I read about this app in food and travel magazine and was keen to try it on my long trip from London to Melbourne and back. I followed the guidance to the letter (much to the dismay of my seat mate on the way back!) and did not suffer jet-lag at all. It felt like a brilliant secret to be sitting there with my light on during the inbound journey when everyone else had gone to sleep. The airline lights are managed to prepare you for the immediate journey but don’t take into account any connections you may make pre or post that leg. Timeshifter factors that in as well as your normal sleeping and waking hours, to keep you on your normal sleep pattern. I was very impressed and would definitely use again.