I've had good experiences with SmoothTrack on Android. It's not free $10 but works well. There are a few free options if you use Android as well, I've done writeups for SmoothTrack as well as a couple others over on my blog. DIY Game Controllers. They should all be under the "Flight Sim" category.
Here's a couple links. A no cost option called GimbalTrack. Haven't spent enough time with this one to have a strong opinion on it. Here is SmoothTrack the only one I've spent any real time with. It works well but is fairly fiddly to get working. Both just use your smartphone camera so no headgear or anything to mess with. If I recall SmoothTrack required the room to be pretty well lit to work right.
Hope this helps.