> ## Documentation Index
> Fetch the complete documentation index at: https://partner-help.letsdothis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Check-in app overview

The check-in app keeps event day running smoothly — a fast, seamless and stress-free experience for you, your team and your participants. It runs on iOS and Android phones/tablets, and works just as well for a 100-person event as it does for one with 60,000 participants and 20 volunteers.

Checking participants in is just the start. From the same app your team can:

* Assign bibs at the desk
* Hand out add-ons like t-shirts and medals
* Get last-minute waivers signed
* Control access to different zones
* Give medical staff one system to capture the details of participants they treat

## How a check-in works

On the day, a check-in is quick:

1. **Find the participant** — scan the QR code on their booking, or search by name or bib number.
2. **Step through your check-in steps** — signing a waiver, assigning or confirming a bib, handing over add-ons. You choose which of these appear.
3. **Check them in** — they're marked in, and everyone on your team sees it instantly.

Everything your team does in the app is organised into **roles** — one for each kind of job on the day.

## The roles your team can use

| Role                   | What it's for                                                                                                                               |
| ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
| **Check-in**           | Your staff and volunteers checking participants in and checking their bibs. This is the main role most events use.                          |
| **Add-on fulfillment** | Volunteers handing out t-shirts, medals and other add-ons. Use this when collection happens somewhere separate from the main check-in desk. |
| **Zone management**    | Staff on the gate of a zone — a festival village, an after-party, a bag drop, or any area where you want to control entry.                  |
| **Medical**            | Your medical team, who need quick access to emergency contacts, date of birth and other medical details.                                    |
| **Solutions**          | Your solutions desk — the experienced staff who handle anything the other roles can't. Sees every participant and can override the rest.    |

## Ready to set it up?

<Card title="Set up the check-in app" icon="arrow-right" href="/docs/event-day/setting-up-the-check-in-app">
  Get everything ready before event day — check-in dates, your staff, and the
  app on your devices. Roles, passcodes and the rest are optional.
</Card>

## Related guides

* **[Bib assignment](/docs/event-day/bib-assignment)** — assigning bibs in advance or at the desk, and the settings each needs.
* **[FAQs](/docs/event-day/faqs)** — answers to what comes up while you're setting the app up.