Home > How to:, Nokia, Qt > How to: Porting Apps from iPhone and Android to Qt

How to: Porting Apps from iPhone and Android to Qt

Got an Android or iPhone App? Want an even larger audience and another distribution point? Port to Qt and get your awesome app on the Ovi Store. Forum Nokia has a helpful page on their Wiki detailing instructions on porting Android and iPhone apps to Qt.

The page was updated last in June, so now Nokia have 24 Million smartphones, and 41% of the GLOBAL smartphone market share (up from 40% and 21 million). Today, OPK mentioned Nokia expects 50 Million Symbian^3 devices to be shipped over next few years (though what exact time scale is not mentioned) Now also note the possible Millions of MeeGo devices, not just from Nokia, but from the 20 partners lined up to make MeeGo devices. Plus there’s the Maemo 5 crowd (N900 users).

The programming language for Qt is C++. Modern classes and functions that are familiar from other technologies make it extremely easy to adapt to this language. If you are experienced with the Objective-C or Java™ programming language, you will have your first Qt C++ project running within hours.

Qt C++ is ideal for application logic, and the script-like Qt Quick speeds up the creation of advanced user interfaces. You can also write native platform code and call it from Qt, to reach each and every feature of the device.

Selecting one approach does not tie your hands. You can freely code the network functionality with low-level Qt and make things look smooth with QML and scripts.

Qt provides all modern classes and functionalities familiar from iPhone and Android. This makes it easy to keep the application logic close to the original when porting

How to Proceed with Porting

WordPress Developer Story

As linked above, this is a neat one to take a look at as it’s first hand example of porting from iPhone to Qt.

To make a long story short, it is easy to keep the original structure of the application when porting from iPhone to Qt. You can directly rewrite the core code to Qt just by looking at the original source

Compared to many other platforms, tweaking of the UI is incredibly quick. You can set values, launch it on the desktop, and, if it looks good, add to the device style sheet and deploy for verification’

Forum Nokia Via @bperry


  1. Roger Johnson
    July 22, 2010 at 6:32 pm

    This is excellent, i’ve been wondering how developers would do this as easily as possible.

    Does anyone know of any iPhone or Android to Qt source code converters or is a manual rewrite essential? I can imagine logic can contest easily and many API calls converted to equivalents in Qt.. or not?

    • Roger Johnson
      July 22, 2010 at 6:34 pm

      Contest easily? I meant convert easily! That’s wriat happens typing in predictive text on your phone 😉

  2. Andre
    July 22, 2010 at 6:56 pm

    And so it begins, Qt is going to take over the world!!! jk jk

    • Keith
      July 22, 2010 at 7:49 pm

      Amen to that! Lolz
      Qt is the future man.
      Sym^3 Sym^4 MeeGo = destruction of iOS and Android and Nokia regaining their prestige in the high-end smartphone market!
      Nokia FTW!

    • Keith
      July 22, 2010 at 9:47 pm

      Hey Andre, my idea just got approved on ideas.symbian.org
      Its about browser improvements and a redesign of keyboard including pop-up style keyboard with multitouch. here’s the link:
      http://ideas.symbian.org/Idea/View?ideaid=8503

      • joegami
        July 23, 2010 at 2:40 am

        Already voted for your idea Keith. As we know there seems to be a new version of the symbian browser in the works but let’s hope they can implement some of your suggestions.

  3. John Wiegand-forson
    July 22, 2010 at 8:23 pm

    Good, this is good step in increasing the number of interesting apps of for the Ovi store it seems like Nokia are doing everything to increase the number of quality apps for the Ovi store quietly behind the scene

  4. N#O#R#U#L#E#S
    July 22, 2010 at 9:41 pm

    fantastic! that mean all the best selected apps AND GAMES OFF COURSE for android and iphone shall get a easily porting to symbian/meego!! GO QT 😀

  5. Yougo
    July 22, 2010 at 11:29 pm

    Awesome news, so apple will lose appstore advantage in the near future,

    old apple advantages
    multitouch advanatge
    appstore advanatge
    ui advantage(s4 and meego)

    new nokia advantages
    cheaper price
    more complete hardware features
    more powerful os

  6. July 23, 2010 at 4:37 am

    wow super cool rocking news so qt gives more applications than others.
    i saw in news
    2.5million downloads available for iphone
    1million for android
    past 6months android applications are increased very fast

  7. July 23, 2010 at 4:40 am

    oops i forgot
    so we will have more apps than android and iphone
    🙂

    • Keith
      July 23, 2010 at 4:57 am

      It’s NOT 2.5 million, it’s 250,000 apps for iPhone and NOT 1 million, but 100,000 apps for android. And yes, android market has gotten about 50,000 more apps in past 3-4 months. It’s crazy! But with Qt on symbian and meego and Meego just being around the corner, I hope OVI store will have more apps that are actually awesome!

      • Jim
        July 23, 2010 at 7:32 am

        actually iphone and android has this huge number of apps because they don’t support flash(since android 2.2). plus a lot of iphone apps are books converted as apps. I hope ovi store will not accept this type of apps, and make me search through millions of crappy applications.

        About porting it;s not that easy as you think. yes they show you some small , simple examples, but making a port for a large software may take some time and resources. companies will port their programs only if they see a huge potential in ovi store. Also a lot of applications target US traffic so even if ovi store has a huge number of downloads, they are interested more in the number of downloads for a certain region( US in our case)

  8. Yougo
    July 23, 2010 at 5:08 am

    Ovi store is what nokia should now work hard on! Dumb people like app and games and are not willing to go somewhere else to look for app and games

  9. Yougo
    July 23, 2010 at 12:17 pm

    What are the selected iphone games and apps that should be ported to nokia platform?

    Is it us or the original developers to do this job?

  1. July 22, 2010 at 11:52 pm
  2. December 23, 2010 at 7:50 am

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