IZ
“Connecting people through shared interests.”
Binder is an iOS app that brings together people with shared passions — from photography to fitness to startup culture. Users create interest profiles, discover matches, and connect in a curated feed.
Building a recommendation algorithm that felt natural and organic — without the "swiping fatigue" of existing apps — while keeping the app fast and battery-efficient.
We built a tag-based interest graph with weighted matching scores. The feed renders asynchronously with prefetching so content loads instantly. Notifications are interest-triggered, not time-triggered.
Multi-tag weighted algorithm matching users by depth and breadth of shared interests.
Infinite scroll feed showing potential connections — SwiftUI with async image loading.
Firebase-powered real-time messaging with read receipts and media sharing.
Context-aware push notifications triggered by interest events, not arbitrary timers.
4.8 App Store rating on launch
10,000 downloads in first 30 days
68% Day-7 retention rate
Featured in App Store "New Apps We Love"
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