How to Free Up Space on iPhone Without Jailbreak

If you have an iPhone and your space is limited, and you're wondering how to free up some space without affecting any of the important information you have, like apps you use or photos and videos you don't want to delete - you have the answer right here.
I'll concentrate on two ways:

1) This is an AppStore app that deletes the junk files from your iPhone that you don't need. It's called Battery Doctor. I know the name of the app confuses you, but it has a hidden option that you can activate - it's called "Junk". Watch the video for details on install and the actual process.

2) Second option is by using a third party app that is installed via Cydia Impactor. No jailbreak is needed. The app is well known, and the name is iCleaner Pro. It's yet a very simple way to do it so don't give up on this. Just follow the simple video instructions below.

I would love to hear back from you guys. I need to know how it worked for you, and how much of free space you gained.
Also, if you know of some other ways to free up some space - make sure you let me know in the comment section below.