Yes — it works by matching the photo’s capture time to the timestamps in the GPS log recorded by the app.

The camera stores the date/time each image was taken in its EXIF metadata. The app records a series of GPS points, each with its own timestamp. When you later transfer the GPS log to the camera, it assigns a location to each image based on the corresponding time in that log.

So the main factors affecting accuracy are:

• how accurately the camera clock and device clock match
• how often the app records location points

If logging is infrequent, the assigned position may be less precise because the nearest recorded point could be some distance from where you actually took the photo. More frequent logging improves accuracy but uses more battery.

A practical compromise is to use a manual “log now” or equivalent when you take the camera out for a shot, so there’s a GPS point very close to the photo time.