1) Click your iPhone's home button twice to return to the iPhone home screen.

2) Click App Store to load the App Store.

3) Click Updates at the bottom of the screen.

4) If our app is listed, click on it and click Upgrade/Update. If it does not, you have the latest version!

How do I know what version I'm running? Click Settings > Gateway, and then look for "Version" at the bottom.

Note: in some cases, the minimum requirements for a particular version will increase - if you do not have the latest iPhone OS, you will need to upgrade first before proceeding.