I love the UG app and the Songsterr apps. I've recently found a decent app where I can write my own tabs into it. The only problem I have is that you can't combine all three of these apps. I'd be happy to find an app I can write my own tabs in, and have them played back. If anyone knows of something like this, let me know. But in the long run, what apps or cpu software do you all find useful?