1. Demographics of Mobile Device Ownership and Adoption in the United States [Internet]. Pew Research Center: Internet, Science & Tech. Pew Research Center; 2021 [cited 2021May23]. Available from: https://www.pewresearch.org/internet/fact-sheet/mobile/
2. Topic: Mobile app usage [Internet]. Statista.com. [cited 2021 May 23]. Available from: https://www.statista.com/topics/1002/mobile-app-usage/
3. Mobile app industry statistics (2021): downloads, usage, and other facts you should know [internet]. Lvivitycom 2021 [cited 2021 May 23]. Available from: https://lvivity.com/mobile-app-industry-statistics-2021
4. Lagan S, Sandler L, Torous J. Evaluating evaluation frameworks: a scoping review of frameworks for assessing health apps. BMJ Open. 2021;11(3):e047001.
5. Clay RA. Mental health apps are gaining traction. Am Psychol Assoc. 2021;52(1):55.