When you talk about debugging with a simulator I assume you are thinking about targeting a mobile device, so correct me if I'm wrong. One of the strength of Qt

When you talk about debugging with a simulator I assume you are thinking about targeting a mobile device, so correct me if I'm wrong. One of the strength of Qt when developing for mobile devices is that you can develop your app on the desktop and debug it there (to a point), and then deploy to the device and tweak. Of course, when you start using device specific features you will have to go in hardware or a simulator. At the moment the EPOC emulator which comes with the Symbian SDK leaves a lot to be desired. Many of the phone specific features (like sensors or location) are not supported, so you will have to goto hardware for those anyway. Unfortunately, I don't know what the plans are with regards to simulator for Symbian. That said, debugging in target from Qt Creator is quite often nice. The problem comes when Qt Creator simply says that you have a Generic OS related error, then you are pretty much stuck. Hope that helped answer some of your questions.