Example:
https://play.google.com/store/apps/details?id=com.macoou.feedbrowser
Someone has started a new repo for tracking these: https://github.com/ssddanbrown/Open-Source-Confusion-Cases
Not really reporting but, can spread awareness
Edit: "someone" is the developer of BookStack
I really wish there was a government institution that would care about that
Depends what nation you are in and how you obtained it.
Anyone can release software under any licence. As long as they are not breaking the licence they release under. Or the licence they use any 3rd party code is under
I do not think GPL has any rules about claims. Just actual actions. But if they released in under another licence. Then it is possible. (But unlikely). The licence has such rules.
So in most cases. Actual actions or lack of rather then claims. Based on the licence is your only option. And that would mean contact he authors of any included code. Or FSF etc.
Some nations have advertising rules. Depending on how and where it was obtained you may be able to contact their advertising standards association equiv.
But providng for free can often weaken this. Although it is likely far from an absolute excuse to false advertising.
I don't see where it claim to be open source, but it's permissions are.... Interesting.
- where does it say its open source? I do not see this anywhere. what is the stated license?
- assuming it does say this somewhere, have you attempted to contact the developer to request the source code? for example here https://app.macoou.com/inquiry What was the result?
if yes to the above and no resolution:
- could try reporting via whatever google's mechanism is; "flag as inappropriate" i guess
- could contact the SFC https://sfconservancy.org/copyleft-compliance/ they are the only org I am aware of that does this kind of thing as a general activity; I doubt they would be interested in this little hobby project-looking dev
- if the dev is using FLOSS code, for example which was published under GPL, and they are not complying with the license in redistribution, then you could notify the devs of the GPL code
- if you wish to pursue the matter independently you will need to find about about the dev's local jurisdiction and how to carry out a legal action there. looks like that would be japan.