The program does that now (I know cadence and I know wheel RPM...so the math is pretty simple from there) however it turns out to be nothing more than a party trick. I'm not sure if its useful in any way. Is there a reason you'd want that?

... I've had somebody come forward offering to discuss how some computer controlled variable resistance trainers work so support for those could be added, however I do not have the budget for buying $1000 trainers at the moment - not to mention avoiding buying those is half the reason I started writing this thing.

Graphics are important. It helps in stimulating the brain. I'm sure that you rather be staring at a monitor with nice graphics relevant to the type of training you are doing than stare at an empty wall. Graphics sure add a fun factor and kills the boredom of training indoors.

I dunno, that looks pretty advanced to me. The graphics aren't as shiny, but it's full featured and probably "good enough".

Of course I'll still be working on mine, and I'm starting the iPad version this month. My wahoo dongle showed up today.

Can't you just use the existing Garmin ANT+ stick and an iPad camera connection kit? At least for testing? I haven't done it, but someone suggested it to me. I think there might be issues with signing the app in that case.