The advantage of this principle is that it makes you aware of how much time has passed in the real world. And being confronted with reality is often the best way to raise awareness. However, some studies have shown that this type of application or notification does not actually reduce screen time.

For further information, we recommend that you consult :

- Institut national du Sommeil et de la Vigilance website
- The Morphée network website (health network dedicated to the management of chronic sleep disorders)
- The ANSES website (Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail)
- The Santé Publique France website, and its documents on sleep