Search for a fitness tracker app on Android and many results are built to keep you inside one company's hardware. The band's own app wants the band. Switch brands and your history, habits and progress can end up stuck in an app you no longer open. For a platform built on openness, Android fitness has long looked like a set of walled gardens running on the same operating system.
Health Connect is Google's answer to that problem. It is worth understanding as a platform story, not a feature checkbox, because it changes what a single Android app can promise its users.
What Health Connect actually is
Health Connect is a shared data layer for health and fitness information on Android phones. According to Google's developer documentation, it is part of the Android system from Android 14 onwards and appears in Settings, while on Android 13 and lower it is a separate app on the Play Store (first released there on 11 November 2022); it needs Android 9 or later.
Instead of every fitness app building a separate integration for every wearable brand, a device's companion app can write its data into Health Connect, and any other app you allow can read it through one consistent interface: steps, heart rate, sleep, workouts, weight and more. Samsung Health, for example, has synced with Health Connect since October 2022. Whether your particular band or watch writes to Health Connect depends on its companion app, so it is worth checking that app's settings.
A few properties matter for privacy:
- On-device storage. Google's developer codelab states that data in Health Connect is stored on the device and encrypted.
- Granular permissions. You choose, per app, which data types it can read or write, for example heart rate but not sleep.
- Revocable access. You can remove an app's access at any time from Health Connect settings. Note that removing permission doesn't delete data already stored, and an app may keep a copy it downloaded earlier; deleting that is managed in the app itself.
For developers, the appeal is straightforward: build one integration against Health Connect instead of many against individual device SDKs, and the app can work with whatever compatible hardware a user already owns. Our Health Connect fitness tracking guide walks through the user side in more detail.
Why many fitness apps still don't lean on it
Adoption has been uneven. Some apps default to their own tracking stack, or treat Health Connect as an export option buried in settings rather than a primary data source. That can be a rational business decision, especially for a company that also sells hardware and wants you to stay inside its ecosystem. But it leaves a gap for anyone who owns a device from one brand and prefers software from another, or who switches devices and doesn't want their history to reset.
Where NYUS fits in
NYUS is an India-first AI fitness and nutrition coach, and its wearable strategy was built on Health Connect from the start rather than added later. With your permission, NYUS reads steps, sleep and heart data from Health Connect, whichever compatible phone, band or watch produced it, with no dedicated device required and no brand-specific integration to maintain.
The practical effect is unglamorous but real. Someone with a budget band and someone with a premium watch get the same coaching experience, because the app reads the same standardised layer. That data then sits next to the workouts and meals you log, so a week of short sleep or fewer daily steps shows in the same weekly picture as the rest of your log.
This is a small design decision, not a headline feature. But it shows how Health Connect is often used in practice: as connective tissue that lets a newer, smaller app compete on software quality without also having to win a hardware-compatibility race against the largest device makers.
The broader platform question
The interesting question isn't about any one app. It is whether Health Connect ends up lowering the cost of building hardware-agnostic software to the point where "which wearable do you own" stops being a reason you can't use the app you'd otherwise choose. Adoption is still partial. Apps built on it from the start are one signal of where it is heading.
NYUS is not sponsored by or affiliated with Google or Samsung.