MAL Heatmap is a tool for tracking your anime/manga consumption based on your myanimelist.net history.
MAL only keeps the last three weeks of your history available to other users. After this time, they'll hide all activities older than 21 days. When you subscribe your profile, we'll save your history daily, so you can look back and see all your activities aggregated day by day.
We also generate an image of your activities calendar that you can embed into your myanimelist.net profile or forum signature extending your MAL experience.
We download and store publicly available data related to your myanimelist.net account, which are: profile information (username, avatar url, location) and the current history (episodes watched, chapters read, historic datetime, anime/manga name and url).