Jah2Goated

You was right, it was a mistake in my options, fov in aim trainer sync 119,8. So trainer provides only option 120 fov, you can’t make 120,7, and that’s why you’ve written that fov in apex sync should be 89.25. And now it feels ok, apex sync fov 89.25 sens 1.25, trainer sync fov 120 sens 4.17 and apex game fov 90 sens 1.25.
thank you

Strange, tested it now (with scripts) and they are exactly the same. Technically you should set the apex sync FOV to 89.25, but I don't think that's what throwing you off.

It is mathematically correct, but you would sit a lot closer to a 10" than a 20", so if you're first going to calculate the sensitivity based on monitor size you should also consider how much of your field of view the monitor covers. For instance going from 24" to 27" will be about the same angular size if you move 3" back. If I'm playing on a 120" projector screen and scale the sensitivity accordingly just based on size I think I'll struggle
Now incorporating distance to the monitor could be a feature if calculating with monitor size, it's something to consider.