no app, but it sends it to your email... which you should get on your phone... Set no answer/busy forward to your gv number, integration a plenty, and there's a play message link in you email so you can listen to it, if necessary.
Oh, and while it rarely gets the transcription exactly right, it usually comes close enough for me to figure out if I want to return the call or not.
Used Fusion Voicemail for a while. Can't really remember what I didn't like about it, but something made me decide to get rid of it, I think the app was a little buggy when I used it, but I'm pretty sure that was on my i910.
I don't know. Works perfect. I've been using it for the past six months or so.