# App Use Cases

> For the complete documentation index, see [llms.txt](https://www.jetbrains.com/help/youtrack/devportal/llms.txt).

In this section, you can find step-by-step tutorials on how to manage various use cases with the help of YouTrack apps.

* [App Use Case: Simple Timer](app-uc-simple-timer.html)

* [App Use Case: Send an Issue to an External Service](app-uc-send-issue-to-external-service.html)