How much does a fitness coaching API cost?
Short answer, September 2026: template generation without intelligence starts around $16 to $25 a month, infrastructure lanes run $191 to $499 a month, camera SDKs price per active user, the one full coaching engine besides ours is sales-gated with no public price, and building it yourself costs almost nothing in tokens and a lot in everything else. Line items and sources below.
Public list prices, by category.
| Category | Example vendor | Public price | What the money buys |
|---|---|---|---|
| Deterministic generator + exercise DB | WorkoutX | $0 to $24.99/mo, keys in minutes. | Self-serve workout and program generator plus a 1,400-exercise media library. Explicitly non-LLM by design. |
| Content + generation infra | Hyperhuman | From $191/mo. | Fitness content infrastructure with an OpenAPI surface: exercise content, workout generation, an insights digest. |
| Wearable data pipe | Terra | From $399/mo on the annual plan ($499 monthly), 100,000 credits included, roughly 200 credits per active user per month, overage from $0.005 per credit. | Normalized health and fitness data from 500+ wearables and apps, delivered by API and webhooks, plus derived scores. |
| Camera motion SDK | Sency | Per unique active user per month, pay as you go past 100 users; the published curve slides to roughly $0.10 per user at volume (August 2026 reading). | Real-time on-device motion tracking for fitness and health: rep counting, form scoring during the movement, movement assessments. |
| Coaching engine, sales-gated | Zing Coach (B2B) | Sales-gated; no public pricing, no self-serve keys. | The engine behind a consumer coaching app, offered as SDK, headless API and white-label: generation, adaptive progression, coach chat, camera assessments. |
| Coaching layer, self-serve | CoachLayer | Free sandbox (300 credits, no card); paid tiers from $39/mo, all public on the pricing table | Eight LLM coaching endpoints behind one key, metered in credits, benchmarked on production traffic |
Vendor prices are their public lists, checked August to September 2026. If one is stale, trust their page over ours; the point of this table is the shape of the market, and the shape is stable: the intelligence layer is either missing, gated behind sales, or here.
What one coaching moment costs on CoachLayer.
Computed live from the same pricing config the billing engine reads, so this table cannot drift from the bill.
| Call | Credits | On Build ($39/mo) | On Growth ($299/mo) |
|---|---|---|---|
| Readiness Brief (SITREP) the readiness brief your users open the app for | 3 | $0.047 | $0.037 |
| Coach Chat one coach chat message | 2 | $0.031 | $0.025 |
| Analyze Workout full post-session analysis | 6 | $0.094 | $0.075 |
| Weekly Report the Sunday report | 12 | $0.19 | $0.15 |
Worked examples for whole products (a coaching app user costs about $1.60 a month, a coach-platform seat about $2.10) are in the interactive calculator, which shares this config.
And if you just call the model yourself?
Honest math, from our own measured runs, at public list rates of $2 in / $12 out per million tokens:
We publish this table knowing what it shows: per raw call, doing it yourself is cheaper, and anyone who hides that is selling you something. The honest comparison is per shipped outcome. A brief that clears a production quality bar, holds its safety rules under model migrations, and comes with a benchmark you can audit is a different unit than a completion, and the gap between those two units is exactly what the benchmark page measures.
The questions buyers actually ask.
Why credits instead of per-token pricing?
Because your finance team cannot forecast tokens and neither can we. A readiness brief is 3 credits whether the model needed a short or a long context that day; volatility in token consumption is our problem, not your invoice’s.
What happens when I run out of credits?
Paid tiers meter overage at a published per-credit rate that decreases with tier size; the sandbox stops hard instead of billing. Exact overage rates are on the pricing table.
Is there really a free way to evaluate this?
Yes: the sandbox tier includes 300 credits with no card, enough to test every endpoint against your real data shapes before a single pricing conversation.
Run your own numbers.
The calculator reads the same config the billing engine does. No sales call between you and the estimate.
Open the cost calculator