The usage of the app is pretty simple but first and really important, you have to sync the time in your camera to the time in your iPhone so the photos will be properly tagged. Once you’ve done that you can start using the app.
When you go out on a shoot you start the app and turn on the geologging. You can see at the top there are several modes for this. The default is Continuous, which is the more accurate one but drains the battery the most as well. I find this one good if you are moving a lot and fast, as in a car or some other vehicle. If you are just walking or even on the same spot for a while you can set the geologging just at once every 3, 5, 10 or 60 minutes. The app has a cool feature as it tells you approximately how long the battery will last with that mode on. For my bike shoots I always use the 5 minute mode.
Once you decide which mode you want to use, just lock the screen and start shooting.
One thing to know is that if you receive a call or switch app to check email or any other thing the mode switches automatically to Continuous. It’s good it still keeps geologging but keep it in mind for battery endurance.
After the shooting session and back home it’s time to geotag the photos. The process is really simple and needs a little setup but only the first time. You need to have a shared folder in your Mac, yo can do this easily in Sharing, at System Preferences. I have set up a shared folder on mine called GeoTag. This is the folder I use to download the photos once I get home. After downloading them you turn on the GeoLogTag app in the iPhone, log onto the same WiFi network the computer is in and search for the shared folder.
Then the app searches through the photos to match the times from the photos to the geologging times (that’s why it’s so important to have the times in sync). After it’s done it tells you how many photos it found. Click on the red icon and it writes .xmp sidecar files to the folder with the geodata in them.
After that I move all the photos to the folder where I will store them and import them into Lightroom. If you then convert your Raws to DNG then the .xmp file will be deleted as all the data is embedded into the file. Now you can see at the bottom of the EXIF tab the geolocation data on each photo. If you click on the arrow at the right a new web browser opens with the location on Google Maps.
For more info and support on the app you can visit the developer’s website. There you can also find instructions on how to create the shared folder and the process to geotag photos on Flickr and SmugMug.
That's all there is to geotagging photos. It's easy, it's simple and you don't need a separate device as you already carry your iPhone with you all the time. If you are using this app or any other please leave a comment to share your opinion.