Qt license commercial applications

I thought that was fine as long as the source code was distributed with the application. As I understood Qt's licensing, you are allowed to license your application seperately from the Qt part as long as you stick to dynamic linking and you have the obligation to share the Qt source code and any changes made to it.

And all of this by just using the open source license. WoodenGolem Different parts of Qt have different open source licenses. No open source license forbids commercial use, though many licenses have clauses that make commercial use unattractive e.

For details about how open source licenses work, consider asking on Open Source. Yes it is true that this is a "commercial" application, but this answer feels like it comes from someone who has never even skimmed the GPL or LGPL, both of which explicitly allow 'commercial' applications as well, as long as you follow the obligations of those licenses.

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Open Source is leaving beta. Related Hot Network Questions. Hi, so if i use Qt Open Source and do dynamic linking do i still have to make my source code available? You do not. To use static , you would have to make a static version so its not something you would ever do by accident. Static Qt build for closed source application. Support from the Qt Company. Prioritisation of your bug reports.

No need to publish your Qt modifications if you did any although it would be very nice. Some additional tools and modules that you may find useful that are not in the OpenSource project.

I want to verify what understood by me. I am developing my application using embedded board which already have open source distribution with QT library. Am i right? The Qt for Application Development license is sufficient to create applications that run on desktop PCs, mobile phones, or tablets.

These kinds of computers are typically used also for reading email, browsing the Internet and so on. A Qt-based application is only one of many applications on these computers. The main use case of these computers is not dedicated to the use of your Qt-based application.

Contact us to learn more. All commercially licensed Qt versions allow modification of Qt libraries. No, it does not. Qt libraries may be distributed in binary form only with the application.

Each developer must have their own assigned Qt license. You are not permitted to further distribute your applications. Locking of devices, also known as Tivoization, is allowed under the commercial license. Yes, unlike some open-source setups, static linking is allowed with a commercial Qt license.

Please contact Qt sales for discussing the best possible upgrade choice. The commercial evaluation term period varies depending on agreement with your account manager and is typically days. During that time, you can develop with Qt, but you are not allowed to distribute your applications before you purchase a paid license. After the free trial period, you need to either purchase a license or cease from using the free trial. With Qt for Device Creation , you can create embedded devices with modern UIs with maximum performance.

In addition to Qt APIs , it comes with a full embedded tooling suite built around the Qt Creator IDE , and additional embedded solutions that help you reduce your time-to-market dramatically. Qt for Device Creation is a product available only under a commercial license. In addition to creating individual applications or devices, Qt can also be used to create full software platforms and the Qt developer offering can be extended for a custom distributable SDK.

For this purpose, we provide a custom SDK licensing option.