ETHGlobal Built at Lisbon 2026

wyd?

Find My Friends meets a social event concierge. Find your friends, discover the best events, and make the plan without giving up your privacy.

View the code How privacy works
wyd Live Map tab showing events around Lisbon's waterfront wyd Events tab with recommendations and friends going wyd concierge chat with suggestions like wyd tonight and where is everyone

The problem

The plan is everywhere and nowhere.

At a big conference the only question that matters is "wyd?" The answer is scattered across group chats, event pages, and five different calendars. And sharing your location usually means sharing it with everyone.

Five tabs, one plan

Everything you need to find the move.

A native SwiftUI app. It knows the event directory, your friends' plans, and your own calendar, and turns them into an answer.

Concierge chat tab
wyd?Just ask"wyd tonight?" "Where is everyone?" The concierge answers from live data, with events you can join in one tap.
Live map tab
MapSee the sceneEvents colored by type, friend counts on every pin, and friends who chose to share where they are.
Events tab with recommendations
EventsFind the moveRecommendations ranked by where your friends are going, plus a real calendar of your plans.
Circles tab with per-friend sharing toggles
CirclesShare on your termsChoose what each circle sees, hide your plans from one friend, and peek at calendars shared with you.
You tab with schedule and connected calendars
YouAll your plansYour schedule, personal events, and Google, Luma, or Apple calendars in one place.

Privacy by default

You decide who sees what.

Sharing isn't all or nothing. Every circle gets its own dials, and the rules are enforced on the server, not just hidden in the UI.

  • 1

    Per-circle sharing

    Free/busy, public events, approximate location, and live location, each on its own toggle.

  • 2

    Per-friend override

    Hide your plans from one person without leaving the circle.

  • 3

    Synced events stay yours

    Events you import from other calendars are never shown to friends. With free/busy only, they see gray "Busy" blocks instead of titles.

  • 4

    Location is opt-in, twice

    Nothing is sent until you turn it on, and iOS only asks for permission at that moment.

Hackathon Team · what you share
🕒 Free / Busy
📅 Public Events
📍 Approximate Location
🛰️ Live Location
A Alice Chen@alice · sees your events
What Alice sees of your evening

Calendar sync

Paste a link. Done.

wyd reads any iCalendar feed, skips anything it has already imported, and keeps everything private to you.

Google CalendarLumaPartifulApple CalendarOutlookMeetupany .ics / webcal://

Under the hood

Native, fast, and small.

About 2,700 lines of Swift with no third-party dependencies.

SwiftUIiOS 17+, five-tab app
MapKitlive event + friend map
EventKit + ICScalendar import with de-duplication
Postgres RPCsranking and privacy filters on the server

so… wyd?

Clone it, open it in Xcode, and hit run. The backend is hosted and the demo crew is already seeded. The app starts in conference mode, replaying ETHGlobal Lisbon from the opening keynote.

git clone https://github.com/mollybeach/wyd.git
open wyd/wydiOS/MyProject.xcodeproj
Star on GitHub Read the setup guide