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  1. #1
    Registered User
    Join Date
    Jan 2009
    Posts
    19

    Qt S60 Licensing

    Hi all,

    I am still confused with the Qt licensing scheme. Will it available free for developing commercial application? If not how much is the licensing price?

    Many thanks.

  2. #2
    Registered User
    Join Date
    Dec 2006
    Posts
    2,280

    Re: Qt S60 Licensing

    From Qt 4.5 onwards, Nokia is licensing Qt under the LGPL v2.1 for all platforms, that includes Qt for S60.

    As long as you can comply with the terms of the LGPL v2.1 then yes, it's free. If you're not modifying Qt and can link dynamically to the Qt libraries then it should be fairly easy to comply with the terms of the LGPL.

    Mark

  3. #3
    Regular Contributor
    Join Date
    Jul 2008
    Posts
    416

    Re: Qt S60 Licensing

    Please can anyone be a bit more specific about commercial licensing. I have read in the enclosed license (TECHNOLOGY PREVIEW LICENSE AGREEMENT: Rest of the World):

    5. PRE-RELEASE CODE

    The Licensed Software contains pre-release code that is not at the
    level of performance and compatibility of a final, generally
    available, product offering.
    The Licensed Software may not operate
    correctly and may be substantially modified prior to the first
    commercial product release, if any. Nokia is not obligated to make
    this or any later version of the Licensed Software commercially
    available. The License Software is "Not for Commercial Use" and may
    only be used for the purposes described in Section 4. The Licensed
    Software may not be used in a live operating environment where it may
    be relied upon to perform in the same manner as a commercially
    released product or with data that has not been sufficiently backed
    up.

    Can anyone explain the highlighted lines. Additionally rumor has it that if developing commercial products the company has to purchase a commercial license for 3500 Euros. I have not developed with Qt before, so simply it could be a price of commercial license for Qt library (as it would be for Windows).

    Does the commercial license for Qt library noted here apply also to Qt library for S60 (the paragraph above is from LICENSE.PREVIEW.COMMERCIAL file in 4.5.0 garden)?

    Citation:
    If you're not modifying Qt and can link dynamically to the Qt libraries then it should be fairly easy to comply with the terms of the LGPL.
    Is this in contradiction with the statement here or not:

    Qt Commercial License

    The Qt Commercial License is the correct license to use for the development of proprietary and/or commercial software with Qt where you do not want to share any source code.

    You must purchase a Qt Commercial License from Qt Software or from one of its authorized resellers before you start developing commercial software. The Commercial license does not allow the incorporation of code developed with the Qt GNU LGPL v. 2.1 or GNU GPL v. 3.0 license versions into a commercial product.

    So from the description above it looks clearly the developer should purchase the commercial license - even the Qt library is not modified, just linked.

    Update: Quite interesting insight is here.
    Last edited by elviin; 2009-04-29 at 09:06.

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