Niconico Comment Grapher is a free Chrome add-on developed by asmka. It allows users to draw a graph of the number of comments on the seek bar of Niconico videos. By visualizing the comment count, users can identify the most active parts of the video.

This add-on is especially useful for identifying the highlights and engaging moments of videos. It provides insights into the areas where the audience is most engaged, allowing viewers to skip to the most exciting parts.

Niconico Comment Grapher is available on the Chrome platform and falls under the category of Browsers, specifically the Add-ons & Tools subcategory. It is a valuable tool for Niconico users who want to quickly navigate to the most interesting parts of videos based on the comment activity.

Please note that the developer's information and contact details are not provided in this review.