Time Terminal 2.x requires your device is running iOS 7 or higher. if you need to upgrade iOS on your device, please follow the instructions provided by Apple here: https://support.apple.com/en-us/HT204204

Closing Time Terminal

The first step in updating Time Terminal on your iOS device is to close the Time Terminal App if it is currently running.

Updating Time Terminal App

The next step in updating Time Terminal on your device is to go into the iOS App Store and update the Time Terminal App.  

1. Locate the icon for the App Store and tap it to open the App Store
2. Tap on Updates in the bottom right corner of the App Store screen
   
3. Locate Time Terminal in the "Pending Updates" section
   1. If Time Terminal does not show a pending update, the app was either automatically updated or you are running iOS 6 or lower.
4. Tap the Update button on the right side of of the screen
   1. The update button will transform into a circular icon that will display the progress of the update.
5. Once the update is complete the progress icon will change to an Open Button.
6. Press the Home button to return to the Home screen
7. Tap on the Time Terminal app to launch Time Terminal

Verifying the Time Terminal Version