Will Creation App Development

I need a straightforward app that lets users create legally valid wills right on their phones. The core service is will creation, not general repairs, so every screen and workflow should revolve around guiding someone from start to signed document with as little friction as possible... (Budget: $30 - $250 USD, Jobs: Android, App Development, iPhone, Mobile App Development, Payment Gateway Integration, Software Architecture, User Experience Research, User Interface / IA)