How to clear cache of all apps?

I have one on my mac and it works fine. It helps to erase caches stored in apps and remove other unwanted data to optimize storage in iPhone. It didn't hurt my iPhone or hijack my iPhone. You could check giveumore ios cleaner review, it lists several.

It is up to the application developer to give you such an option for their app, if that even applies to the way their application works. Applications like Facebook don't have this option but can be accomplished by signing out and back in. Other applications have data in them that you're storing like journals, photo storage apps, etc. You can delete documents in these apps to free up space. Beyond that contacting the developer or deleting and reinstall is all you can do.

Settings > General > Storage & iCloud Usage > Manage Storage to see which applications are using the most storage.

Check the storage on your iPhone, iPad, and iPod touch - Apple Support

If you're like many people your photos and videos probably take up most the space on your device. This might help you manage that space.

Manage your photo and video storage - Apple Support

Hi, somebody here? I also want to clear app cache on my iPhone to free up storage. I noticed that some desktop third-party software state that they could quickly clear app caches on iPhone without uninstall apps. Is this kind of tool safe to download and use?

Definitely not, Apple doesn't allow apps to interact with other apps for the most part and then in only very specific ways.