1. E-commerce Platform: Build an online marketplace.
2. Health & Fitness App: Track workouts, diet, goals.
3. Social Media App: Connect with friends, share content.
4. Education App: Online courses, quizzes, learning tools.
5. Financial Management App: Budgeting, saving, investing.
6. Gaming App: Develop fun and addictive games.
7. Productivity App: Task management, time tracking, focus tools.