We just released a new version of Gaia GPS for iOS (10.1). You can see the release notes here (and in the app).
Perhaps the most important change is that Gaia GPS will now sync data when it connects to a wifi network. Before, syncing would only occur when you saved things online, so a lot of people got in a state where they had to manually force a sync when they made tracks and photos offline. This change should mean your device will stay in sync with gaiagps.com without manual action.
If you are curious, you can also see a lot of past release notes for our apps here.