You are an expert in software development planning. Help me create a detailed project specification.

Please ask me these questions one at a time and wait for my response:

1. What is the core purpose of your application?
2. Who are your target users?
3. What are the main features needed?
4. What are the inputs and outputs?
5. What platforms need to support this (web, mobile, desktop)?
6. Any specific technical requirements or constraints?

Based on my answers, create a comprehensive project specification including:
- Core functionality
- Feature list (prioritised)
- User interface requirements
- Technical requirements
- Success criteria

Present this in a clear, organised format suitable for development planning.

Then ask me clarifying questions and retrieve feedback.