EDIT: That one star review is simply wrong - clearly the guy dont get the concept, the QR code contains close to 300 waypoints, and photographing the phone screen with the camera is the trick to this, as that is how the software compensates for the time error in your cameras..
Original review below....
I have been geo-tagging images since forever, using all kinds of solutions... so naturally I had to download and try this, turned it on for a drive along the beach without expecting too much - but it worked exactly as advertised. This is the simplest easy to use geo-tagging solution I have ever seen, only thing simpler would be taking all your pictures with the iPhone.
So, for those wanting to know how this works here is the dime tour.
Install and start the app. click START NEW TRIP, this is all you need to know to get going. at this point you can start to photographing, leave the app running for as long as you want, I left it on 5 hours with no problems.
When finished photographing or when you get back to the hotel, click on the app and select EXPORT, this will create a raster-code image with ALL the information gathered during the time you kept the GPS recording, TAKE ONE PICTURE of the raster code. DONE.
Next launch the very small app on your laptop, it will ask for the folder with the pictures to be coded and ask you where you want them saved with the new code. (if you cant figure this out please dont buy the app, as its probably too advanced for your computer skills in that case)
That is really it, nothing more to it, next step import to Lightroom and click on the coordinates to see the image location on google maps, or whatever your image management software of choice might be. :-)
Back to the raster-pattern-code - this is the stroke of brilliance here. simply genius to say the least.
Anyone who have done geo-tagging know that we have to synchronize the camera time with the GPS time, this can be done by carefully setting the camera time or by selecting a offset time on the computer to match the time-track of the camera with the time-track of the GPS... OK..? this is where the raster-code comes in, the image also contains the current GPS time, pure genius, when the software find the picture with the raster-code, the software simply compare the camera time stamp with the actual GPS time code.
I used the software with a M9 rangefinder, and photographed the code with a 75mm, the software had no problems finding the code, if this work with a rangefinder it should work with about any digital camera in the world.
The one thing I dont quite understand is the how-long, dont know how many data points can be captured in the code, for touristing every 5 minutes ought to be perfect though, you can select higher precision by capturing more data points which will use more battery etc etc.
Nuf said... This is simple and works surprisingly well, Highly recommended.!
Bo