Want to know who showed up? This app + Youhere.org are an app-based attendance service, where people check-in with their phones. Do paperless and accurate attendance of any sized group in seconds. Your participants: Uses this app to 'check in' to your event. Try it with your group for free and see how it works. You'll see how accountability can be added to any gathering, and that attendance can become part of your regular plan. Youhere easily handles awkward locations and groups of all size