I am on the fence about your product. I really enjoy the single pane view of tasks, the ability to see metrics on personal goals, tab groups based on my role for the moment, and the ability to have beatiful imagery and encouraging messages. However, I feel that microbusiness productivity today requires using ONE set of storage for all activity and have decided on GSuite.
If you would make the notes interface with Google Keep then I think you could seriously increase your market penetration for individual users. Considering that Gsuite is a complete ecosystem and that as of October 2018, there were 1.5 billion Gmail accounts, you should consider integrating with all Google products.