More concrete examples of internal iOS apps at big companies like Facebook and Google are mentioned in this NYT article https://www.nytimes.com/2019/01/31/techn

More concrete examples of internal iOS apps at big companies like Facebook and Google are mentioned in this NYT article https://www.nytimes.com/2019/01/31/technology/apple-blocks-facebook.html https://www.nytimes.com/2019/01/31/technology/apple-blocks-f... This was when Facebook had it internal iOS apps disabled due to Apple’s discovery of the true nature of Onavo as a privacy eroding app distributed to consumers by Facebook.