Google Fit API

Google Fit API

The Google Fit API helped fitness and wellness apps connect with activity and health data such as steps, sessions, calories, and other wellness metrics. For product teams building connected fitness experiences, it became a common way to bring movement data into mobile applications, dashboards, and user progress flows. Today, it is still an important technology to understand for legacy integrations, migration planning, and modernization work. However, teams building new Android health experiences should now plan around Google’s migration path, especially toward Health Connect. 

What Is Google Fit API?

The Google Fit API is a health and fitness integration framework from Google that was designed to let applications read, write, and manage fitness-related data. It supported use cases such as activity tracking, step counting, workout sessions, calorie monitoring, and wellness insights across Android and connected services. Google provided both Android APIs and a REST API for different implementation models. 

Why Product Teams Used Google Fit API

For fitness app builders, the Google Fit API made it easier to create a more useful and personalized user experience. Instead of asking users to enter everything manually, apps could use connected activity data to power progress reports, goals, coaching logic, and performance dashboards. This helped improve onboarding, habit-building, and long-term engagement. Its value was especially strong for:

• fitness tracking apps

• wellness apps

• coaching platforms

• sports training products

• habit and lifestyle apps

• connected health dashboards 

Google Fit API Use Cases

A typical Google Fit API integration could support several product experiences:

• Reading daily step count for user dashboards

• Syncing workout sessions into a fitness journal

• Pulling calorie or activity data for goal tracking

• Building progress summaries inside a wellness or coaching app

• Connecting historical fitness data with personalized recommendations

• Enabling health-aware gamification in sports and fitness products

Google Fit API Features at a Glance

Google Fit API Status in 2026

Any page about Google Fit API should now clearly explain its current status. According to Google, the Google Fit APIs are deprecated in 2026. Google also states that developers have not been able to newly sign up for these APIs since May 1, 2024. For Android health and fitness apps, Google is directing developers toward Android Health APIs, especially Health Connect. Google’s migration FAQ also says there is no alternative to the Fit REST API, which is important for teams that previously relied on REST-based architectures.

What Should Teams Build Now?

For legacy apps, understanding the Google Fit API still matters because many products need to maintain existing integrations, handle user data transitions, or redesign their architecture around newer Android health tooling. Google’s documentation recommends that existing Fit developers migrate toward Android Health APIs, including Health Connect, which provides an on-device repository with centralized user-controlled sharing between apps. 

In practical terms:

• Existing apps may need migration planning

• New Android health apps should evaluate Health Connect first

• Teams using Fit REST must review architecture carefully because Google says there is no direct replacement for the Fit REST API

Google Fit API vs Health Connect

This comparison is based on Google Fit deprecation notices and Android’s Health Connect documentation. 

Technical Example: Google Fit API REST Request

Below is a simple legacy-style example showing how a server could request aggregated step data from the Google Fit API REST layer. This is useful as a reference for older systems and migration reviews.

curl -X POST "https://www.googleapis.com/fitness/v1/users/me/dataset:aggregate" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "aggregateBy": [{
      "dataTypeName": "com.google.step_count.delta"
    }],
    "bucketByTime": { "durationMillis": 86400000 },
    "startTimeMillis": 1711843200000,
    "endTimeMillis": 1711929600000
  }'

Google’s REST documentation confirms the availability of REST-based access patterns, OAuth usage, and aggregate dataset workflows for Google Fit. 

Technical Example: Migration Direction for Android Apps

For Android teams modernizing a fitness app, the more future-ready path is to evaluate Health Connect rather than build a new dependency on the Google Fit API. Google explicitly recommends migration for existing Fit developers and positions Health Connect as a common health platform for Android developers.

// Example direction only: modern Android health integrations
// should evaluate Health Connect for future-facing builds.

val permissions = setOf(
    HealthPermission.getReadPermission(StepsRecord::class),
    HealthPermission.getWritePermission(StepsRecord::class)
)

When Google Fit API Still Matters

Even with deprecation, the Google Fit API is still relevant when a company needs to:

• audit an older mobile health application

• support an existing Android fitness product

• migrate user data workflows

• re-architect server logic built around the Fit REST API

• understand technical debt before modernization

For many product teams, the question is no longer “Should we start with Google Fit API?” but “How do we responsibly move beyond it without breaking the user experience?”

FAQs 

What is Google Fit API?

The Google Fit API is Google’s framework for accessing health and fitness data such as steps, sessions, and activity-related records across supported applications and services. Google provided Android APIs and a REST API for developers.

Is Google Fit API still available?

Google says the Google Fit APIs are deprecated in 2026. Existing developers may still be managing legacy implementations during the migration period, but new developers have not been able to sign up since May 1, 2024.

Can new developers start using Google Fit API?

No. Google states that developers cannot sign up to use these APIs as of May 1, 2024.

What is the alternative to Google Fit API?

For Android health and fitness apps, Google is directing developers toward Android Health APIs, especially Health Connect. Google also mentions Fitbit Web API for certain account-centric Fitbit ecosystem use cases.

Is there a replacement for Google Fit REST API?

Google’s migration FAQ says there is no alternative to the Fit REST API. This means teams with REST-dependent architectures may need a broader redesign rather than a simple one-to-one replacement.

Why is Google Fit API still important for businesses?

The Google Fit API is still important for businesses that maintain older fitness apps, need migration planning, or want to understand how legacy health integrations were built before moving to newer Android health technologies. This is especially relevant for audit, modernization, and product continuity work.

Should a new fitness app in the USA build with Google Fit API today?

For most new Android health and fitness products, the better path is to evaluate Health Connect rather than start a fresh dependency on the Google Fit API, because Google has already deprecated Fit and published migration guidance.