I have written a chapter in a new anthology edited by Irina Kaldrack and Martina Leeker. There is no software, there are just services (Lüneburg: Meson Press, 2015).
My chapter is on mobile apps, and is titled «The cloud, the store, and the millions of apps». It is open access publication, so anyone can download and read for free.
Flashlight is number 16 on the list of top 25 free apps of all time. It allows you to use the iPhone as a flashlight in two ways: Either by turning on the LED light used by the camera for flash, or by filling the screen with a solid color, so you can use the screen itself as a light source. Les videre
The Facebook app is, of course, the mobile version of the world’s largest social network site, and one of the more complex apps in this study. Both Facebook and its iOS app has changed many times. Here, I am analyzing version 5.0. Les videre