DTRACBefore reading the matrix
The matrix below summarizes device recording scope from pages 4 and 13 of the September 17 presentation. It is not a new device-by-device validation performed for this website. O means recorded as available in the presentation, X means unavailable as a standalone device measurement, △ means conditional, and ? means needs verification.
A recording-capable device still needs phone synchronization, provider storage/sharing, SDK permission, and DTRAC implementation. Recheck the model, region, and software version before purchase or study assignment.
Recording scope in the presentation
| Data | Phone alone | Watch 7/8 | Ring | Fit3 | DTRAC Samsung path |
|---|---|---|---|---|---|
| Steps | O | O | O | O | Read branch exists |
| Heart rate | X | O | O | O | Automatic pull enabled |
| Sleep time/stages | X | O | O | O | Automatic pull enabled |
| Oxygen saturation during sleep | X | O | O | O | Read branch exists |
| Exercise records/duration | O | O | O | O | Automatic pull enabled |
| Automatic exercise detection | X | O | △ | O | Through exercise records |
| Distance | O | O | ? | O | Depends on provider exercise record |
| Exercise speed | O | O | ? | ? | Field ingestion needs verification |
| VO₂max | X | △ | ? | ? | Current collection needs verification |
The presentation describes Ring automatic detection as walking/running. Watch VO₂max is conditional on exercise type and measurement conditions. For blood pressure, glucose, and body temperature, distinguish direct measurement, manual entry, and external devices from automatic wearable measurements.
Roles of the SDKs
| Path | Execution/data location | Current DTRAC |
|---|---|---|
| Samsung Health Data SDK | Samsung Health records on the phone | In use |
| Health Connect | Records shared by apps on the phone | Implemented, disabled by default |
| Samsung Health Sensor SDK | Sensors on supported Galaxy Watches | No confirmed current integration |
Samsung's overview describes Sensor SDK as a separate watch measurement SDK. It is not the same path as reading stored data with Data SDK.
Before study deployment
Record device model, phone OS, Samsung Health version, SDK version, permissions, and source-record availability together. For sleep, exercise, and heart rate, inspect a sample through provider → local database → research server before marking a combination as validated. Retain ? and Needs verification labels until those checks are complete.