Is the Fitbit Edge better than the Fitbit Air?

For workouts, yes. It adds a screen, built-in GPS, an altimeter and ECG. For sleep and recovery tracking alone, the cheaper Air does the same job.

Does the Fitbit Air have GPS?

Only connected GPS, which uses your phone. The Edge has built-in GPS.

They appear to use the same heart rate hardware, and both store heart rate at 2-second intervals.

No. Neither has NFC, so contactless payments are not available.

Fitbit Edge or Fitbit Air? Both last up to 7 days and work with iPhone. The…