Every running app shows you charts. None of them tells you what to do tomorrow. GraviRun is the coach that reads your data and answers back - built by a runner who got tired of guessing.
GraviRun started with a frustrated runner. Garmin on the wrist, a spreadsheet for mileage, and a rotating cast of training plans that never quite fit.
Garmin Coach gave a plan. It was fine. But it didn't adapt - not to a bad night's sleep, not to a twinge in an Achilles, not to a week traveling for work and missing two sessions. The plan just kept going, as if the runner were a robot on a schedule.
A human coach would've noticed. A good coach looks at your last run, asks how you feel, and adjusts. But human coaching starts around $150/month and goes up from there. For most runners, that's not a real option.
Then came ChatGPT. It knew running - periodization, VDOT, cardiac drift, taper protocols. It could explain threshold pace better than most articles you'd read. But it didn't know your running. It didn't know your paces, your history, your injuries, your goals. It was a brilliant coach with amnesia.
That's GraviRun. Not a new AI model. A running brain built around existing ones.
GraviRun uses large language models (like GPT-4) through your ChatGPT account, combined with running-specific coaching logic, data analysis, and training principles that we built. We didn't train a new AI model - we built the running brain around existing ones.
We won't pretend we invented a proprietary AI. We didn't. We use the best language models available - the same ones you can chat with right now - and we surround them with the structure, data, and coaching logic that makes them useful for runners specifically.
Garmin connectivity is live today - your activity data flows into that coaching logic through GraviRun's existing integration, so the AI won't just know running in general, it'll know yours. You connect once through Garmin's official sign-in flow and your synced activities, data-backed running reports, and pause/recovery insights are part of the conversation from then on.
GraviRun is self-funded and independently built. That's not a temporary state - it's a choice. It means we answer to runners, not to investors who need growth metrics.
Your running data is yours. We will never sell it, never share it with third parties for their marketing, and never use it to train ad models.
No venture capital, no advertising, no growth-at-all-costs. The product is the product - not your attention.
Built GDPR-first from day one. Double opt-in, clear retention, full data rights - access, export, correction, and deletion on request.
Garmin connectivity uses Garmin's official OAuth flow - we never ask for your password, and you can disconnect at any time.
There's no support team, no ticket queue, no "we'll get back to you in 3–5 business days." There's one person building this, and that same person reads every email.
That means two things. First, you'll talk to someone who actually understands running and actually built the product. Second, your feedback goes straight into the code - no layers of middle management between your idea and a fix.
It also means GraviRun grows deliberately. No feature gets shipped until it's right. Garmin connectivity is live today because it met that standard.
GraviRun is in early access. Register with your email, confirm it, sign in, and connect your Garmin to get started - one email, no spam, no selling your address.
Get Started →Or email support directly - yes, really.