Cross-platform flutter e-commerce app development

Case Studies

High-performance mobile application for Ultrashop that ensured fast time-to-market, secure payments, and intuitive UI across iOS and Android using Flutter.

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E-commerce

Industry

Ukraine

Location

Software & Product Development, IT Team Extension for AI Projects, Mobile App Development

Services

$35,000 – $50,000

Budget

I was impressed by their reliable delivery and high quality of work.

Dariya Yepikhina

Head of E-Commerce, ULTRA MODA LLC.

Challenge

Ultrashop needed a modern mobile app that would integrate seamlessly with its existing systems while delivering a fast, responsive shopping experience.

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Outcomes We Deliver

Solution

We developed a cross-platform mobile app using Flutter, enabling a single codebase for iOS and Android.

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Tech Stack

To develop a cross-platform mobile app, Blackthorn AI applied a production-grade tech stack including:

Dart

LiqPay

Google Pay

Apple Pay

Dart

LiqPay

Google Pay

Apple Pay

Roadmap

Project duration

01-02 Weeks

Project Initialization & UI Integration

Set up the architecture, configured the repository, and integrated Flutter components based on the Figma design system.

03-05 Weeks

Core Feature Development

Built the main user flows including homepage, catalog, product details, cart, and checkout functionality.

06-07 Weeks

Advanced Module Implementation

Implemented complex modules like user accounts, favorites, notification logic, and layered filtering.

08-09 Weeks

API & Payment System Integration

Integrated LiqPay, Apple Pay, and Google Pay; synced product data and inventory through 1C and Bitrix.

10 Weeks

Final QA Release Candidate & Deployment Prep

Performed testing, delivered release-ready builds, collected client feedback, and prepared the app for store launch.

01-02 Weeks

Project Initialization & UI Integration

Set up the architecture, configured the repository, and integrated Flutter components based on the Figma design system.

03-05 Weeks

Core Feature Development

Built the main user flows including homepage, catalog, product details, cart, and checkout functionality.

06-07 Weeks

Advanced Module Implementation

Implemented complex modules like user accounts, favorites, notification logic, and layered filtering.

08-09 Weeks

API & Payment System Integration

Integrated LiqPay, Apple Pay, and Google Pay; synced product data and inventory through 1C and Bitrix.

10 Weeks

Final QA Release Candidate & Deployment Prep

Performed testing, delivered release-ready builds, collected client feedback, and prepared the app for store launch.

Team Size

1 x Project Manager

1 x Flutter Developer

1 x QA Engineer

1 x UI Integration Engineer

4 team members from Blackthorn.ai

1 x Project Manager

1 x Flutter Developer

1 x QA Engineer

1 x UI Integration Engineer

Delivering Impact

Beyond the values already highlighted, there’s even more to discover. Our commitment to innovation, client success, and impactful results sets us apart

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100%

Coverage

Of core e-commerce functionality in one mobile platform

3

Payment options

Integrated in 1 unified secure flow

<1.5s

Screen response time

Across devices

~50%

Faster time to market

Thanks to unified codebase and streamlined QA.

2x

Lower maintenance effort

With shared code updates and consistent UI across platforms.