Twitter now tracks more than just your tweets, followers and direct messages. The site is now monitoring every app that you install or have installed to your smartphone.
Here's what the company has to say about its newest tracking method:
To help build a more personal Twitter experience for you, we are collecting and occasionally updating the list of apps installed on your mobile device so we can deliver tailored content that you might be interested in.
The feature is activated by default when you update to the latest version. Luckily, it's possible to disable this freaky tracking method.