Mike Snider, 63, a journalist in Vienna, Virginia, uses a handful of these apps, including one that reminds him of favorite beers he has sampled. “Several times I’ve used Untappd to look up a beer, only to find I’ve had it before. Depending on my rating, I know if I liked it or whether it was just OK,” he says. “That helps me to not get something I may not like and advises me when not to miss out on a beer that impressed me in the past.” —Chris Morris