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Welcome to AIFitnessAPI
Why we're building a hub for the people shipping the next generation of health, wellness, and fitness products — and what you can expect to find here.
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Health · Wellness · Fitness Tech
The hub for builders in health, wellness & fitness tech.
Ideas, playbooks, and product breakdowns for people building — or looking for — products in health, wellness, and fitness tech.
Free tools
What we cover
Full site index →Fitness & workout APIsCompare and choose an API by the job — exercise content, wearables, aggregators, nutrition, or AI motion tracking.Add AI workout trackingThe capture → pose → interpret pipeline: camera pose, rep counting, form feedback, and per-platform wiring.Build a workout appEnd-to-end build playbooks by app type — home workout, coaching, strength, running, rehab, and more.Integration guidesRegister, OAuth, fetch, and webhooks — a hands-on guide per provider, from HealthKit to Terra.TroubleshootingSymptom-to-fix for the common errors: 401s, rate limits, empty data, dead webhooks, and OAuth snags.Concepts explainedPlain-English explainers for the health-tech vocabulary — OAuth, aggregators, HRV, VO2 max, and more.AlternativesAnchored on one product: why teams look to switch, and the realistic options — with links to the comparisons.Compliance & privacyWhich rules apply — HIPAA, GDPR, FDA, app-store policy — and how to build for consent, storage, and deletion.Migration guidesStep-by-step playbooks for moving an integration — Google Fit to Health Connect, direct-to-aggregator, and more.PricingWhat fitness and health APIs really cost — which are free to call, which charge, and what drives your bill.ComparisonsHead-to-heads through the developer lens — Oura vs WHOOP, Fitbit vs Apple Watch, Terra vs Rook, and more.Health data by metricWhich API gives you each metric — heart rate, steps, sleep, calories, HRV, VO2 max — and measured vs estimated.AI motion & pose estimationThe tech behind camera fitness — pose models, 2D vs 3D, on-device vs cloud, rep counting, and form scoring.AI & LLM featuresPlan generation, natural-language food logging, coaching prompts — plus guardrails, model choice, and cost.Health data architectureThe layer after the integration works — dedupe, normalization, timezones, sync, storage, and data quality.
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How to Choose a Fitness API in 2026
A practical framework for evaluating fitness and workout APIs: exercise data, motion tracking, AI coaching, pricing, and the questions that matter.
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Build the future of fitness & wellness
Product breakdowns, API deep-dives, and playbooks for founders and engineers in health tech. No fluff, no spam.