I only updated from the trial to the full version yestarday but I believe that it updates like all other apps. My trial version had last cycles charts/plates on it and showed the little sign on the app that means an update is available. I hit the "update" button and pow all charts and plates updated. My guess is that with each new cycle the app will have an update available. I also like that you can touch an airport on the chart (obviously you have to have a network or sevice available) and it brings up an option to add it to your route, download plates etc...

So say I am doing my normal trip from KCPK to 8G6, I put those two in and it draws a line on the chart. Then I can go along the route and click on other waypoints/airports and add them, get info, get plates etc... Also on the airport info page it has everything you need from traffic pattern alt to freqs if you are VFR or you can just touch on the plate and it downloads then you can arange them how you like. As you can tell I am excited about this program.