It won't let me see the link you've posted as I'm not in the US, which is annoying!

I've come across two DBT apps. The more expensive one is the one my T's NHS DBT service is using with all their clients. I've looked at it a bit on her phone but don't know it well.
(again I can't view this link, but from the google preview this looks like the app)
http://itunes.apple.com/us/app/dbt-s...458300012?mt=8

I bought the cheaper one, which has just had a massive overhaul and I'm finding it really helpful. As well as allowing you to fill in your diary card, it's a great reminder for skills, and even provides some basic coaching in terms of walking you through situations. I'd say that to get the most out of it you have to spend some time personalising/programming it though- adding your own targets and skills, adding your own ideas and contacts, songs etc. I'm a big fan of anything which makes the skills more portable. That's when we need them most- when we are out and about in real life. Back in my pre-smart phone DBT days I used a mini 'brag book'/photo album to make my own reminders, but this is much more discreet and interactive.

http://www.diarycard.net/