It's usually recommended to simply uninstall the applications from your mobile phone to increase its performance. I am against using a desktop application to delete files that might have a big impact on your system stability. If you want to have the phone cleaned, uninstall all the apps and backup the photos and videos then connect the phone to the PC and install iTunes. From the iTunes, click your device and press on Restore. This will bring the mobile to its factory defaults. After this process, install only the apps you need and that's it.
