Явка-онлайн is a free Chrome add-on developed by Патентный поверенный Евгений Берлин. It serves as a notification tool for online court sessions in arbitration courts.

One of the drawbacks of the online court session service is that it doesn't provide notifications when a session starts, requiring users to manually monitor the case page for the appearance of the session link. This add-on solves that problem by emitting a sound signal whenever a session link appears and automatically turning off the sound when the link is clicked.

With Явка-онлайн, users can now stay informed and never miss the start of an online court session. It is a convenient tool for anyone who regularly participates in arbitration court proceedings.