
Cronometer
Enable Cronometer through your Terra dashboard
Select a Wearable
Cronometer
Connect users to your app
0. "active_durations_data":{...}
1. "calories_data": {...}
2. "device_data": {...}
3. "distance_data": {...}
4. "heart_rate_data": {...}
5. "movement_data": {...}
6. "position_data": {...}
Start receiving data from Cronometer on your app or website



When data is available from a Cronometer device, Terra sends it straight to your webhook. During your Terra account setup you'll be prompted for a callback URL, and that is where Terra POSTs each payload.

Cronometer notifies Terra as soon as new data is available, and we POST the normalized payload straight to your webhook. No polling needed.
Terra API preserves the raw data from the wearable, it just standardizes the units and the json format. It doesn’t augment or change the raw data in any way.
Data is organized into one of 6 data types.
Learn More
Body Payload (JSON)
{
blood_pressure_data: { ... }
glucose_data: { ... }
heart_data: { ... }
metadata: { ... }
oxygen_data: { ... }
temperature_data: { ... }
}
Data can also be sent as a FIT File or with the FHIR Format.
Can't Find Your Question?
Terra API integrates with any Cronometer device currently supported by Cronometer.
Research and writing from the Terra team on Cronometer.
November 2025: Azure Blob Storage and Kafka join Terra's destinations, disconnection and re-auth events are standardised across every source, and strain scores cover running.
Alex Venetidis
These integrations also offer Body and Nutrition data.
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