Q&A for How to Delete Apps on Android

Two reasons: One, the programmers don't want you to delete them. They want you to upgrade to a better device when your current devices gets bogged down. Two, the programmers don't want customers deleting apps that may be part of the functionality of the device, then spend hours with customer service trying to fix it when they can just keep you from deleting them in the first place.

Right-click it and press delete, or go back to the app and sell it or delete it.

Try removing some photos or videos from your device, or some games you no longer use.

Try to stop most of the apps in the background. Then, if you are playing a game, try to put the graphics to minimum and put the battery saver on.

Try to clear the cache (in Settings > Storage > Cached Data > Clear Cache) or deleting some of your useless files, thumbnails (under DCIM folder) or apps/games. If it is not possible to backup your WhatsApp, then uninstall and reinstall the latest from the Play Store.

Install an app called Kingroot, it removes the requirement to have been rooted, it will try to acquire root access for you (it may fail the first time but after a few tries it always eventually succeeds for my devices). It has an uninstall tool that removes pre-installed apps. Removes Hangout on my device easily and has options to permanently delete the app (otherwise keeps it in recycle bin). However, Hangouts returns if you factory reset your device.

Try Kingroot app, it tries to achieve root access for you (so no need for PC) and always has an uninstall tool.