Assessment of top femtech apps for data gathering policies worldwide in 2021

The source mentions the following: The study reviewed the 23 most popular women’s mHealth apps on the market by focusing on publicly available apps on the App Store and Google Play.
To be included in the study the apps had to match the following criteria:
Be available in English language; The app had to be functional in the search period (January to March 2021); and the the app must provide a service related to women's health.
mHealth apps enable the widespread collection of a wealth of health-related information. Assuming that data privacy and data protection are fundamental human rights, including the right to understand and control which personal data are collected, who collects them, and how and by whom they are used, it is imperative to understand what privacy rights are recognized in practice and how they are enforced.