In 2025, I found 3 popular apps leaking sensitive user data thanks to simple security bugs. In this *very* deep-dive for subscribers, this is how I use network analysis tools (like Burp) to understand how apps and websites work & share your data — and how you can, too!
I explain how to get started with Burp and similar browser tools, we'll explore API basics, how to understand network requests, and how to get started. I'll also include examples for you to follow along.

A beginner's guide to analyzing the network traffic of apps and websites
In 2025, journalist Zack Whittaker found three popular apps were leaking sensitive user data. This is how he uses network analysis tools like Burp Suite to understand how apps and websites work and share your data. This is how you can, too.