It is totally fine to clear the cache on your Android phone on a regular basis. The cache is a bunch of temporary files that apps store so they can load things faster. When you get rid of these files, you do not lose any of your stuff, like pictures, messages, or the details you use to log in. Clearing the cache is actually a thing because it helps get rid of clutter on your phone, makes it work better, and fixes small problems, with apps like when they crash or take forever to load. The only thing is, the time you open an app after clearing the cache, it might take a little longer because the app has to rebuild those files. So it is an idea to do this every now and then, but you do not need to do it every single day. Clearing the cache on your Android phone is an idea, and it can really help your Android phone work better.