TellMeFirst

Create an event page and share its link. People follow by saving a pass in Apple or Google Wallet, then receive relevant updates when you publish them. Subscribers need no TellMeFirst account or separate app.

Wallet updates are free. An optional event upgrade adds email subscriptions, custom branding and website embeds. Use it for launches, openings or changes to an event. Supports up to three updates in any rolling 24 hours. Notification arrival depends on device settings.