Same architecture · zero compromise

Native iPhone & Android,
from one codebase.

The same emergency-alert flow you just used on the web — composer, roster, templates, send — running as a real native app on iOS and Android. One Flutter project, two App Store / Play Store binaries, zero JavaScript bridges. Built and working today.

The Trumbull HS Alert app running on Android emulator and iPhone 17 simulator side by side, with the 2-Hour Delay template selected

Android emulator (left) · iPhone 17 simulator (right) · same Dart source

Why Flutter

One codebase. Two platforms. No compromise.

A single Dart codebase compiles to two native binaries — a real .ipa for iOS and a real .apk for Android. No web wrapper, no bridge to native. The widgets you see are drawn by Flutter's own GPU-backed rendering pipeline, so a scroll on iPhone is as buttery as a scroll on a Pixel.

Platform-appropriate native widgets where it matters — Material 3 on Android, Cupertino on iOS. Notice the primary buttons in the screenshots: navy on Android, mahogany on iOS. Same code, platform-correct chrome.

The load-bearing logic is shared with the web demo — the GSM-7 vs UCS-2 segment counter, the idempotency UUID lifecycle, the "[Westside HS]" prefix, the per-recipient consent model — same architecture, same invariants, ported to Dart. If the spec is the truth, the truth runs in three places now.

Feature parity

Every screen, both platforms.

Each shot is a single screen captured from both simulators at the same time. Side by side so you can see the parity in real time.

Compose screen with template chips on Android emulator and iPhone simulator side by side — ComposeSame six-template chooser as the web. Android emulator on the left, iPhone 17 on the right.

Compose screen with the 2-Hour Delay template selected and message body filled in — Template + body filledTap a template, the body fills in. Live segment counter shows GSM-7 vs UCS-2 just like the web composer.

Roster screen showing a searchable list of staff with names, roles, and phone numbers — RosterSearchable staff list with names, roles, E.164 phone numbers. Bottom-tab navigation matches the web's primary actions.

Edit staff form with name, email, phone, role, and an SMS opt-out toggle — Edit staffSame fields, same consent model — including the SMS opt-out toggle that's TCPA-mandatory.

Under the hood

Framework: Flutter 3.x
Language: Dart
iOS target: 16+
Android target: 7.0+ (API 24)
State: Provider / Riverpod
UI: Material 3 + Cupertino
Build output: One .ipa, one .apk
Shared logic: Segments, UUID, prefix, consent

Back to the alert system

Native iPhone & Android,from one codebase.

One codebase. Two platforms. No compromise.

Every screen, both platforms.

Native iPhone & Android,
from one codebase.