How to uninstall apps from iPhone or iOS device?
Deleting apps from iPhone or iOS device is simple and can be done one of the following ways:
Tap and wiggle:
After you tap and hold any icon, the apps wiggle, and an (x) appears that lets you delete them. Just tap and hold any app icon until all the icons start wiggling. You will notice that many of them have a little (x). The ones without an (x) are default apps that are part of iOS and cannot be deleted. Tap the (x), then tap Delete in the dialog. Note that doing so deletes not only the app, but also all of its data.
Tap Settings > General > Usage, then look at the apps that display at the top of the window in the Storage section. This list is useful, because it shows how much storage each app actually uses. That may include just the app itself or the app plus all its data. Tap on an app's name then tap Delete App.
The above techniques are great if you want to delete apps from specific devices but still retain them in your iTunes library. If you want to nuke them entirely, go to iTunes and choose your Apps library. Click an app to select it and then press the Delete key. Another dialogue will ask you if you want to keep the app or move it to the trash. You can remove the apps from your iTunes library, but keep them in a folder on your Mac just in case.
In iTunes Apps > Updates window you will see a list of new versions of apps that you can download when an app has been updated. To delete an app right-click on app's icon and choose Delete. This deletes the app itself from your iTunes library, and also removes the update notification. The next time you sync your iOS devices, the apps you have deleted from your iTunes library will be removed from your devices.