Meridian

Meridian is a native iOS and watchOS timezone management app. Any timezone question should be answerable within one glance or one tap, without mental arithmetic. It should feel like a precision instrument, not a utility.

Signature capabilities

• Zone Stack — live, solar-phase-coloured card stack of saved timezones. Time at 56pt is the dominant element; all supporting information recedes.
• Timeline Scrubber — drag ±24 hours to see all zones update simultaneously. Physically weighted with haptic notches.
• Overlap Finder — identifies working-hours windows across all zones with per-zone custom hours and ranked best-slot suggestions.
• Trip Mode — manually activated travel context that reorders the zone stack and drives Live Activities.
• Quick Convert — Spotlight-style natural language time conversion.
• Widget suite — Lock Screen, Home Screen, StandBy, and Watch complications.
• Live Activity — in-flight tracker showing departure and destination times with elapsed-time progress bar.

Technical details

• iOS 18+ and watchOS 11+
• SwiftUI + SwiftData + CloudKit + WidgetKit + ActivityKit
• Fully on-device — no server-side backend
• Solar phase calculations drive the visual design system