First of all, you should check for display settings. Here you can choose for a balanced image quality and in frame control. This will make sure that your device is able to cope up with the game load.

Turn on Adaptive smoothening; this will make sure the game is running smoothly on your smartphone. Enable this option when experiencing low device performance.
Next, you can turn off Dynamic shadows, Anti Aliasing, and refraction quality. These are heavy game features that put a lot of calculation load on your CPU, making the game freeze or crash most of the time.
Method 3: Close Background Apps
Most modern smartphones indeed have the capability to run multiple apps at once, i.e. multitasking feature. But sometimes, the background apps can interfere with the game’s progress. So it’s a good idea to close and remove all background apps and then run the game.
Method 4: Verify Game Permissions
Every game on your smartphone asks for basic permissions such as location, internet, storage, and presumably many others. If these permissions are not granted, the game will not work or crash sometimes. So check for the permissions the following way:
Open settings and navigate to Apps > Apps Manager section.

Here go to Apex Legends Mobile, and click on the Permissions tab.
Make sure all the permissions are granted. Once done, restart your phone and see if the issue persists.
Method 5: Disable Battery Saver Mode

Battery saver mode on your phone saves battery by limiting access to wifi, communication server,s location services, and countless others. But some services, such as location, internet, etc, are important for the game to run. So disabling the battery saver mode will help you to fix the Apex Legends Mobile Crashing problem.
Method 6: Check Storage Space

If your phone is low on storage, big games such as Apex Lenegds will not work, as the games require you to have a good buffer memory so you can play smoothly. Maybe you should try removing some unused files or apps to make sure space for the game and see if it helps.
Method 7: Clear Apex Legends Mobile cache
Apart from storage, all apps keep a local cache in storage which he’s to run the app faster. But in many cases, this cache file can get corrupted or damaged and may cause app crashing issues. So once you clear the cache file, issues will be resolved.
Open settings and navigate to Apps > Apps Manager section.

Here go to Apex Legends Mobile, click the Storage tab, and click the clear cache button.
Method 8: Uninstall Mod Apps or Scripts
For Android users, multiple apps or scrips in the market allow them to hamper the game in exchange for certain advantages. But such mod apps or scripts can also hamper the game’s functioning. It is recommended not to use such apps as they can result in an account ban or temporary game kick out.
Method 9: Update your Phone Firmware
Sometimes the issue is not the game but the old firmware version of your phone. Smartphones are upgrading fast, and manufacturers are releasing firmware updates every now and then. It’s important to keep your phone software up to date as it helps improve your phone’s performance.
So head to your device settings > about phone > software update menu and install the latest update available.
Method 10: Re-install the Game from an Official Source

If none of the above methods work for you, then it probably means that the game version you have installed is corrupted and some of the important game files are missing. Don’t worry, as you can easily fix it by re-installing the game from Appstore or Playstore. We recommend users to install the game via the official website or Playstore/Appstore only, as downloading it from other third-party websites may result in game crashing issues.
Conclusion
This brings us to the end of this guide for fixing Apex Legends Mobile Crashing on Android or iOS devices. Please note that any game performance is based on and optimized for the device that you are using. So make sure your device is fast and clutter-free from any virus or malware. Having a fast device with good CPU power and RAM will not lead to any game crashes in future.