On 28/05/15 22:16, Pierpaolo Bernardi wrote:
> On Thu, May 28, 2015 at 12:33 PM, Cheng Tan <noi...@gmail.com> wrote:
>
> > Hi stellarium developers and users:
> >
> > Recently I found an app in Mac app store whose icon and UI screen shots
> > look highly identical to stellarium.  And it costs nearly $20!
> > I guess this is serious abuse of GPL licence?
> >
>
> Why?
>
> (Assuming that App is indeed Stellarium) GPL certainly allows to sell GPLed
> programs. As long as they satisfy the requirements of the GPL, they are
> doing nothing wrong.

(not a dev, but wanted to step in)

Precisely, but it seems that they *probably* do not.

First, there is no mention of GPL license, nor any copyright notice on
the website. Such a notice *must* be distributed with the app.  It is
possible that they distribute it with the app, though.

Second, it is not clear if they distribute (or let people get it)
their source code with the application (as GPL requires). Maybe they
do.

Third, it's not clear whether distributing GPL via App Store
is actually doable. This link [1] is an old one, but it may still
apply. Also Wikipedia [2] is quite direct about it.

I'd contact Apple to enquire.

Tomasz

[1] https://www.fsf.org/blogs/licensing/more-about-the-app-store-gpl-enforcement
[2] https://en.wikipedia.org/wiki/Mac_App_Store

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