When starting my freelance career back in 2012 I had a pretty simple idea on how to track time using only google calendar and this tiny web app I wrote. Used it literally every workday since then, and even got a colleague (another freelancer) to use it with the quote “the first time tracker to ever work for me, and I’ve tried a lot!”. He is still using it last time I checked.

So I guess it is actually used by one more person than me!