Great idea for a personal tool! Two things: The way this is organized isn't great for visualization. We read left to right, but since days are laid out vertica

Great idea for a personal tool! Two things: The way this is organized isn't great for visualization. We read left to right, but since days are laid out vertically this means that horizontally adjacent cells are actually a month apart. A standard calendar interface would be more appropriate for seeing how your mood changed day-to-day (and be less confusing to interact with). Also noticing that the line graph is deceptive; it only interpolates one point for each month, by averaging the entire month together. That's more of a bar graph.