Shout is a text helpline service supported by the Royal Foundation of the Duke and Duchess of Cambridge.
In addition, Crisis Text Line and the Australian charity Lifeline each benefit from a five-digit donation from Apple.
Prior to recording his own audio for the series, William had previously listened to Time To Walk and is said to have been impressed by the goals of the initiative.
Jay Blahnik, Apple’s vice president of Fitness Technologies, said at the launch of Time To Walk in January, “Walking is the most popular physical activity in the world and one of the healthiest things we can do for our bodies.
“A walk can often be more than just sport – it can help clear your head, solve a problem or welcome a new perspective.”