On: Stockholm parents built their own school app, then...

[SilasX]

Illegal on what basis? Data privacy, like in the story or something else?

[psyc → SilasX]

I believe most if not all of it would have boiled down to data collection rules for kids. Some of that may have been specific to schools. The extent of those rules meant you could not simply bring the app into compliance without destroying a lot of the innovative parts.