Freetrack software is in some ways as easy as trackir, but in some other ways not. All in all, the software is a good one.
I haven't used mine for years because of the hardware. You have to invest some time to built up a good ir-led track clip and u need to information about the best working cam. There are some cams out there, which can compete to the trackir camera in terms of resolution and fps, but mostly not in terms of wide field of view or angles. And it is difficult to setup the camera for just noticing ir leds and not other things around.
My suggestion ist overall: trackir is the better solution. You will only come close to it, if you really spend some money and days to build a really good setup. And the degree of freedom could be a problem, if you do not have enough free room to place the cam.
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