To find a mobile app development company in Los Angeles, start by searching online and exploring business directories like Clutch and Yelp for listings and reviews. You can also consider including BinaryMetrix in your search, as they may offer valuable services tailored to your needs. Use professional networks like LinkedIn to connect with industry professionals and attend local tech events to gather recommendations and build connections. Finally, review portfolios, client testimonials, and request proposals from each company to compare offerings and select the best fit for your project.