Alibi
GPS is just one witness. Add more to check it.
Walk
Drive
Boat
GPS
I’m about here
Landmark
Angle A↔B
Sky
Cell towers
Spoof GPS
Save offline
Witnesses
Real GPS log
Exit
Outage
Play
Outage
Exit demo
Back
Next
Simulated view
Direction (true)
—
Up from horizon
—
Cancel
Take
−1
−0.1
+0.1
+1
How sure? ± degrees
Use this to calibrate my phone compass (GPS is trustworthy right now)
Retake
Add witness
Close
Settings
Safety limit for this mode (m)
Extra compass correction (°)
Count my steps and carry the witnesses along as I walk (phone only)
Done