The Qt commercial licenses allow publishing to the Apple AppStore or other stores including those that require static linking. If you need technical support related to building Qt from source codes, at the minimum, Standard Support offered by The Qt Company is needed.
Standard Support is included to our term licenses. If you need technical support for your modified Qt libraries, Premium Support offered by the Qt Company is required. Distribution of Qt libraries in binary form in conjunction with the developed application is allowed under the Qt for Application Development license agreements. A separate agreement is not needed. The platforms for which you have the right to distribute are listed in your license certificate in your Qt Account.
With a term license of Qt for Application Development or Qt for Device Creation, you pay a recurring fee during the time you develop with Qt and distribute the developed applications.
You receive all updates and will be able to access online systems. After the term ends, you are no longer entitled to develop with Qt or further distribute the applications developed with Qt.
Applications already distributed can be used, but not maintained. This is subject to a distribution fee, please contact us for more information. Note that the License Manager can reassign a license only once within six months. If you are a subscription license holder, your rights to continue using the tools, APIs and libraries or access to any updates will expire when the subscription expires, or the subscription is cancelled. You will not have the rights to future development.
Distribution of Qt libraries in binary form in conjunction with the developed application is allowed. You can Upgrade Your plan as a self-service in your Qt Account Portal payments page, by clicking the necessary license shown in the Upcoming Payments section. To purchase additional Qt for Small Business licenses when you already have at least one:.
The eligibility verifications are the "automated audit" inquiries referred to in our Qt for Small Business webpage, which are designed to:. The first eligibility verification occurs within the thirty 30 days of your initial purchase.
There is then annual eligibility verifications which occur within sixty 60 days prior to your license renewal. This is to properly validate your eligibility as a business and ensure you are within the revenue threshold. If you are a recently registered business, please respond to the eligibility verification email and a License Management Specialist will work with you to determine the best course of action.
To ensure the security of your financial documentation for the Small Business eligibility verification, there is a limited number of team members who are trained to receive and review this information. We encourage you to redact any Personally Identifiable Information PII which is not pertinent to the validation of your business name, business address, VAT, revenue, and funding. Please coordinate with your License Management Specialist prior to sending any documentation to ensure your privacy expectations are met for the eligibility verification.
Unfortunately, this means we will need to suspend your license access and then cancel the subscription to prevent the next renewal from occurring. This form is designed to help us understand what type of product you are building, how many developers you have, and validate our system records. This form helps us ensure you have purchased the right type of software for your product development, as well as help in determining if and when you may need to purchase Distribution Licenses.
The following terms and conditions apply to holders of a Qt for Small Business license:. Am I eligible? We are looking forward to seeing what greatness you can achieve with Qt in the months and years to come: Get Qt for Small Business. Qt for Small Business Everything you need for your software development lifecycle.
As long as you can comply with the L GPL requirements of the Qt libraries, then you do not need to purchase a "commercial license" from the Qt Company. Note that the terminology "commercial license" is a bit ambiguous, because the L GPL license also allows 'commercial' use as long as you can follow the obligations. Basically what this has been interpreted to mean is that if you distribute LGPL libraries such as Qt with your application, then you also must:. Distribute to your users the source code of the same version of that library, or make it available in a way that is conformant with the LGPL license.
Make it possible for a user to use a different version of that LGPL library with your application. In practice this means that you must use dynamically linked libraries for the LGPL library i. In practice it also means that on platforms like iOS and Android, LGPL is not really usable because these platforms apparently do not allow users to replace the libraries with another version.
If you don't want to release the source code of your whole application, you must avoid distributing GPL applications in a way that combines it with your application. To be safe it would be best not to distribute the GPL components at all together with your application. If the code you write for this application is owned by your employer and is only provided to your colleagues to assist them in their work duties, then the application is not being distributed according to copyright law.
This means that the requirements of the LGPL license don't trigger and you have no obligations to comply with those requirements. If the application gets distributed to a different legal entity this could be within the same corporation, depending on how it is legally organized!
You can use open source Qt. I think you can use GPL components too. It's hard, but not impossible. Sign up to join this community.
The best answers are voted up and rise to the top. The commercial Qt license gives you the full rights to create and distribute software on your own terms without any open source license obligations. With the commercial license you also have access to the official Qt Support and close strategic relationship with The Qt Company to make sure your development goals are met. Qt tools and some libraries are only available under GPL.
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