Update GPS Log
From Geospike DocWiki
Updating
You can update GPS Log via iTunes on your PC, or via the App Store on your iPhone or iPad
Old versions of GPS Log will not support all the share services, and may have bugs or missing features. So please update regularly (at least once a month is a good idea)!
Finding the Version Number
To find out the current version of GPS Log, go to GPS Log -> Settings, and scroll to the bottom.
The version number may have a letter after it. l means you are using the FREE version. b and g indicate beta versions.