While the challenge is focused on 10% Happier, employees can also use any mindfulness app that ties into Apple's Health app on iOS. One of the areas that Health measures is mindfulness, showing you how many "Mindful Minutes" you've accumulated over the past day, week, month, and year. This information can be filled by mindfulness apps like Headspace, Aura, Calm, 10% Happier, and Apple's own Breathe app for Apple Watch.
Employees who complete the challenge will be awarded with a T-shirt that displays the Breathe app's blue and green logo. Apple has held similar internal challenges for its employees in the past, although they have mostly focused on physical exercise of some kind.
In April 2017, employees who completed the stand, movement, and exercise rings on the Apple Watch each day for a month received an Activity rings pin in gold, silver, or bronze, based on how many days in the month they achieved 100% ring completion. Another competition like this was held earlier this year, but the prize was an exclusive Apple Watch band.