How to clear Android RAM and speed up your smartphone

Modern smartphones are becoming more and more productive, but over time, even top models begin to “think” when switching between applications. The main reason for this phenomenon lies in the full random access memory (RAM). When RAM is busy with background processes, the system has no resources left to quickly launch new apps, which leads to lags and freezing of the interface.

Cleaning RAM is not just a way to free up space, but a necessary preventive measure for stable operation of the device. Unlike internal memory, where your photos and files are stored, RAM works with data in real time. If you notice that your phone is heating up or draining quickly, perhaps culprit (the culprit) is hidden in incorrectly running processes that are “eating up” resources.

In this article we will look at not only standard cleaning methods through the settings, but also advanced techniques available through the developer menu. You will learn how to properly manage startup and why the habitual closing of applications with a swipe does not always give the desired effect. Let's start with the simplest and safest methods that can be applied right now.

Standard system tools and multitasking menu

The most obvious way to free up resources is to use built-in Android functions. Most manufacturers, such as Samsung, Xiaomi or Huaweiintegrate their own optimization utilities into the shell. Usually they are located in the Settings → Device Maintenance or Securitysection. Pressing the “Clear” button forcibly terminates background processes, freeing up memory cells.

However, it is worth understanding the difference between completely ending a process and minimizing it. When you swipe an application from the multitasking menu, the system does not always completely unload it from RAM. Many services, especially instant messengers or email clients, automatically restart to maintain notifications. This is normal system behavior aimed at user comfort.

⚠️ Attention: Constantly forcing all applications to be cleared through the multitasking menu can lead to increased battery consumption. The system has to reload data into memory, which consumes more energy than storing a minimized application in the background.

To quickly check the current memory state, you can use the engineering menu or the built-in task manager. On some devices, you just need to hold down the Home button or a special navigation key to see the amount of free memory. If the free volume is less than 15-20% of the total, the system will begin to artificially slow down to prevent crashes.

Managing startup and background processes

One of the main reasons for memory clogging is uncontrolled startup of applications. After installing new software, you often give it permission to run in the background, which you later forget about. To regain control over the situation, you need to go to advanced settings and manually restrict rights for unnecessary apps. This is especially true for games and heavy editors that should not hang in the background 24/7.

The limiting process is as follows: go to Settings → Applications, select a specific app and find the “Battery” or “Charge Consumption” item. Here you can select the “Restricted” or “Prohibit running in the background” mode. After this procedure, the application will launch only when you open its icon on the desktop.

• 🚀 Social networks: often consume the most resources due to constant feed updates and preloading media.
• 🎮 Games: rarely require work in the background, they can be safely limited completely after the end of the session.
• 🛒 Marketplaces: can run in the background to track orders, but this is not critical for instant notifications.

It is also worth paying attention to system services that are not displayed in the regular list of applications. Some manufacturers allow you to disable pre-installed software (bloatware), which cannot be removed in the standard way. Disabling such services through the app menu frees up a significant amount of RAMthat was previously wasted.

Using Developer Mode for Deep Cleaning

For advanced users, Android provides access to a hidden menu where you can manage processes at a deeper level. To activate this mode, you need to go to Settings → About phone and quickly click on the “Build number” item 7 times. After this, a new section will appear in the main menu For developers.

This section contains the extremely useful “Keep active” function. If you enable this option, the system will destroy any application immediately after you minimize it. This is a radical method that guarantees the maximum amount of free RAM, but requires getting used to, since when you return to the application, it will be downloaded again, and not open instantly.

Settings → For developers → Keep active (ON)

Another important parameter is “Background process limit”. By default, the system itself decides how many applications to keep in memory. You can manually set a limit, for example, "No more than 2 processes." This will force the phone to keep in active memory only the current application and one previous one, automatically unloading the rest.

⚠️ Attention: Changing settings in the developer menu may affect the stability of some services. It is not recommended to set the background process limit to "0" or "None" as this may interfere with Android system services.

What are cached processes?

Cache processes are applications that have been closed by the user, but their data is temporarily stored in memory for quick re-launch. The system automatically deletes them when the memory is needed for other tasks.

Clearing the application cache and system data

Although the cache is technically stored in the internal memory, its excess indirectly affects the performance of the RAM. Applications that have a huge cache are slower to index and require more CPU resources to manage files, putting a strain on the entire system. Regularly clearing the cache helps maintain the “hygiene” of the device.

Cleaning can be done both for individual applications and globally. In the storage settings of most smartphones there is a “Clear cache” button for all applications at once. However, a more effective method is selective cleaning for those apps that you rarely use, but which have accumulated gigabytes of temporary files (for example, browsers or social network clients).

Data type	What is it	Is it safe to delete	Impact on speed
Application cache	Temporary files for quick access	✅ Yes, completely	High (frees up space)
Application data	Settings, logins, saves	❌ No (resets the application)	Medium (resets settings)
Residual files	Folders from remote apps	✅ Yes	Low (space only)

After mass clearing the cache, it is recommended to reboot the device. This will allow the system to correctly redistribute freed resources and re-index files. If you use third-party cleaning utilities, be careful: they often delete the cache too aggressively, forcing applications to re-download images and data, which increases traffic.

Reducing the load by disabling animation

The visual beauty of the Android interface is provided by many animations: opening windows, transitions between menus, minimizing applications. All of these effects require CPU processing power and (take up) some RAM for frame buffering. On older or budget devices, disabling animation can give a noticeable increase in speed.

Let's return to the menu For developers. Find three options: Window Animation, Transition Animation, and Animation Duration. By default they are set to 1x. Change them to 0.5x or completely disable them (Without animation). Visually, the interface will become more “jerky”, but the responsiveness of buttons and transitions will increase significantly.

This method does not physically clear memory, but reduces the load on the rendering subsystem, freeing up RAM resources for more important tasks. Users of budget models Redmi or Realme often note that after reducing the animation scale, the phone begins to work as if it had just been bought.

Radical measures: resetting settings and flashing

If software methods do not help and the phone continues to slow down even after cleaning, the problem may lie in deep system errors or data fragmentation. In this case, the only effective solution is a full reset to factory settings. This procedure completely clears the internal memory and RAMreturning the device to its out-of-the-box state.

Before performing a reset, it is critical to back up all data, as the process will delete all photos, contacts and installed applications. The reset is done through the menu Settings → System → Reset settings. After turning on, the phone will work as quickly as possible, since there will be no garbage in the memory from previous use.

⚠️ Attention: Make sure that the battery charge is at least 50% before starting the reset. Interrupting the process by turning off the phone can damage the system partition and make it impossible to load the OS.

In some cases, it is not a full reset that helps, but flashing the device to a lighter version of Android or custom firmware. Stock shells from manufacturers often contain a lot of unnecessary software. Installing “pure” Android (for example, through the line Pixel or custom builds) radically changes the approach to memory management, making it more efficient.

Why does the phone start to slow down again after a reset?

After restoring the backup, you return the same “garbage”, settings and heavy applications that caused problems to your phone earlier. It is recommended to set up the phone as new, installing only the necessary software.

Frequently asked questions (FAQ)

Do I need to install applications to clear memory (Clean Master and analogues)?

In most cases, no. Modern versions of Android (starting from 9.0) do an excellent job of managing memory on their own. Third-party “cleaners” often work in the background themselves, consuming resources and displaying advertisements. The system's built-in tools are usually enough to maintain order.

Why, after clearing the memory, does it immediately fill up again?

This is a feature of Android. The system strives to use all available RAM to cache frequently used applications so that they open faster. Empty RAM in Android is considered useless. You should only worry if the phone starts to slow down.

Does the fullness of the internal memory affect the operation of the RAM?

Yes, it does indirectly. If the internal memory is full (less than 1 GB left), the system has no place to create swap files and temporary buffers. This leads to the fact that the RAM cannot effectively dump data there, and overall performance drops.

Is it possible to increase RAM on Android programmatically?

It is impossible to physically increase the RAM, since the chips are soldered into the board. However, some manufacturers (Xiaomi, Samsung, Realme) offer a “Virtual Memory” (RAM Plus) function, which uses part of the internal memory as an addition to the RAM. This helps keep more applications in the background, but works slower than real RAM.

Which applications eat up RAM the most?

The leaders in consumption are usually social networks (Facebook, Instagram), instant messengers with a lot of chats and heavy 3D games. Browsers with many open tabs can also take up hundreds of megabytes of memory. It is recommended to periodically check the statistics in the developer settings.