I won’t cross time zones without it!
I traveled from the east coast of the US to Japan with 9 friends. The time difference between the two locations is 12 hours. I followed the Timeshifter plan with about 85% compliance, and I was the only person in our group with no ill effects from jet lag. I was dumbfounded at how well the app guidelines worked. I have recommended this app to numerous friends—it worked beautifully for me, and I have already added my flights to England for my next trip. I do not intend to travel without it. Thank you for creating this fantastic tool!