You can rely on your smartphone for directions and fun games, but you may not want to depend on an app to plan or avoid a pregnancy.

Researchers at Georgetown University reviewed nearly 100 fertility apps for accuracy.

They found the majority were not based on solid science, and many warned against using them to avoid pregnancy.

30 of the apps were reliable for predicting a woman’s time of ovulation, but only six accurately provided a window of fertile days.

Experts recommend women receive instruction on how to track fertility, and then use an app with a high accuracy score.

The highest rated apps according to this researcher are Ovulation Mentor,, iCycleBeads, Lilypro and Lady Cycle and

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