Specter

Device Linking

Specter on Wear OS requires a one-time link to your Android phone. After that, the watch operates independently.

1. Open Specter on your Wear OS watch
2. Tap Link Device
3. A 6-digit code appears on the watch
4. The code is sent to your phone via the Wearable Data Layer
5. Confirm the code on your Android phone
6. Auth tokens are sent back and stored in EncryptedSharedPreferences

Recording a Workout

1. From the home screen, tap an activity type:

   Run	RUNNING — pace tracked
   Ride	BIKING — speed tracked
   Swim	SWIMMING — open water
   Hike	HIKING — elevation tracked
   Walk	WALKING — pace tracked
   Other	WORKOUT — general

2. Health Services begins recording sensor data and GPS activates

Live Stats During Workout

During your workout, the watch displays a 3x2 grid:

Position	Stat	Details
Top left	PACE	min:sec per km
Top right	HR	Heart rate in bpm (red)
Middle left	DIST	Distance in km
Middle right	TIME	Elapsed time
Bottom left	CAL	Active calories
Bottom right	Controls	Pause and stop

Controls

1. Pause (yellow) — pauses workout and data collection
2. Stop (red) — ends workout, saves locally, triggers sync

Post-Workout Summary

After stopping a workout:

1. Activity type and distance displayed
2. Duration and heart rate shown
3. Sync status: "Synced" (green) or "Will sync when connected" (yellow)
4. Tap Done to return to the picker

Offline Sync

Specter saves every workout to local storage immediately. Uploads happen in the background via Android WorkManager.

1. You finish a workout with no signal — activity saved to disk
2. Watch connects to a network (cellular, WiFi, or Bluetooth relay)
3. WorkManager detects connectivity and uploads pending activities automatically
4. Both stats and GPS route (as GPX) are sent to the backend

Manual Sync

1. If "Pending: X" appears on the home screen, tap it to force a sync
2. Requires an active network connection