Simulator vs device game speed

Hi, i am new to corona and trying to create something awesome with it and i have pretty much something done already, but i have a problem.

I have created a simple prototype of my game concept, when you are flying a rocket. My mechanics for this are as much as you turn the rocket to the left or right it speed up in according direction. And my problem is that when i am testing it on simulator its working great, speed is just like i want it to be, but when i test it on my galaxy tax 2 its like 10x faster. Its also happening when i run my prototype for the first time i open my project in corona, but when i relaunch it its normal again.

I think this may have something with delta time but i am not sure of it because i am using it to calculate the speed.

Thanks.

Generaly device is always slower then computer so probably some errors in code

Yeah, it might be, but how is that even possible i get different values on simulator and device, and why is simulator sped up on the first launch of my project? Is that possible that this is caused by these errors too?

Generaly device is always slower then computer so probably some errors in code

Yeah, it might be, but how is that even possible i get different values on simulator and device, and why is simulator sped up on the first launch of my project? Is that possible that this is caused by these errors too?