When Madeline Heckman decided to move from the Upper West Side to Brooklyn last year, she knew exactly where to start her search: with StreetEasy. “I honestly didn’t bother looking at other alternative apps,” she said. The interface was user-friendly, the entire city’s listings were there, and her previous website of choice, Naked Apartments, had shuttered in 2020. She ultimately found the place of her dreams, a two-bedroom with a walk-in closet in the Prospect Heights neighborhood of Brooklyn. Heckman is in good company. Ask anyone in New York City how they found their apartment, and the answer is a no-brainer: in 2022, StreetEasy might as well be the city’s…