I been testing the Android phone with Echolink, works great, can make Echolink calls to other Links and Repeaters just fine, so easy to install, configure and operate. All the preference settings are simple and just what you need, very un-complicated.
And the APRS tracker is great too, the choice of doing single position reports, or full tracking (send & receive). again, settings a very simple, easy to understand and use.
Comparing the hands on operation of my daughter's iPhone4 versus my Android, I gotta say I prefer the menu system of Android, much easier, my Android has a 'Back' (touch) button, it always gets you back up a level, whereas the iPhone4 do have a screen button, but not for all menu levels, so sometimes you have to press the physical home button, which takes you back to home.