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Fitness API numbers you can cite

Computed when this page was built, Nov 9, 2026. Newest input written or checked Nov 9, 2026.

AIFitnessAPI tracks 24 fitness and health APIs, SDKs and models, has logged 22 dated ecosystem changes and recorded 15 shut-down, dying or deprecated APIs, and publishes 19 open CC BY 4.0 datasets. Every number on this page is counted from a file in the site’s repository at build time and printed with that file and the date its contents were last checked, so a figure here is only as old as its source line says.

What this site tracks

  • 24

    fitness and health APIs, SDKs and models in the directory

    In 7 categories (Wearable APIs (direct), Platform health stores, Health-data aggregators, Nutrition & food data, Exercise content, AI motion / coaching SDKs, Pose-estimation models). 1 publishes no price (contact sales); 13 have an approval or review step the site could source.

    Source: src/data/costModel.ts, source pages verified Jul 23, 2026 to Nov 9, 2026

    The API directory →

  • 22

    dated ecosystem changes logged: deprecations, deadlines and term changes

    19 confirmed in the vendor's own words, 3 reported. 2 vendors have a timeline of their own (Fitbit, 4; Strava, 2).

    Source: src/data/changes.ts, newest entry checked Nov 5, 2026

    The changes tracker →

  • 15

    shut-down, dying or deprecated fitness and health APIs, SDKs and endpoints recorded

    6 dead, 5 dying with a published end date, 4 deprecated, each with a verbatim quote from the vendor's notice.

    Source: src/data/graveyard.ts, sources read up to Oct 31, 2026

    The Fitness API Graveyard →

  • 19

    open datasets, CC BY 4.0, in JSON and CSV

    3,276 rows in all; the largest is fitness-api-docs-drift-2026 (982 rows).

    Source: public/datasets/*.json, files last regenerated Nov 6, 2026

    The open datasets →

  • 14

    collections in the free read-only JSON API

    1,678 item responses in all, each with its source page, license and verification date; no key.

    Source: src/lib/publicApi.ts, newest collection verified Oct 31, 2026

    The developer API and MCP server →

  • 331 of 469

    guide pages re-checked against their sources in the last 90 days

    Median age of a verification stamp: 38 days; 138 pages are due (90 days or older).

    Source: src/data/*.entries.ts (updated stamps), as of build Nov 9, 2026

    How pages are verified →

Across the directory

From the fitness API index, which publishes the raw signals per product and no composite score.

  • 5 of 6

    directory products with a tracked SDK or package that released in the last 365 days

    Counted over the products the index tracks a vendor SDK or open-source package for, Nov 9, 2026 back 365 days. KinesteX, which funds this site, is left out, as the index leaves it unranked.

    Source: src/data/libraries.ts, sdkReleases.ts, hcReleases.ts, registries and releases read up to Oct 4, 2026

    The fitness API index →

  • 8 of 23

    directory products named by a tracked change dated in the last 365 days

    Matched as the directory matches them; KinesteX left out.

    Source: src/data/changes.ts, newest entry checked Nov 5, 2026

    The fitness API index →

The year so far

Every stat of the 2026 story, with its caveat where it has one.

  • 16

    dated changes to fitness and health APIs in 2026

    14 confirmed in the vendor's own words, 2 reported. 1 is dated after Nov 9, 2026, the day this page was built.

    Source: src/data/changes.ts, newest entry checked Nov 5, 2026

    Every entry on the changes tracker →

  • September & October

    tie as the busiest months on the tracker, 4 changes each

    Counted by the month each entry is dated in. 4 entries are dated only "2026" by their sources and stay out of every month.

    Source: src/data/changes.ts, newest entry checked Nov 5, 2026

    The changes tracker →

  • 6

    pricing or plan changes logged in 2026

    5 confirmed in the vendor's own words, 1 reported. Each one, with the word that put it on this list: Caveat: an entry counts when its title names a plan, tier, price, subscription, membership or free offer.

    Source: src/data/changes.ts, newest entry checked Nov 5, 2026

    Read each entry on the tracker →

  • Mar 24, 2026

    the Google Health API launch, the Fitbit Web API's successor

    Google's release-notes entry for March 24, 2026 opens "Google Health API Launch Announcement". 9 release-note entries are dated 2026, and Google's data-types table lists 44 data types.

    Source: src/data/googleHealthApi.ts, Google's release notes read Oct 31, 2026 · original

    The Google Health API reference →

  • Nov 2, 2026

    the Fitbit Web API turn-off date Google gives

    223 days after the Google Health API launch. Support ended Sep 30, 2026. Google: "Requests to these endpoints will fail and return an HTTP 410 Gone status code."

    Source: src/data/googleHealthApi.ts, Google's About page read Oct 31, 2026 · original

    The Fitbit API shutdown center →

  • 4

    releases of Health Connect's connect-client in 2026

    None stable: every one is an alpha, from 1.2.0-alpha03 to 1.2.0-alpha06. Google's full release list, so this count is complete.

    Source: src/data/hcReleases.ts, read Oct 4, 2026 · original

    Every Health Connect SDK release →

  • 11 of 20

    tracked open-source health packages published a release in 2026

    The other 9 last released in 2019–2025. React Native, Capacitor and Cordova, Flutter and Python packages, read from npm, pub.dev and PyPI.

    Source: src/data/libraries.ts, registries read Oct 3, 2026

    The open-source library tracker →

  • August

    holds 9 of the 19 dated 2026 releases on record

    Releases of Health Connect's client, the GitHub releases of the tracked SDK repos, and each tracked package's latest registry publish, counted once per version. Caveat: skews recent: for most packages only the latest release is on record.

    Source: hcReleases.ts, sdkReleases.ts, libraries.ts, read Sep 28, 2026 to Oct 4, 2026

    The health SDK release tracker →

  • ≥ 5

    2026 releases of react-native-health-connect, the most this site can count

    The releases on file are dated Aug 1, 2026 to Aug 6, 2026. androidx.health.connect:connect-client: 4. Caveat: counted only for packages whose release list is on file; the file keeps five releases per repo, so this is a floor.

    Source: src/data/sdkReleases.ts, read Sep 28, 2026

    react-native-health-connect on this site →

  • 38 days

    median age of this site's verification stamps

    Across 469 cluster pages on Nov 9, 2026: 331 were re-checked against their sources in the previous 90 days, 138 are due (90 days or older), and every one carries a 2026 stamp.

    Source: src/data/*.entries.ts (updated stamps), as of build Nov 9, 2026

    How pages are verified →

From the research

Headline figures of the site’s original studies, each recomputed from its open dataset; the study page carries the method and its limits.

How to cite

Quote the number with its source line, and link the page it points to: that page carries the sourced detail and its own review date. Each stat above has an anchor (for example https://aifitnessapi.com/press#changes-logged). For this page:

AIFitnessAPI. "Fitness API numbers you can cite." Data as of 2026-11-09. https://aifitnessapi.com/press
@misc{aifitnessapi-press,
  author = {{AIFitnessAPI}},
  title = {Fitness API numbers you can cite},
  year = {2026},
  url = {https://aifitnessapi.com/press},
  urldate = {2026-11-09},
  note = {Data as of 2026-11-09}
}

Citing a dataset rather than a count? Each one has its own citation string and BibTeX entry on the datasets page, and the repository carries a CITATION.cff generated with the files. Spotted a wrong number? The corrections log is where fixes are recorded.