Check app storage usage on iOS
Smartphones only have a limited amount of space, so you need to make sure you’re checking how much each app takes up, especially if you need to delete a few to make room.
To do so, head to the Settings app on iOS, and then choose the “general” tab. Then, choose the usage option.
There, the app will give you a run-down of exactly how much usage each app is using, complete to the megabyte.