Business Management Mobile App Development -- 2

I need a mobile app to manage business tasks and information. The app will primarily serve customers, clients, managers, and business owners. Key functionalities include: - Tracking jobs, tasks, or projects - Managing customers, bookings, or appointments Ideal skills and experience: - Mobile app development expertise - Experience with task and project management features - Proficiency in customer management systems integration - UI/UX design for a user-friendly experience - Knowledge of security protocols to protect business data Please provide a portfolio with similar projects.