One big advantage compared to other apps would be that a glide app takes up no memory on phone. Could you confirm if this would be true?
This is not true.
Ok. Since I see only a link added to the Home screen, I thought, it is just like a web app, with only the URL link on the phone. Does the memory used by the app increase along with usage, like other apps such as whatsapp?
I think there is some caching which will use some storage on the phone. I would say my app is pretty data heavy, but takes a relatively small amount of space on the phone (less than 1mb). I don’t have a lot of images, but it still seems considerably smaller than most regular apps.