Timeshifter

Timeshifter is an app that helps you beat jet lag. There are highly caffeinated sections, living in the dark or needing bright lights and staying up late nights. It starts a few days before departure and finishes a day after arrival. Getting onto a flight and not heading straight to the movies, while having a nap straight away at 3 in the afternoon is tough.

But I slept ok on the shorter 7 hour flight and the longer 13 hour marathon. 

It's almost 4pm and I'm on a train about to leave from Paris to Bordeaux. I feel really good. Give it a try people, but beware, you only get one free use of the app.