Well, the full discussion on solutions is available on
http://www.gps-laptimer.de/compatibility/ios. Depending on your country, it may be difficult to find a distributor. The Glo2 is working with LapTimer, but it is not integrated directly. This means you will pair the device with your iPhone and iOS will feed the data to all apps - replacing the GPS stream from the internal GPS. LapTimer will consider this the iPhone's GPS and display it like this. However, it will show an update rate bigger the the usual 1Hz.
The last time I worked with the Glo, the Mfi integration into iOS did not deliver the 10 Hz claimed. Instead, I got 4 or 5 Hz only. Another reason the Glo is not on the first class recommendation list. But it may have changed since then...
- Harry