Flutter 3.47 made the Widget Previewer stable, and the first thing most teams will do is point it at a screen that boots the app. That one renders an error, not a component.

⚠️ 𝐖𝐡𝐲 𝐢𝐭 𝐟𝐚𝐢𝐥𝐬: the previewer runs browser-backed. Native plugins, dart:io and dart:ffi are unsupported, and changing global state needs a full restart.

I've stopped reading those errors as tooling gaps. A widget that reads an injected value previews fine, because you can put a hand-written fake above it. One that builds its own dependency cannot.

🔍 𝐓𝐡𝐫𝐞𝐞 𝐜𝐡𝐞𝐜𝐤𝐬 before you annotate anything

Does it initialize a service on the way to the first frame? Move that to the composition root.

Does the constructor require arguments? Annotate a top-level factory function instead.

Does it have an intrinsic size? If not it auto-constrains to about half the preview frame, so pass size.

✅ 𝐒𝐭𝐢𝐥𝐥 𝐧𝐨𝐭 𝐚 𝐭𝐞𝐬𝐭. A preview asserts nothing and never runs in CI. Keep the golden test for the dependency bump that shifts your card padding at 03:00.

Six failure modes, and the conventions that survive a design system. https://www.duskolicanin.com/blog/flutter-widget-previews-3-47-guide

Activity: City-Based Activity Discovery & Booking Platform

Activity is a Kuwait-based mobile platform built to make discovering and booking local experiences simpler. Instead of searching separately for movies, parties, events, games, workshops, kids’ activities, fitness sessions, food experiences, and other things to do, users can discover activities around them, choose a time slot, complete the booking, and manage everything from one app.

The platform connects users with local vendors who organize activities around the city, turning activity discovery into a complete journey from finding something interesting to showing up for the experience.

The problem

Finding something to do often means checking multiple platforms, social pages, event listings, and individual booking services.

The challenge was to create a single experience where users could discover different types of activities based on their location and interests, understand the available options, select a suitable time, make a payment, and keep track of their bookings without switching between different services.

Activity brings those steps together by combining location-based discovery, search, filtering, time-slot booking, payments, favorites, and booking management in one mobile experience.

My role

Flutter development for iOS and Android

UI/UX implementation for activity discovery and booking

Location-based activity discovery and map integration

Search, filtering, favorites, and activity browsing

Booking and time-slot selection flows

Payment and booking confirmation integration

QR-based booking and attendance experience

Quality assurance and release testing.

Key features

Location-based activity discovery

Activity is built around discovering things to do nearby. Users can browse activities based on their location and use the interactive map to visualize available experiences around them. Activities can be filtered by location, type, and time slot. Activity discovery and categorization

The app brings different types of experiences into one place, including movie screenings, parties, social events, indoor and outdoor games, kids’ activities, workshops, fitness, yoga, wellness, art, cooking, food experiences, and more. Search and advanced filters

With a large and varied activity catalogue, simply displaying activities in a list would make discovery harder. Activity details and time-slot booking

Once users find an activity, they can open its details, review the available information, select a preferred date, choose a suitable time slot, and book their spot.

The supplied booking flow shows this progression directly: activity details → date selection → time selection → Book Now.

Technical approach

Mobile: Flutter, Dart Platforms: iOS and Android Core modules: Location services, map-based discovery, search and filters, activity catalogue, favourites, booking management, time-slot selection, payments, QR-based booking confirmation Integrations: Maps/location services, payment gateways, backend APIs Product areas: User discovery, activity/vendor listings, scheduling, booking, payment, and attendance

The application was designed as a complete mobile booking experience rather than simply an activity catalogue, with the major product flows connected from discovery through attendance.

Engineering and product decisions

The biggest product challenge was balancing a large variety of activities with a simple discovery experience.

A user looking for a specific activity should be able to search and filter directly, while someone who simply wants to find something interesting should be able to browse suggested, featured, and recently viewed activities.

The booking flow was therefore kept closely connected to the activity itself: users move from the activity card to its details, select a date and available time, complete payment, and then access the reservation through My Bookings. The project's clearest product distinction is this end-to-end flow: discover something to do → choose when to go → book the spot → manage the reservation → show up with the booking confirmation.

Outcome

Activity shipped as a mobile activity discovery and booking application for the Kuwait market, connecting users with local vendors and experiences across entertainment, activities, workshops, wellness, food, and other categories. The Android application is publicly available on Google Play and was updated on April 5, 2026.

The result is a single mobile experience that brings together local discovery, map exploration, search, scheduling, payments, favourites, booking management, and QR-based attendance.

The product idea is simple:

Find an activity. Book your spot. Just show up.

Nice work bringing discovery, time-slot booking, payments, and QR attendance into one flow. The highest-risk checks here are timezone or slot conflicts, payment success versus delayed confirmation, and QR redemption after reconnect. I run focused release QA and can turn around a...