I am thinking of getting the Appradio 2 and have an iPhone 5. I know it is now compatible, but can I use my apps on my iPhone on the Appradio? I have TomTom ect.. that I want to use.

Pioneer has a list of compatible apps that run with its Appradio software and various units.

http://www.pioneerelectronics.ca/POCEN/Car/AppRadio

To go beyond that requires a jail broken IPhone/Pod or Android (the latter only with Appradio head Units I believe)- Check out the forums here re: Appradio Extensions / Cydia.

You can use the apps Pioneer listed on their website as being iPhone 5 compatible. Now, if you get a parking brake bypass you can view any app you want on the display. Unsupported apps will not support touch control, but they will let you look at them full screen. In the case of your tom tom app. The sound and video feed would go through the display, but you would not be able to control it on the appradio. you would have to control it on your iPhone.