Apple HealthKit vs Google Health Connect (2026)

How these two compare#

These are platform SDKs, not cross-platform APIs, so the criteria are different from picking a wearable or aggregator service. Four things decide how each one behaves in your app:

• Platform lock. HealthKit data exists only on Apple devices, and Google describes Health Connect as "exclusive to Android and Google Play." Both are read on the device: Apple gives iPhone, Apple Watch, Vision Pro and iPadOS 17+ iPads their own HealthKit store and syncs between them, while Google's Fit migration guide calls Health Connect's storage device-centric and points server-to-server integrations at the separate Google Health API. This is why they are complementary, not competing.
• Permission model. Both use on-device, per-data-type user permission, granted (or denied) per type and per direction — read and write are separate. Health Connect needs every permission declared in the manifest before you request it; HealthKit lets you ask for a type when you first need it rather than all at once. Neither uses an OAuth consent screen. That changes your onboarding UX: the user is toggling individual data types, not approving a single scope.
• History and approval friction. Health Connect returns data from up to 30 days before the first permission grant unless you hold the history permission, and the Play Console requires a Health apps declaration before you publish. HealthKit now lets a person grant only a recent window of history instead of everything — Apple's authorization flow asks on a second screen — and Apple calls the HealthKit purpose strings "an App Store requirement for any app that integrates with HealthKit."
• The "denied reads as empty" gotcha. A HealthKit app cannot tell whether the user denied read permission for a type — Apple says it "simply appears as if there is no data of the requested type in the HealthKit store," apart from samples your own app saved. Full access and denied access also look identical; only a limited history window is detectable, through earliestAuthorizedSampleDate(for:) on iOS 27 and later. That directly complicates data-completeness logic.

HealthKit vs Health Connect at a glance#

Apple HealthKit#

HealthKit is best for iOS-native apps that want the health data iPhone and Apple Watch already collect, with the tightest OS-level privacy integration. Apple describes it as "a central repository for health and fitness data on iPhone and Apple Watch" that your app reads from and writes to with the user's permission. Its type catalogue covers steps, distance, active and basal energy, heart rate, HRV (SDNN, plus RMSSD from iOS 27), respiratory rate, blood oxygen, VO2 max, sleep stages (core, deep and REM), workouts, body measurements and characteristics such as date of birth — plus clinical records in FHIR format behind a separate Clinical Health Records capability. Access is on-device and per-data-type: you add the HealthKit capability, set the NSHealthShareUsageDescription and NSHealthUpdateUsageDescription purpose strings, and call requestAuthorization(toShare:read:) — Apple notes it can make more sense to wait until you need a type before asking for it. The trade-off to know is a deliberate privacy design decision: an app cannot tell whether read permission was denied, because denied data reads as empty rather than raising an error, and a person can also limit you to a recent window of their history. Plan your data-completeness and empty-state handling around both. The HealthKit capability itself is available even to free Apple Developer accounts, per Apple's capability table; shipping on the App Store needs the paid Apple Developer Program.

Google Health Connect#

Health Connect is best for Android-native apps that want one on-device store fed by the other health apps on the phone, rather than a per-provider integration for each — Google pitches it as access to "a growing ecosystem of apps with just one connection." It needs Android 9 or later with Google Play services; it is part of the Android framework from Android 14 and a Google Play app on Android 13 and lower. Google's data-types table lists 42 record types (as of its September 23, 2026 revision) across activity, body measurement, cycle tracking, nutrition, sleep with stages, vitals such as heart rate and HRV (stored as RMSSD) and wellness, plus a separate medical-records feature in FHIR format, all through the androidx.health.connect:connect-client Jetpack library, whose 1.1.0 release Google announces as stable. Permissions are declared in the manifest and granted by the user per type, with dedicated background-read and history-read permissions — again, no OAuth consent screen. Two constraints shape your build: by default an app sees data from up to 30 days before its first permission grant unless it holds PERMISSION_READ_HEALTH_DATA_HISTORY, and the Play Console requires a Health apps declaration listing every data type you use before you publish. Do not start new work on Google Fit. Google's Fit migration guide, updated September 10, 2026, cautions that "The Google Fit API (including the REST API) will only be supported until the end of 2026." Google recommends Health Connect for step tracking and mobile-first apps and the Google Health API for cloud-based integrations, and the guide maps Fit History and Session API integrations to the Google Health API, not to Health Connect.

Which should you pick?#

Frame this by platform, not by picking a winner — for most builders the honest answer is "both":

• If your app is iOS-only → implement HealthKit, and design your empty-state and data-completeness logic around the fact that you cannot detect a denied read.
• If your app is Android-only → implement Health Connect, request the history permission if you need data from more than 30 days before the first grant, and budget time for the Play Console Health apps declaration.
• If your app is cross-platform → you implement both, one per OS. Apple's HealthKit runs only on Apple platforms and Google calls Health Connect exclusive to Android, so each is the native surface for its own OS. In React Native, the comparison of react-native-health and @kingstinct/react-native-healthkit covers the two bridges to the HealthKit half.
• If you don't want to build and maintain two native integrations → compare the third-party aggregator APIs instead. What each one covers and costs is a vendor claim, sourced and dated on that page; this page checks only Apple's and Google's documentation.

The key takeaway: HealthKit vs Health Connect is not a competition you have to resolve. They cover different operating systems, so a real cross-platform product uses each on its own OS, or offloads both to an aggregator. See our wearable data APIs guide if your real need is pulling from specific devices rather than the OS store. To look up the Health Connect record for a given HealthKit identifier, or the reverse, use the identifier translator.

Watch the fine print#

Platform details in this category move — SDK versions, permission names, history defaults and review policies all change; HealthKit's limited-history authorization is a recent example. Every fact above was checked on October 2, 2026 against the Apple and Google pages listed in this page's sources. Confirm current behavior in Apple's HealthKit documentation and Android's Health Connect documentation before you build, especially the permission and review requirements that gate your launch.