preserve a copy before removing photos, documents, or conversations. Having backup enabled doesn't guarantee that all items are already copied or that a deletion can be undone.
Do I need to grant accessibility permission for the cleaner to work?
The need for accessibility depends on the function and the tool. Some automations require this access; other tasks may only need file permissions. Consult the documentation for the installed version and preferably grant only the access necessary for the task you have chosen.
Is there a cleaner for iPhones?
Not in that format: iOS doesn't allow one app to read another's files. The path is Settings > General > iPhone Storage, which lists each app by size and offers "Uninstall App," which deletes the program and saves the data. "Cleaning" apps on the App Store are limited to duplicate photos and repeated contacts.
How often should I run the cleaning cycle?
When the storage warning appears or the camera refuses to record, the cache is rebuilt in a few days, so clearing it every week only makes the phone work to recreate it. A monthly check of duplicates and downloads is what provides lasting space.
Start by reviewing your storage and check if Google Files can handle the task. If you need another tool, compare the documented features and review the permissions. After cleaning, check the free space and open the files you decided to keep to check the organization.
