This is unclear to the point of being nonsensical. What most people know about Robinhood is that it offers free trades. More tech-savvy people might know that they became household names because they encourage retail investors to treat investing like gambling.
I have no idea how that maps onto exercise. The only hint in your pitch is toward the end:
> Our goal is to make it as easy as possible to “deposit” your exercise each time you get active and watch your fitness compound over time.
OK, now I can maybe see why you brought up Robinhood, although I don't think of Robinhood as a place where people watch things compound. Mostly they just ride the day-trading rollercoaster.
But set that aside: what does it mean to deposit exercise? How can it compound over time? Isn't the whole point of exercising regularly that the effects fade?
I think you might have something here, but you probably need to market more the way Noom does. They talk about science-based behavioral modification that helps people succeed at dieting, even if they had always failed before. And they make a case that only a mobile app can really succeed at this behavioral change.