I've built this product because of of my writing activities, I used to record my daily activity in a notepad including the to-do list for the day, But It's really hard to find what happened on a specific date because it's a physical note book, a lot of books.
That's how I came up with this idea to record notes and to-do list integrated with a calendar and I wanted all the feature in a single page. I should not have to navigate other page to do anything.
Let me know your thoughts.