We have a lot of short Europe to US and back trips this year and I normally struggle with jet lag. So on a recent trip, I downloaded Timeshifter in an act of desperation in the middle of the night. I used on the return flight and on a return trip this weekend. It worked really well even though I only follow the advice like 60-80% of the time. I rated my jet lag mild-insignificant. The layout is also super clean and pretty, which makes it easy to follow the advice.