As far as I can tell, the app won't do anything until you sign up for the free trial (which, if you forget, will convert to paid). There's a modal subscription sheet which won't go away until you choose the free trial. Frankly, that's not a good first impression for an app that's advertised as "free". Give me some functionality, or quit listing it as "free".

As for the rest, meh, it's okay. If you're 'merican, you will find a few globalization issues (date format and weight in Kg). I bump the system text size up a notch (old eyes), and I see text overflow issues.

It does allow you to enter workouts that will sync to Apple Watch. That's a nice one. Problem is, like every other 3rd party app that has "build a workout" functionality, it doesn't do power alerts. I don't use heart rate or pace for workouts anymore, it's all power-based. And so far, only the stock Apple workout builder will do power alerts. I don't know if it's just not exposed in the API or what.

And finally, I don't know where those heart rate zones came from, but they are way off (way too high).

This app might be handy for those that have previously only been using the stock Apple Health/Fitness apps. But for $2/month, I just don't see the value add over the Garmin or Training Peaks (a paid app), or even HealthFit (free, and recommended). If the app were even a one-time $10, I'd probably spring for it. But a recurring subscription? Nope, there's nothing about this app that I'd consider continuously pouring money into it. I deleted it, and cancelled the free trial.

I would highly recommend that the dev ditch the subscription model and make it a one-time purchase.