Smartschool Message is a free Chrome add-on developed by MatseVH. It falls under the category of Browsers and is specifically listed under the subcategory of Add-ons & Tools. This add-on allows you to play a harmless prank on your friends by displaying a message badge on your Smartschool account, even if you don't have any new messages.

With Smartschool Message, you can easily trick your friends into thinking that you have received new messages on your Smartschool account. The add-on creates a realistic-looking message badge, giving the impression that you have unread messages waiting for you. Whether you want to pull a prank or simply have some fun with your friends, Smartschool Message provides a quick and easy way to do so.

Please note that this add-on is intended for entertainment purposes only and should not be used to deceive or mislead others in any harmful or malicious way. Use it responsibly and with the consent of the people involved.