Ever feel exhausted by the endless back-and-forth of "When should we meet?" and "How much does everyone owe?" when organizing events with friends or family? I've been there too, and found that existing tools were either too feature-heavy or required tedious account setup. That's why I built Nowa - an event management app focused on just the essentials that works by simply sharing a URL, no registration required. Key Features No-signup invitations - Just share a URL or QR code and anyone can join instantly. I prioritized simplicity so even grandparents can use it without confusion. Intuitive scheduling - Propose multiple date options at once, participants vote with simple checkmarks, and the best date becomes clear immediately. Automatic bill splitting - Someone covers the bill, enters the amount, and everyone's share is calculated automatically. No more "who owes what?" headaches. Mobile-first design - Built with Flutter for iOS/Android. Smooth operation even when you're coordinating on the train. Technical Details Built with Flutter and Firebase for real-time sync. The biggest challenge was ensuring smooth performance during simultaneous editing by multiple users - I had to redesign the data structure and Firebase security rules several times. The app maintains a 1MB size limit for efficiency, but easily handles ~200 participants in typical usage. Pricing Core features are completely free (up to 3 events, 50 participants each). Premium plan ($3.99/month) offers unlimited usage and ad-free experience. I prioritized "try first" - the free tier is genuinely useful for real-world scenarios. When I tested this with my friend group, someone said "this makes our previous LINE coordination look like chaos." If you've faced similar coordination pain points, I'd love for you to try it out! Feedback and "I wish it had..." suggestions are very welcome. Links:

Android: https://play.google.com/store/apps/details?id=app.bitflap.no... iOS: https://apps.apple.com/us/app/nowa-smart-event-planner/id674... Website: https://nowa.one/en/features/