Have written an iPhone version, but have a question

Hi,

Firstly, apologies if this isn't the right location for this post.  I'm unclear if it's ok to go here, but here goes anyway...

I have written an iPhone version which is in final testing, and was planning on getting this on the App Store but ran into a hitch.  The issue is that I didn't realise that Apple actually wants and annual fee to have my app on the store even though it's free!  So I wanted to add a small ad banner at the bottom to try to recoup some of the cost in an Apple developer license as required for me to put it up on the store.  

This leads me to ask if this is considered ok for me to do, or is this technically violating the 'nobody is allowed to ask payment for SuperGenPass' condition of use?  The code is all my original code but is still an implementation of SGP so I think it's only fair to ask if this is ok to do rather than just assuming so.  If this is a problem I'll probably refrain from putting it on the App store as I philosophically oppose this Apple tax for a start.

I also just want to say a big thanks for making SGP in the first place and also thanks to everyone who has created ports!  I use the excellent Android version often (and submitted a small addition regarding the password salt/stealth password quite a while ago and the owner of that project was very accepting of the addition and quite helpful!).

Thanks!

That's great!

The short answer to your question is that SuperGenPass is GPL'd, and the GPL does not prevent commercial use. It does, however, require derivative works to adopt the GPL license and release their source code.

In plainer English: I am not a lawyer, but as far as I'm concerned, using ads to recover the Apple tax is both morally justified and allowed under the GPL. Releasing your source code under the GPL is probably required, but I am not a litigious person and I think ports are cool.

The note in the FAQ (about notifying me if someone is charging for SGP) is not a legal stipulation, just an informal alert system for me. If someone were charging a significant amount of money for SuperGenPass, I'd probably make an effort to inform their userbase that there are free alternatives.

I look forward to seeing your app!

I'm doing the same thing, but with the exact HTML/JS code that the "Mobile" page uses, plus two 2 line breaks. I'm a registered Apple Developer, and my app is working fine. Would it be ok if I charged $0.99? No ads. And you can do a free app, and collect on the ad money. Or does that break GPL?  

TIA,
Patrick Bailey

Just finished up my first go at a native cocoa version for the desktop.  I still have a few bugs to work out and new features to add, but I was hoping to follow the $0.99 for a few months or so path, and then set the app to free forever after that. I'm planning on cleaning up the code and posting it to github next weekend with all the proper licensing.

Any objections or concerns?

I am not an expert on the GPL and don't want to be. In my opinion, as long as release your source code, you are doing the right thing.

Well, here's the mobile version given away on this site, but in a native app.....

http://itunes.apple.com/us/app/supergenpass/id451606360?ls=1&mt=8