iPhone it's called camera timer and I believe it was free 2 years ago when I downloaded it. One nice feature about it that I didn't realize until last night, is has a multi shot feature. Take up to 30 shots after setting the count down and can space it from 1 second way up. I took 5 different shots last night trying to move between each. For a tripod I stood my binoculars on end and pinched the phone between the eyepieces. Redneck ingenuity Not sure how to post links to App Store but its camera timer. It can't get any easier