I transferred .apk app file to phone, but lags like crazy and zoom in and out very quick

I made an app, nothing very fancy, a pretty simple app. But when I transferred the app to my phone for real situation testing instead of debugging, it took more than 2 minutes for it to load to the next page. The page just has a couple buttons on it, nothing more. On other peoples devices, it would zoom in and out of the page very quickly, to the point where you couldn’t do anything on the phone. Is this a problem with Kodular, or the devices I tested it on?

I want the app to be able to flow through the pages smoothly without any lag.

Instead it lags and glitches.

If anyone knows how to solve this issue, I would appreciate help.

Please read this and then provide much more info.