I have found three APRS apps for iPhone/iPodTouch using APRS in some form. One is just re-directing to an APRS web site available for every one. Other services in that app need subscriptions, which are free on other web sites! Before you buy an app it is wise to read reviews or find info on the web if possible. An other APRS app is more focused on messaging than maps. The app PocketPacket is the best developed one for the moment as I see it. The screen dumps are from the PocketPacket. The left one is part of the set-up screen. I have here set my position manually. After connection to an APRS server the packet flow can be observed as shown in the right screen dump.
17 November 2009
See a short video here showing how I did receive a CQ from F5PEZ in France. This was on the 10 MHz band today. I just put an external microphone to the iPod Touch close to the loudspeaker of a Yaesu FT-857D transceiver´s loudspeaker. It was a little tricky to tune in the PSK31 signals and I did not try to send my own PSK31 signals.