A new free iPhone app called Entrain reportedly provides travelers with a solution to jetlag. The said app was designed by mathematicians from the University of Michigan, according to VentureBeat.

The makers of Entrain claim that the app helps prevent jetlag by teaching users ways to gradually synchronize their body clocks with different hours. This prevents travelers from feeling intense sleepiness when crossing time zones, the report stated.

The University of Michigan explained how Entrain is used: "Start by entering your typical hours of light and darkness in your current time zone, then choose the time zone you're traveling to and when, as well as the brightest light you expect to spend the most time in during your trip (indoor or outdoor.) The app offers a specialized plan and predicts how long it will take you to adjust."

The builders of Entrain used the principles discovered by Yale University post-graduate students. The app is very easy to use. Users are simply instructed on how to adjust the light settings in their environment to sync with the light in their destination, VentureBeat reported.