I am not aware of any issues with fueling up a m.fuelly.com.
I just tested it and added a fuelup without issue.
Also, we are not doing anything to stop resizing the full website on mobile devices. I just browsed to www.fuelly.com in Chrome on Android and was able to resize the website as needed.
Stupidity on my part. I thought the "Fuelly Web App" by Fuelly, LLC on Google Play was by you. I was going to reinstall the app when I read that it wasn't affiliated with Fuelly.com.
So, I just dropped a bookmark straight to the mobile fuel-up link onto one of my home screens, and all is well.
Thanks for looking into it. Apologies for the incorrect accusation.