Hello,
I would recommend building the application using Xamarin where we can easily target multiple platforms with good performance and efficiency.
I have worked on a couple of similar applications. Please find the details of a recent calendar application I had worked on:
Microgoal Setter Application
• A simple, beautiful, and easy-to-use user interface
• Time and location reminders
• Repetitive (daily, weekly, monthly) reminders
• Assign tasks for a specific time
• Task categories with different color for each task category
• Custom reminder repetition patterns (every x days, weeks, months)
• Calendar view
• Reminder synchronization between all your devices
Users can use the application as a calendar, task list, checklist for a daily planner, day scheduler to reach their goals
Looking forward to your reply. It will be good to have a direct discussion, to understand your requirements in detail.
Thanks,
Moble J