When something crashes in an app, fixing the bug is usually quite straightforward. But apps can also be blighted by bugs that don’t result in crashes, and this is where things start to get interesting. To find and fix these bugs, you will require as much information as possible and probably a combination of tools. Let me explain a process we know as ‘bug forensics’, based on a real bug that has impacted one of Bugfender’s customers.

When you’re building a website that needs to be updated in real-time, your first thought is probably to add WebSockets to your application. However Websockets is a low-level protocol and to use it, you’ll need to add another layer on top to manage the information you want to get. This is where MQTT is handy, as it’s a higher-level protocol that simplifies working with data streams.