Startup app ideas that leverage the gig economy could focus on connecting freelancers with short-term job opportunities. For instance, an app that connects local handymen, cleaners, or delivery workers with people in need of these services could be valuable. Another idea is a platform for specialized freelance skills, such as writers, coders, or designers. Apps that facilitate payment, schedule management, and client interactions help gig workers streamline their business, making them crucial in the growing gig economy landscape.