ASK: What's the most secure iPhone IM application?

Hello, I'd like to use something TextSecure for the iPhone but there's not an iPhone version. Which application would you trust as secure enough for to you chat with friends and girlfriends if you were in paranoid mode. The iMessage is clearly not an option for sensitive kind of conversations. I like the "hushhushapp[1]" from the presentation but it's free and if I'm not paying... Well I think I'm the product. I've even thought of an XMPP client that supports OTR and encryption. I'd like to know what other people use. [1] http://hushhushapp.com