Startup Idea: Comprehensive Calendar and Scheduler App

Startup idea to develop a comprehensive calendar and scheduling software. The software will integrate work, personal, and task-based calendars, incorporating reminders for scripts or schedules, modifying to remove the need for multiple apps.

I'm currently unemployed but I have a degree in Information Technology. My calendar is in desperate need of an upgrade, & I would pay up to $100 for quality software. I have multiple appointments, interviews, personal appointments, my child's appointments, and my script schedule. Software that could combine a work calendar, personal calendar, to do list, and scripts and schedules for would be beneficial to me instead of having multiple apps.