If you don’t have enough space, you can try deleting some unnecessary data or files from your phone. The lack of these may slow your game down. Before you start the Roblox app on your mobile, make sure you have enough storage and RAM.
However, if you suspect that the number of FPS is causing problems with the app, here’s what you can try to fix it. Roblox diagnostics are available in the Roblox Studio, which you can run on some operating systems, including smartphones.
Unfortunately, it’s not possible to see your frame rate while playing on your iPhone. If your Frames Per Second rate is too low, that may cause all the motion within Roblox to be unsteady and slow. If you’re having issues with loading the app, you may need to check your FPS. These mobile devices typically provide a 60 FPS frame rate, which should be enough to run your game smoothly. Roblox is compatible with smartphones, so you can use it on your iPhone. How to View Your FPS on Roblox on an iPhone