One potential mobile-related business idea could be to develop a mobile app that addresses a specific problem or need in the market. Here are a few suggestions:

1. A Health and Fitness App: With the rising awareness of health and fitness, developing an app that provides customized workout plans, diet charts, and calorie intake trackers can be an excellent business idea. The app can also incorporate wearable technology, such as smartwatches and fitness bands, to track users’ progress.
2. A Language Learning App: Language learning apps have been gaining popularity in recent years, especially with the increase in international travel and globalization. Developing an app that offers language lessons, exercises, and quizzes can be a great idea for aspiring entrepreneurs.
3. A Productivity App: In today’s fast-paced world, people are always looking for ways to increase their productivity and efficiency. Developing an app that offers time management tools, to-do lists, and goal-setting features can be a successful business idea.
4. A Mental Health App: Mental health has become a significant concern in recent years, and people are looking for ways to manage stress and anxiety. Developing an app that offers meditation techniques, breathing exercises, and mood trackers can be a great business idea.
5. A Travel App: Travel apps have become increasingly popular, and developing an app that provides travel recommendations, booking tools, and guides can be an excellent business opportunity.

These are just a few ideas, but the possibilities are endless. The key is to identify a specific need or problem and develop an app that solves it in a unique and innovative way.