Whether it’s Parkour classes in Seattle or seaplane rides in Key Biscayne, Fla., with Peek, scheduling your next adventure is easier than ever. The app features thousands of tours and activities in 17 U.S. cities, along with London and Paris, with options vetted by travel experts. That urban art tour of Chicago isn’t up your alley? Peek offers a personality quiz, then searches for alternatives that match. Free, www.peek.com