The 39-year-old royal is currently living in Anmer Hall, her Norfolk home with Prince William, 38. She and her family are living here instead of their Kensington Palace home during the coronavirus.

“All my children’s sleep tips are on the app.”

Hobbies are important, whatever they are, she said.

“Life is not all about school, it’s about family and relationships and enjoying your hobbies,” Louenna said.

“With all this extra time at home, we now have time to practice the hobbies that usually get sidelined – it could be that your child has a passion for baking, or playing football, or sewing, or painting.

“And these hobbies could turn into a lifelong passion so try and spend some time helping them improve their skills.”

Now all her know-how will be available to parents all over the world.

The Nanny Louenna app contains expertise from Louenna herself, as well as experts including pediatric first aid from Jenni Dunman of Daisy First Aid, pre- and post-natal fitness advice from top London trainer Lily Gredley, and speech and language expert Hannah Scully.

Parents can enjoy expertise on essentials from feeding, bathing and changing, to sleep routines, potty training and language development.

The app also contains over 100 activity ideas to do with babies and children that are both enjoyable and educational.