The gradient you see on the screen in FulGaz is the exact gradient we send to your trainer. That applies for every second of every ride. So if it says 2% on the screen - that’s what got sent to the trainer.
We also send your weight, drag number and the rolling resistance among other things. From there, the trainer works out the resistance.
If it feels way too hard, it’s probable you have one of the settings wrong. Sometimes it’s something as simple as a person thinking they’ve added their weight in pounds but they’re actually using KG.
Double check you’ve got all the settings correct and things should feel really close. I usually advise against it, but it might even be worth deleting FulGaz and reinstalling it so you can guarantee everything is set to it’s default.
If all your settings are correct in FulGaz, we recommend doing a spindown before riding again. This is usually the cause of "it doesn't feel right" issues.
IMPORTANT NOTE ON SPINDOWNS AND CALIBRATION
Once you have done a spindown, it's really important to then quit that app before you use FulGaz. If you don't do this, your trainer will still be paired to that app and FulGaz will not work. In some cases you will also need to "forget" the trainer in the utility app.