In the modern age, a couple of gigabytes of storage space have no meaning. Mobile device manufacturers push for the sky when it comes to offering storage space on board the device itself. Users are always concerned about how much space they use on the device. So here is how to check used and available on board storage space on your iPhone, iPad and iPod touch.
1. Launch the Settings.app on your iOS device
2. Tap on General
3. Now Tap on Usage
You will now be displayed information regarding storage available and used on the device. Furthermore, if you scroll down you will be able to view how much space precisely an installed app is taking up on your iPhone, iPad and iPod touch.