So you and your group meet once a week, eg. five-a-side football, band or choir rehearsal, book club etc. But only if enough people attend that is. As the event approaches, your WhatsApp group is flooded with "I'm going", "Not this week.", and - crucially - "So, are we enough, yet?!" messages. Every week the same ruckus.

Not any longer, thanks to ThrSqr!

Click here to see it in action and to actually use it like my football team and I have been doing for weeks now.

1. Set up your event,
2. share the link,
3. be there or be square,
4. read responses, or
5. get notified.

• URL based, no login required; session saves user's name / language for next visit
• Auto-resets responses one hour after the event has begun
• Dynamically generated webmanifest for each event
• Browser push notifications for individual events
  • Works with Chrome, Edge and Firefox on Android, Windows and Linux.
• Individual event logos
  • which are also used for web manifest and notifications and home scree logos.
• Time zone handling:
  • Saves browser timezone on event creation as event timezone.
  • Displays event time, day of the week and date of next event according to browser timezone.
• English and German versions
• User-authentication protected master admin page to clean up events and users

• Node.js
• Express.js (view engine: Pug)
• PostgreSQL
• Web APIs:
  • Service Workers, Push, Notifications
• Heroku
• AWS S3 + Lambda