When my iPhone starts to get short of space I go looking for things delete. Besides the obvious excess of photos I look at apps I don't use or haven't used in some time.
It always makes more sense to target apps that use more memory space so I go to: Settings> General> Storage & iCloud usage> to the upper section for onboard storage - Manage Storage. There you get a list of all your apps, starting from the biggest memory use and descending to the least. If you look at one particular app it shows you how much total memory is being used. Then if you tap it it gives you a breakdown of the actual app size and the additional "documents & data" space the app uses. Where this gets interesting is noticing an app that is using a lot more space than seems reasonable. You discover that the app is using a whole lot of memory space for backups and documents. Here you can go to the app and check if some of this memory space can be freed up.
The most interesting finds are those apps where you find no place to release the accumulated saved memory space, apps that shouldn't have any documents & data at all. I have discovered a few apps that have memory leak problems. Deleting and reinstalling the app clears the space. But with additional usage this memory space builds up again. Then I contact the developer to find out what's going on. They are generally mystified at first but it points to a bug in the app concerning the releasing of memory after you use the app. They appreciate hearing about the problem so they can fix it.
A recent example: Simply HDR had 714 MB of documents & data but shouldn't. After deleting and reinstalling the app it goes down to 4K but after using the app for several pictures it has crept up again to 114MB.
It always makes more sense to target apps that use more memory space so I go to: Settings> General> Storage & iCloud usage> to the upper section for onboard storage - Manage Storage. There you get a list of all your apps, starting from the biggest memory use and descending to the least. If you look at one particular app it shows you how much total memory is being used. Then if you tap it it gives you a breakdown of the actual app size and the additional "documents & data" space the app uses. Where this gets interesting is noticing an app that is using a lot more space than seems reasonable. You discover that the app is using a whole lot of memory space for backups and documents. Here you can go to the app and check if some of this memory space can be freed up.
The most interesting finds are those apps where you find no place to release the accumulated saved memory space, apps that shouldn't have any documents & data at all. I have discovered a few apps that have memory leak problems. Deleting and reinstalling the app clears the space. But with additional usage this memory space builds up again. Then I contact the developer to find out what's going on. They are generally mystified at first but it points to a bug in the app concerning the releasing of memory after you use the app. They appreciate hearing about the problem so they can fix it.
A recent example: Simply HDR had 714 MB of documents & data but shouldn't. After deleting and reinstalling the app it goes down to 4K but after using the app for several pictures it has crept up again to 114MB.