as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
generate 4 ideas for a mobile application.
user
1. a social media platform that uses machine learning to tailor content to individual users
2. a platform for users to post and organize virtual events 
3. an app to help users find and book activities in their city 
4. a virtual assistant that monitors an individual’s physical and mental health
assistant