Differentiation comes from innovation and user experience for startup app ideas. Analyze your competitors and identify their weaknesses or areas where their apps fall short. Focus on solving these gaps with unique features, better design, or improved functionality. Offering personalization, faster performance, or seamless integration with other services can also set your app apart. Another way to stand out is by delivering superior customer support, regular updates, and engaging users through feedback loops. Building a strong brand identity, using creative marketing, and leveraging social media can further differentiate your app in a crowded market.