> For the complete documentation index, see [llms.txt](https://eventx-hq.gitbook.io/knowledge-base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eventx-hq.gitbook.io/knowledge-base/check-in/check-in-app.md).

# Check-in App

The EventX Check-in App is the on-site tool for scanning attendee QR codes, managing walk-ins, printing badges, and tracking attendance. Available on iOS and Android.

## App Setup & Configuration

* [**How to Change the API Host in the Check-in App**](/knowledge-base/check-in/check-in-app/how-to-change-the-api-host-in-the-check-in-app.md) — Connect to a custom API host for Private Cloud deployments. Requires app 6.2.1+.
* [**How to Configure Default Area Code for the Check-in App**](/knowledge-base/check-in/check-in-app/how-to-configure-default-area-code-for-the-check-in-app.md) — Set a default calling area code for walk-in registrations. Requires app 6.2.1+.
* [**How to Configure Profile Fields for the Check-in App**](/knowledge-base/check-in/check-in-app/how-to-configure-profile-fields-for-the-check-in-app.md) — Choose which attendee fields appear in the app and set them as required. Requires app 6.2.0+.
* [**How to Sort the Attendee Order on the Check-in App**](/knowledge-base/check-in/check-in-app/how-to-sort-the-attendee-order-on-eventx-check-in-app.md) — Change sorting method (e.g., by latest check-in time) to keep recently arrived attendees at the top.
* [**How to Display Custom Lines on the Check-in App**](/knowledge-base/check-in/check-in-app/display-custom-lines-on-check-in-app.md) — Show custom field data below attendee names on the app attendee list.

## Reference

* [**Check-in App Error Messages**](/knowledge-base/check-in/check-in-app/check-in-app-error-messages.md) — All error scenarios and pop-up messages when scanning QR codes.
* [**Check-in App UX Enhancement**](/knowledge-base/check-in/check-in-app/check-in-app-ux-enhancement.md) — Data sync progress indicator and real-time printer connection status.

## Common Questions

* **What devices are supported?** — iPad mini 5th gen+, iPad Air 3rd gen+, iPad 7th gen+, iPad Pro, iPhone 12+. See [onsite check-in requirements](/knowledge-base/check-in/check-in-setup/onsite-check-in.md#setup-requirements).
* **The app says my attendee isn't found — what's wrong?** — Check the filter ("All Attendees" vs "Attended" vs "Not Attended"). See [UX Enhancement](/knowledge-base/check-in/check-in-app/check-in-app-ux-enhancement.md) for the filter suggestion feature.
* **Can I customize which fields show in the app?** — Yes. See [Configure Profile Fields](/knowledge-base/check-in/check-in-app/how-to-configure-profile-fields-for-the-check-in-app.md).