About AIFitnessAPI
AIFitnessAPI is a home for people building — or looking for — products in health, wellness, and fitness technology. Founders, engineers, designers, and operators all pass through the same hard problems: how to model workouts, keep users engaged, ship AI-powered coaching, and integrate the right APIs without reinventing the wheel.
We publish product breakdowns, API deep-dives, and practical playbooks so you can spend less time on undifferentiated plumbing and more time on the experience that makes your product worth using.
How the pages are checked
Factual claims come from vendor documentation fetched while researching that page, and a claim we could not verify is labelled as such rather than filled in. Before anything deploys, the build runs 193 automated refusals over the rendered site — broken anchors, truncated titles, undisclosed first-party links, and more — and every one is listed, with what it refuses to ship, at the gates. The rest of the process is in how we verify, and what got through anyway is in corrections.
KinesteX, an AI motion-tracking SDK, funds this site. It does not buy conclusions: pages that feature it carry a disclosure, and comparisons say where its competitors win.
Have something to share, or want to be featured? Reach out at nikita@kinestex.com.
Get the Fitness API Decision Kit — free
Sign up and the downloads appear instantly: the API selection checklist, the launch compliance checklist, the motion-SDK scorecard, and the full 2026 dataset. After that, one email when something actually changes — a deadline, a term, a deprecation. No fluff, no spam.
- ✓ API selection checklist
- ✓ Launch compliance checklist
- ✓ Motion-SDK scorecard (CSV)
- ✓ Fitness APIs 2026 dataset