> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/boomerang-3-calibration-app-manual/calibration-app/login.md).

# Login

To run the Calibration App, tap the Calibration App icon.

<img src="/files/bh9RMusXZiToLlwpSOBA" alt="" width="74">

This will open the login window.

<figure><img src="/files/nXDuwQjzwcTjIDxV7q5J" alt="" width="273"><figcaption></figcaption></figure>

To run automatic calibration in Boomerang 3, enter Boomerang 3 server address, your Boomerang 3 username and password, and tap “Sign In”.

To start a manual calibration, tap “Manual calibration”.

In both cases the app main window will open.

A "New customer?" message works as a reminder to modify the customer details  if needed. Tap "No" if you do not want to modify the customer details and go to the main window. If you tap "Yes" then the Info form will be opened.&#x20;

The Info form is described in [Info](/boomerang-3-calibration-app-manual/calibration-app/info.md).&#x20;

<figure><img src="/files/1Eb94xuPEtrie8VkpIu2" alt="" width="375"><figcaption></figcaption></figure>

The main window elements are described in the next chapter.

<figure><img src="/files/7fZ6W2YWr7274uLbabfP" alt="" width="375"><figcaption></figcaption></figure>


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