Does your Android phone kill apps in the background just when you need them most?You leave your banking app open, your smartwatch loses connection, messages don't arrive on time, or an alarm fails because the system closed it on its own. You're not alone: Android is designed to maximize battery and memory usage, but it often gets too clever and ends up closing apps that are critical for you.
The good news is that You have considerable control over which apps can continue running in the background and which cannot.However, you need to be familiar with battery settings, developer options, the specifics of each interface (Samsung, Xiaomi, Realme, OPPO, etc.), and some extra tricks to stop Android from closing things it shouldn't, without affecting your phone's performance or battery life.
Why does Android close important apps in the background?
There are two main culprits behind these automatic closures: RAM management and battery saving policiesAndroid constantly monitors which apps you use, how long they've been inactive, and how much free memory is left; if the system needs resources or detects that an application is "not a priority," it can close it without asking.
This behavior has its logic: Closing processes you're not using helps your phone run more smoothly, consume less energy, and run cooler.The problem arises when Android or the manufacturer's interface becomes too aggressive and ends up blocking apps you need to be active: messaging, home automation, smartwatch or fitness tracker, health apps, alarms, continuous location tracking, etc.
Advantages and disadvantages of closing background apps
It's not all bad: Allowing the system to close background applications with some freedom has many positive effectsFewer open processes mean less energy consumption, less CPU and RAM usage, and less risk of overheating, which is key in phones with modest hardware or already worn-out batteries.
When there are fewer active apps, it's also noticeable that The device responds faster, menus open sooner, and animations are smoother.Furthermore, some malicious or poorly designed apps take advantage of background activity to collect data or consume resources without you noticing, so Android closing them can even be a security measure.
The flip side is that Certain applications need to run in the background to provide basic functionsReal-time notifications, email synchronization, fitness tracking, car connectivity, smart home control, GPS tracking, reminders, and alarms. If the system disables them, you lose alerts, you lose information, and sometimes the connected device even stops working.
Which apps are usually critical in the background?
It's important to be clear about which applications You should protect against Android automatic shutdownsThis group typically includes all apps that rely on continuous processes or reliable notifications: WhatsApp, Telegram, Signal, email apps, tasks, calendars with reminders, banking apps with security alerts, etc.
You should also take special care apps that maintain a connection with other devices or services: smartwatches and bracelets, headphones, connected cars, security cameras, home automation sensors, smart locks, health or fitness monitoring apps that track your steps or sleep.
At the same time, it's a good idea to check what other apps are running in the background without contributing much: games you barely use, social networks you don't need to be active all the time, or tools you only open occasionally.These are perfect candidates for Android to close them, restrict their activity, or even suspend them.
How can I tell which apps are running in the background?
Before touching anything, it's a good idea See which apps are actually active and how many resources they consume.Android offers several ways to do this, although the exact path may vary slightly depending on your phone brand and system version.
A fairly comprehensive way is to activate first Developer OptionsGo to Settings > About phone and tap "Build number" seven times in a row until you see the message that you are now a developer. Then go to Settings > System > Developer options > Running services to see which apps and services are running and how much RAM they are using.
Another, slightly simpler option is to check the Applications section within the system settingsBy going to Settings > Applications (or “Applications and notifications” in some interfaces) you can view the complete list, see battery usage, memory consumption, and even if they are running in the background excessively, using application managers such as app manager and other managers.
When the problem lies with the memory or the cache
On phones with little RAM, it is common that The system is forced to close apps simply because there isn't enough room for everything at once.In these cases, it doesn't matter what you do: if you overload the phone with heavy games, social networks, browsing and music, Android will end up taking some from the memory so that it doesn't crash.
If you notice a particular app constantly closing, this can help. clear your cache and, in some cases, your dataand it is advisable to use apps to diagnose hardware To confirm the problem, go to Settings > Apps > See all > select the problematic app > Storage and tap "Clear cache". If the errors persist and you don't mind reconfiguring it, you can also tap "Clear data" to start fresh with that app.
The role of battery saving and adaptive battery
One of the main reasons why Android is aggressive towards apps is power saving modeWhen you activate it, the system goes all out: it reduces background activity, cuts down on synchronizations, and further shortens the lifespan of apps you're not using, which often results in notifications arriving late or not at all.
If you're having a lot of problems with essential apps closing, first check if you have battery saving mode or “ultra” modes activatedGo to Settings > Battery (or “Device care”, “Device maintenance”, etc.) and disable these extreme profiles if you want important apps to breathe a little more.
In many modern versions you will also see the option to adaptive battery or smart battery managerThis system learns your habits and automatically limits the apps you rarely use, leaving the ones you open daily more unrestricted. It's a very useful feature, but if you notice that an important app stops sending notifications, check in Settings > Battery > Adaptive Battery (or similar) which apps have been restricted and remove it from that list, or try something else. apps to optimize Android.
Disable battery optimization for essential apps
In addition to the general power saving mode, Android includes an application-level battery optimization systemBy default, almost all apps are optimized, meaning the system can reduce their background activity to extend battery life. For certain critical apps, this should be disabled.
To protect a specific application, go to Settings> Applications Select the app you're interested in. Within it, tap on "Battery" or "Battery Usage" and look for an option like "Battery Optimization," "Battery Management," or something similar. You'll see several modes: choose "No Restrictions," "Don't Optimize," or "Allow Background Activity," depending on how your device manufacturer names it.
This adjustment implies that That application will no longer be closed so readily to save energy.So it's normal for usage to increase slightly. Ideally, you should only apply this to a few essential apps: your main messaging app, smartwatch or fitness tracker, car app, smart home apps, alarms, or any other tool you rely on daily.
Remove restrictions on aggressive layers: Samsung, Xiaomi, and others
Some manufacturers are particularly zealous with the battery and apply extra management layers on top of "pure" AndroidSamsung (One UI), Xiaomi, Redmi, POCO (MIUI), realme (realme UI), and OPPO (ColorOS) all have their own background app control systems.
On Samsung phones, for example, in addition to the battery settings per app, there is a section for “Suspension applications” and “Deep suspension applications”If an app is on the deep list, it will have almost no permission to run in the background. Go to Settings > Device maintenance or Device care > Battery and access the Always-on apps management to review what the system has added and remove any important apps.
On many Samsung models, a very effective trick is combine multitasking lock with "Unrestricted" modeOpen the multitasking menu, tap the icon of the app you don't want to close, select "Keep open" (you'll see a blue padlock), and then, from the same menu, go to "App info" > "Battery" and choose "Unrestricted." This minimizes the likelihood of One UI closing it automatically.
On Xiaomi, Redmi or POCO, as well as OPPO and realme, you can also pin apps to the multitasking screenOpen the recent apps view, press and hold the thumbnail of the app you want to protect or tap its icon, and select the lock or similar option that indicates it's locked. This way, even if you delete all other recent apps, that one will remain safe.
Block apps from closing in multitasking
Locking an app in multitasking is a very visual and quick way to Inform the system that this application should not leave memory unless strictly necessaryIt is usually available in most modern skins, although the icon or gesture varies slightly between brands.
In practice, the procedure consists of Open multitasking with the corresponding gesture or button.To find the app you want to protect, press and hold it or tap its icon and select the lock option, "Keep open," "Lock," "Pin," or similar; if you prefer to organize and protect access, try with Smart folders to organize your appsWhen you reopen multitasking, you'll see a small symbol (usually a padlock) indicating that it's protected.
Note that Every time you install new apps that you want to keep running in the background, you should review these settings.Often we get used to something working well, add a new app that also requires background permissions, and after a few days, we start to notice that something is wrong without really knowing why.
Disable apps in deep sleep and unused app suspension
In addition to power-saving modes, many layers integrate features that They automatically suspend or put to sleep applications that you haven't opened in a while.On Samsung, for example, you'll see options like "Put unused apps to sleep" within the Battery menu; on other manufacturers it appears with similar names.
These features are very useful for keeping old apps that you don't even remember installing under control, but if the system mistakenly adds an app to that list that you actually need running in the backgroundNotification and disconnection problems will begin. Therefore, it's a good idea to check that section from time to time and wake any critical apps from sleep mode.
Advanced control from Developer Options
If you want to go a step further, there are settings in Developer Options that They allow you to thoroughly modify Android's behavior with background processesWe have already seen how to activate this menu by pressing the build number seven times within About phone.
Once inside, you can look for the option “Limit background processes”There, you can tell the system to allow only 1, 2, 3, or 4 background processes, or even none at all. This is extremely aggressive: it might be useful if you want to maximize battery life on an older phone, but at the cost of disabling virtually all background functions.
On some devices, the option called “Background usage check” In the Apps section, if this option is enabled for certain apps, Android will force them to close more easily to save energy. If you see any of your favorite apps there, disable them to prevent them from being automatically closed.
External tools: Greenify and other management apps
If the standard options fall short, there are specialized applications that They help you hibernate and control what each app does in the background.The best known for years has been Greenify, which allows you to "sleep" applications when you are not using them so that they do not consume resources without having to close them completely.
Greenify works even without root access, although To take advantage of all its advanced features, you need to have your device rooted.Another very powerful tool (for advanced users) is Titanium Backup, which also requires root access and allows you to freeze apps, hibernate them, and make complete system backups—useful if you like to fine-tune your settings.
These types of utilities are very practical, but It is not advisable to overuse them or install them carelessly.Android has greatly improved its memory and battery management in recent years; in many cases, a good configuration of the native settings is more than enough to keep background apps under control without relying on external solutions. If you're also concerned about permission management, learn how to manage app permissions to avoid granting unnecessary permissions.
When is it appropriate to force a closure and when is it not?
Although it may seem otherwise, Constantly closing all recent apps isn't always a good ideaAndroid is designed to manage what to keep in memory and what not to; if you manually close an app you use often, the system will have to relaunch it from scratch the next time, using more battery and time than if it had retrieved it from RAM.
Forcing an application to close makes sense when That app is clearly malfunctioning; it's either frozen or consuming an excessive amount of resources.In that case, go to Settings > Apps > select the app > “Force stop” and confirm. This will stop it completely and it won't restart until you open it manually.
On the other hand, it is not recommended at all. constantly closing messaging apps, email, music streaming apps, or other tools you need in the backgroundOn the contrary: these are precisely the ones that should be left alone, having aggressive optimizations disabled and, if necessary, being blocked from multitasking so that they continue to function properly.
Background app management and privacy
This whole issue of background apps doesn't just affect battery life or performance, it also It has a lot to do with your privacy and securityCertain apps take advantage of their permissions to access your location, microphone, contacts, or device usage data even when you're not using them.
To minimize risks, before disabling battery restrictions for an app, double-check everything. What permissions has he been granted and are they consistent with what he does?Go to Settings > Apps > Permissions and remove anything that doesn't make sense: a simple game doesn't need your precise location, a flashlight shouldn't request access to the microphone or contacts, and a photo editor doesn't need to read your SMS messages. You can also install apps to block access if you want to add an extra layer of control.
You can also use the menu of Privacy and Permissions Manager This allows you to review, by category, who has access to the camera, location, microphone, or contacts. In addition, many Android interfaces let you suspend apps you're not using, which not only saves battery but also reduces the likelihood of these apps continuing to collect data behind your back.
A useful resource: the website Don't Kill My App
If you want to know how aggressive your manufacturer is with background apps, there is a project called “Don't Kill My App” that ranks brands according to their policiesThere you'll see that some companies, like Samsung or certain Chinese manufacturers, are much stricter with background processes than Google is with its Pixel phones.
Consulting this information is useful for Understanding why two phones with the same version of Android behave so differentlyIn addition, the website usually offers specific instructions for each brand, with the exact menus you need to tap to prevent the apps you consider essential in your daily life from closing.
Properly managing background apps allows you to find the right balance between battery life, performance, privacy, and convenience. If you carefully configure which apps are running in the background, you can achieve this. exempt from optimizationBy blocking apps that shouldn't be closed in multitasking, checking the lists of suspended apps, and using developer options wisely, your Android will be much less aggressive with what's important without becoming a battery hog. Share the information so other users know about the topic.
