How effective is eye tracking for testing mobile UX? Are screen recorders good enough? We are in planning phase of a UX strategy for a new project so all inputs & suggestions are welcome.
Several general things to consider for mobile UX:
Eye tracking would be tricky to measure when the screen is so physically small.
I think with a smart phone I'd more interested in the 'clicks' and how people use their fingers to navigate an app. Fingers are so imprecise when compared to mice and this often overlooked by advice on responsive design.
If you are going to film users you might actually be better stepping the camera back a bit so you can actually record the interaction including the hands holding and interacting with the device.
WHen you say "are screen recorders good enough", do you mean is recording the screen sufficient, or should eye tracking be used on top of it? If so, then I would say that screen recording is sufficient, as long as you are clear about what you are looking for from the users. From what I've seen, one of the tricky parts of screen recording is watching gestures, since subtle movements such as taps and swipes can be lost or misinterpreted as non-touch gestures.
Of course, eye tracking isn't going to help you identify gestures ;)