--- title: "Printable cheat sheets: HealthKit, Health Connect, pose keypoints" canonical: "https://aifitnessapi.com/cheat-sheets" markdown: "https://aifitnessapi.com/cheat-sheets.md" type: "record" last_reviewed: "2026-10-17" description: "One-page PDF and PNG cheat sheets: HealthKit identifiers and permission errors, Health Connect records and the 30-day window, COCO-17 and BlazePose-33." publisher: "AIFitnessAPI — funded by KinesteX; first-party pages disclose it" cite_as: "\"Printable cheat sheets: HealthKit, Health Connect, pose keypoints\", AIFitnessAPI, https://aifitnessapi.com/cheat-sheets" --- # Printable cheat sheets: HealthKit, Health Connect, pose keypoints > 3 one-page A4 cheat sheets, each as a PDF to print and a PNG to pin or post: HealthKit (common identifiers, units and permission errors), Health Connect (record types, read permissions and the 30-day history window) and pose keypoints (COCO 17 and BlazePose 33 index maps). A script prints them with a headless Chromium from the site's generated copies of Apple's, Google's and the model authors' sources, so each line is copied, not retyped; the newest source was read 2026-10-17. Free under CC BY 4.0. - Canonical: https://aifitnessapi.com/cheat-sheets - Last reviewed: 2026-10-17 - Publisher: AIFitnessAPI (https://aifitnessapi.com) - Cite as: "Printable cheat sheets: HealthKit, Health Connect, pose keypoints", AIFitnessAPI, https://aifitnessapi.com/cheat-sheets --- ## HealthKit cheat sheet [PDF (42 KB)](https://aifitnessapi.com/cheat-sheets/healthkit.pdf) · [PNG (500 KB)](https://aifitnessapi.com/cheat-sheets/healthkit.png) 25 common quantity and category identifiers with Apple's aggregation style (sum or average), unit family and first iOS version; the value enum each category type decodes with; HKUnit.percent() as a 0.0–1.0 fraction; SDNN versus RMSSD; the four HKError.Code authorization and availability cases in Apple's words; and every type Apple marks read-only. From src/data/healthkitIdentifiers.ts and healthkitWritability.ts, generated from Apple's documentation JSON; sources read 2026-10-02. [Every HealthKit identifier](https://aifitnessapi.com/healthkit-identifiers). ## Health Connect cheat sheet [PDF (42 KB)](https://aifitnessapi.com/cheat-sheets/health-connect.pdf) · [PNG (620 KB)](https://aifitnessapi.com/cheat-sheets/health-connect.png) Every current Health Connect record class by Google's category, with its shape and read permission; the 30-day history window and the background-read permission in the words of Google's HealthPermission reference; and which records sit behind a feature flag. From src/data/healthConnectRecords.ts, generated from Google's data-types page and the Jetpack references; sources read 2026-10-03. [Health Connect records and permissions](https://aifitnessapi.com/health-connect). ## Pose keypoints cheat sheet [PDF (41 KB)](https://aifitnessapi.com/cheat-sheets/pose-keypoints.pdf) · [PNG (318 KB)](https://aifitnessapi.com/cheat-sheets/pose-keypoints.png) The COCO 17 and BlazePose 33 keypoints by index, as MMPose's coco.py and MediaPipe's pose_landmarker.py spell them, each with its index in the other scheme, the 17-number array that maps COCO onto BlazePose, and the models documented as using each scheme. From src/data/poseKeypoints.ts, generated from the model source files; sources read 2026-10-17. [All nine schemes in the keypoint playground](https://aifitnessapi.com/tools/keypoint-playground). ## How the sheets are made - Drawn by scripts/build-cheat-sheets.mjs: scripts/lib/cheatSheets.mjs lays each sheet out as HTML from the generated modules, and Playwright's Chromium prints it to one A4 PDF page and a 2x PNG. A sheet that would overflow one page fails the build instead of printing a second. - The only hand-made choice is which HealthKit identifiers count as common; their facts are Apple's. A sheet is redrawn when its data changes, and qa fails when a published sheet no longer matches the data or a file passes 1.5 MB. Free to print, pin and share under CC BY 4.0: credit AIFitnessAPI and link https://aifitnessapi.com/cheat-sheets.