Is there an app to turn on/off a krell interg amp?

Did either piece of gear come with a remote control? If so, you have a chance. If not, you're out of luck. And I don't see a reason why you'd want to turn off the power conditioner. It shouldn't be doing anything that consumes extra power over what's being pulled through it.

You'll need something that has an IR receiver and 12V on/off triggers for the power condition unless the Krell has a 12V trigger and it can be controled via a IR command to the Krell. You might get lucky and find an app for the Touch that can control the Krell. You might have better luck contacting somebody who does remote control apps and send him the Krell commands if they're in the manual, or you can get Krell to give them to you.