For your weekend reading pleasure, here are the most popular AppNewser headlines of the week, including our blog’s expansion, office fitness apps and the best iPad stylus.

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1. Free Fitness & Workout Apps for the Office
2. How to Convert EPub Books for use on Kindle
3. iPhone 5 Schematics Leaked
4. Free eBooks of the Week
5. What is an app?
6. How to Promote Your eBook for Free
7. Best iPad Stylus for Writers
8. Not Even Siri Can Stand Chris Brown
9. INFOGRAPHIC: Lulu.com Authors Have Earned $36M
10. Free apps of the week