Timatic, Traveldoc, doesn't matter, you use the one your employer gives you.

Back in the day I used to use Timatic. But no blue planes to be seen.
Well, dark blue and red yes, in those times but that's an aside.

big difference between the two is that one is ran by an independent company and has customer facing interface, and the other is an IATA product only available to subscribers.
But they ask for the same things and deliver the same info (save for database issues when one is updated already and the other isn't yet)