Inserting an FPS counter (frames per second) on screen I see in a desktop browser I get about 60fps but on an iPhone, no matter what I do, it is always 20fps.
Is this a fixed limitation or can something be done about it ?
test using code to draw a text object with the value;
ToString(round(1/TimeDelta()))
Some smartphone have a variable refresh rates.
It can be true if you are low battery, didn’t yet interact with the phone, you are in a battery saver mode, or if the setting of your screen use a low refresh rate.
That is something to change on your phone in the settings.
By curiosity, what is your iPhone + version?
Also in GDevelop you can edit the minimum and max fps.
If you set both to zero, the fps are not limited.