Our story
We didn't build Koa because we thought AI was cool. We built it because personal training is broken — it costs $200+ a month and most people will never be able to afford it.
A good personal trainer in the US charges $60–$150 per session. Three sessions a week — which is what most coaches recommend — runs $720 to $1,800 per month. That's over $21,000 per year. For most people, that's a house payment, not a fitness plan.
So what happens? People try fitness apps instead. They download something, set it up, use it for two weeks, and forget it exists. The app doesn't text them. It doesn't follow up. It doesn't care if they skipped leg day. The discipline has to come entirely from the user — and for most people, that's just not sustainable.
We'd seen this cycle play out too many times. Smart, motivated people who genuinely wanted to get fit — stuck because the tools were either too expensive or too passive. There was nothing in the middle that actually worked.
Tyler Calvert has been lifting seriously since high school, playing travel baseball and competing in sport through college. He knows what it feels like to train with real coaching — and what it feels like to train without it. The gap between those two experiences is enormous.
After years in business building digital products, he kept coming back to the same frustration: why hasn't anyone built a genuinely personalized fitness coach that normal people can actually afford? The technology existed. The exercise science existed. The communication channel — SMS — was already on everyone's phone. It just hadn't been put together the right way.
Koa started with a simple idea: what if your coach just texted you? Not a push notification from an app. A text. From a coach who knew your history, remembered your injuries, and had a plan built specifically for you. That's the product we set out to build.
There's a lot of AI fitness content that's just vibes. Workouts generated from whatever sounds reasonable, with no grounding in actual exercise science. That's not what Koa is.
Koa's programming is built on principles that have decades of research behind them: progressive overload (systematically increasing training demand over time), periodization (cycling phases of volume and intensity), and RPE-based training (rating perceived exertion to auto-regulate load based on daily readiness). These aren't buzzwords — they're the methods that actual strength coaches use with elite athletes.
The difference is that Koa applies these principles at $8.33/month instead of $200+/month. The AI handles the programming decisions, the progressive overload calculations, and the real-time adjustments — so you get coaching that's actually calibrated to your performance, not a template with your name on it.
Make great coaching accessible to everyone — not just people who can afford $1,500/month.
A personal trainer changes outcomes. We've seen it. When someone has a coach who actually knows them, checks in consistently, and builds programming that adapts to their life — they stick with it. They make real progress. Their relationship with fitness changes for good.
That shouldn't be a luxury. Koa exists to make it the default.
"We built the AI trainer we wished we had."
— Tyler Calvert, Co-Founder
7-day free trial. No credit card required. Your coach texts you tomorrow morning.
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