Coincidentally with the session on mobile voip with Ruben Olsen, I finally pulled the trigger on an iPod Touch “second generation”. This is IMO the iPhone without phone, camera or GPS. What that leaves is a very good mobile computing platform with WiFi, an mp3 and video player and the worlds hippest most intelligent interface to date.

NOTE: I will add new clients I test to this thread as comments

NEW note: Ruben just published this article on the subject.

Cutting to the chase, I have tried several SIP clients in the last 48 hours, and here are a few of my experiences.

The best performer has been iPico, $9.99 but far ahead of the others in most things. It will do only a single SIP account though. Call quality was best and it dials SIP URI, something none of the others do AFAIK. This is important because to dial in to Talkshoe, ZipDX and many other things that interest me, I need SIP URI. Edit: iSip has fixed the audio issue I was having and demonstrated excellent support in the process.

Next comes iSip, $6.99, (built on pjsip). Multiple SIP accounts, decent interface but a problem with outgoing audio quality.

The I tried WeePhone, $4.99. It has the least well done interface, but looked as if it would work fine, but the outgoing audio was absolutely unuseable, horribly distorted.

Skype (not really a SIP client, but…) works well but can not make free calls to SIP services so I’m just adding that I did test it and it does work. And it’s free.

Looking at the reviews on the app store isn’t too enlightening because many reviewers don’t know much about the technology, so they are reacting to what the interface looks like or the fact that they don’t know what auth user name or proxy is, which would impede them in getting the client to work.

The main trouble I have had so far is the microphone that is a part of Apple’s $30 headset. If I can figure out how to keep that facing me, I think things will work better