Don’t let George Knight’s age or flip phone fool you. This 95-year-old is wading knee deep in a technology boom that’s spreading throughout retirement communities across the country. Thanks to a phone service called GoGoGrandparent, Knight, who lives in downtown Sarasota, is using the same on-demand ride sharing apps as his smartphone-savvy children. Knight is like many seniors his age. He gave up his keys. Nowadays he takes Uber or Lyft rides to and from doctor’s appointments. He even rides over to Dry Dock Waterfront Grill on Longboat Key for the grilled grouper. But maybe the best part of it all, for him, is there’s no app. GoGoGrandparent, a California-based company, is just a hotline. Knight calls a phone number and selects from a simple menu of automated choices. GoGoGrandparent handles the rest. “It’s so convenient for me,” said Knight, who started using GoGoGrandparent two years ago. “It was just a ray of sunshine when I found something like this.”