* Main side business: https://kvdb.io built in Go. In-progress work includes replacing the Lua scripting engine with a JavaScript engine. I think the app server paradigm of the 2000s will be back with a vengeance. Running for 4+ years and I intend to keep it running forever. - Source: Hacker News / almost 3 years ago

I’ve been running https://kvdb.io as a side project for a while. This weekend, I woke up to a bunch of alerts that the server had run out of open file descriptors (rookie mistake, I never expected to receive more than a thousand simultaneous requests). It turns out someone wrote a tutorial on how to automate COVID-19 appointment slot bookings and used KVdb to store SMS OTP codes. Never expected it, but a great... - Source: Hacker News / about 4 years ago

If you have a decently modern phone you can get the smoothtrack app on your phone for $10. You can use that as an input for opentrack. I've been using that for a while, and it seems to be working well. Apparently you can also use a regular webcam in opentrack using aitrack, but I haven't personally used it so I can't vouch for how well it works. Source: almost 2 years ago

For the last 6 months, I’ve been using a app on my phone for head tracking. It’s called https://smoothtrack.app/ and it’s only $9.99USD links to any front facing camera and works very well. I originally bought it because the trackIR pro was on backorder but since using it, I feel no need to change. I have no affiliation with this app.I’m just very impressed by how simple and effective it is. Source: about 2 years ago

Yeah, it works with opentrack. Pretty seamless. You do have to download some connection software to get them to talk, but that’s all covered on the SmoothTrack site. Source: about 2 years ago

Smoothtrack costs $9.99 and only needs a smartphone. Surprisingly reliable and consistent if set up properly. Source: over 2 years ago

The app's webpage, scroll down to the setup section for the usage guide. Source: over 2 years ago