Certain Check-In is a simple, lightweight app to check attendees in to your events running on the Certain Platform. With our all-new application, you can: - Check in attendees for events configured in Certain. - Edit profile fields for attendees. - Instantly sync information back to Certain. - Add walk-in registrations on the go. - Scan QR codes created in Certain Badges. If the app has made your life easier, please consider leaving a review of our app.