Qt pricing (most up to date) [closed]

Question

I am thinking about using QT for rich GUI commercial multiplatform programs. A would want to know how much the commercial license would cost.

I found just old prices (2008): https://stackoverflow.com/questions/352896/qt-commercial-licenses

1. I am interested for the actual price (even earlier to see how it rises) for: win+osx

2. The license is one time or I have to buy license yearly?

3. Is there anyone who uses the LGPL version commercially? (I know that it can be done but I might need to make changes to QT without releasing the code for it: https://stackoverflow.com/questions/2945612/qt-lgpl-licencing-for-a-free-application-with-closed-source)

4. Actually this price policy (We don't tell you the price! We will call you!) is really strange to me, should I rather stay away form QT? I just tried it (15-20 hours) so going with other technology (.Net and just for Windows by dropping multiplatform support) is still an option

Answer 1

I'm no lawyer, so I'm not an expert in this area. I just wanted to point out that you can still develop closed-source software using an LGPL license. The catch is that you can't edit the Qt libraries without releasing the changes under LGPL.

Related SO thread: https://stackoverflow.com/questions/94346/can-i-legally-incorporate-gpl-lgpl-open-sourced-software-in-a-proprietary-cl. Read the top answer to that question, there is a much better explanation there.

Unfortunately I can't help you with the pricing, but if you're not altering Qt itself then you may not need to pay for it at all.