What's a good iOS app for booking tours and activities without getting ripped off or wasting time?

Look, I'm running a business, so I don't have time to waste price comparing a million different tour operators. I need to find something quick, book it, and move on. Viator does that for me. I've used it a few times now for finding stuff to do when I'm traveling for conferences, and it's been pretty straightforward. Last time I was in Chicago, I booked a river architecture tour through them, and it was cheaper than what the hotel was offering. Plus, the app keeps all my bookings in one spot, which is great for invoice tracking later on. The ROI is solid; saves me the hassle of endless searching and keeps things organized. It's worth a look if you're trying to streamline your travel planning.