> 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/installation.md).

# Installation

To install the Cal App:

1. On the tablet open Settings - Security and privacy and disable Auto Blocker which does not allow to install apps from unauthorised sources.

It may look different depending on the tablet producer.

<figure><img src="/files/uOOXFFUsIyGG12WfpItL" alt="" width="375"><figcaption></figcaption></figure>

2. Download the current version of the Cal App apk file from <https://icuscandinavia060.sharepoint.com/:f:/s/Technicalfile/ElH_TrzuOuFBhsf8YbNDmWsBjHxG3Sr8oUqGSvvIQ5dPtg?e=reBJP0> to the tablet.
3. Tap the apk file.

<figure><img src="/files/Ovhezlslm802NOurPbTD" alt="" width="375"><figcaption></figcaption></figure>

4. Tap "Install".
5. Cal  App is not Google Play app so it will show the message about the unsafe app being blocked.

<figure><img src="/files/NvCuV55SvDApWMZ8QjQr" alt="" width="375"><figcaption></figcaption></figure>

6. Click "More details" and then "Install anyway".

<figure><img src="/files/dxr4uXuzcDkFu3fYfo1L" alt="" width="375"><figcaption></figcaption></figure>

7. Wait for the installation to finish.

<figure><img src="/files/BnZhEtZBn91QNKuzspu7" alt="" width="219"><figcaption></figcaption></figure>

<figure><img src="/files/OihEw4gx91sASX6oIsHR" alt="" width="217"><figcaption></figcaption></figure>


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