The getting started page for v4.0 is available here. The tutorial page for the smartphone App for v4.0 is available here.
The changelog of In/Out is accessible here. Software releases are scheduled every month, dated the day of the month number (01/01, 02/02, 03/03, 04/04...). Version of firmware is composed of dashes (2024-04-04) while version of smartphone App is composed of dots (2024.04.04).
The current 2024-04-04 (April) firmware release brings a lot of fixes and the ability to upgrade over-the-air (instead of via USB) the future firmware of the Net Device. There are known issues for the court calibration and line calling. This will be fixed during the month of April and should be part of the next 2024-05-05 (May) firmware.