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WhiteCrow

Rare by nature. Smart by design.

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WhiteCrow
Marketing Agency
Cross-Platform & Native Mobile Engineering

Native power.
Cross-platform speed.

We engineer high-performance mobile applications utilizing React Native, Flutter, and native Swift/Kotlin. Tailored for scalable growth in the US and European markets.

Build Your AppExplore Cases
React Native
Cross-Platform
TypeScript & React

React Native

Single codebase, native-like performance for iOS & Android.

Flutter Engineering
Cross-Platform
Dart & Skia

Flutter Engineering

Pixel-perfect UI rendering with Google's UI toolkit.

Native iOS
Apple Ecosystem
Swift & SwiftUI

Native iOS

Maximum hardware integration and flawless Apple design.

Native Android
Google Ecosystem
Kotlin & Jetpack

Native Android

Deep OS access and memory optimization for Android devices.

Mobile UI/UX
Product Design
Figma & Prototyping

Mobile UI/UX

User-centric interfaces engineered for high retention.

Cloud & Backend
Infrastructure
Node.js & Firebase

Cloud & Backend

Scalable databases and real-time WebSocket communication.

15+

Apps Launched

4.9★

App Store Standards

100k+

Active Users

100%

Store Approval Rate

Development Paradigms

Choose your technical path.

Speed & Efficiency

Cross-Platform Mobile Engineering

Ideal for startups and scaling businesses looking to launch iOS and Android apps simultaneously with an optimized budget. We build production-ready apps using React Native and Flutter.

  • Single Codebase for iOS & Android
  • Near-Native 60FPS UI Performance
  • Faster Time-to-Market
  • Lower Maintenance Costs

Proven Portfolio

Featured mobile builds.

Geosocial Application Weeave
Cross-Platform (Flutter & Firebase)Client: Michael Levitan (Tel Aviv, Israel)

Geosocial Application Weeave

We worked on optimizing and technically improving a mobile app for real-time networking. Connected users physically present in the same location (venue, coworking, gym).

🛠️ Key Solutions Implemented:

  • • Geofencing optimization: Configured precise geolocation while minimizing battery drain.
  • • UI/UX Refactoring: Refined internal logic to quickly display users 'here and now.'
  • • Status & Loyalty Modules: Implemented temporary meeting statuses and partner promo codes.
FlutterDartFirebaseCoreLocation SDK
View in App Store
Goldstadtaktuell News Platform
Cross-Platform (React Native & Node.js)Client: Igor Myroshnichenko (Germany)

Goldstadtaktuell News Platform

Built a mobile app for German media from scratch. Created a convenient urban media platform with real-time news publishing directly from the smartphone.

🛠️ Key Solutions Implemented:

  • • Live News Feed: Fast urban events viewing with adaptive image & video optimization.
  • • Reporter Cabinet: Special tool allowing journalists to draft and publish reports on-the-go.
  • • Push Notifications: Instant breaking news delivery & offline caching.
React NativeTypeScriptNode.jsMongoDB
View in App Store
Zip Archiver & File Compressor
Native iOS (Swift)Client: KISOLID Solutions Internal Product

Zip Archiver & File Compressor

A universal, lightning-fast tool for archive extraction, data compression, and file management on iPhone and iPad built natively using Swift.

🛠️ Key Solutions Implemented:

  • • Native Swift architecture ensuring flawless integration with Apple ecosystem.
  • • Blazing-fast file processing with optimized memory management.
  • • Sleek UI/UX matching the highest iOS design standards.
SwiftiOS NativeCoreDataFileKit
View in App Store

Frequently Asked Questions

Everything you need to know about building a mobile app with us.

The cost depends on the complexity of the app, backend requirements, and the development approach (Native vs. Cross-Platform). A streamlined MVP using React Native or Flutter usually starts lower than building two separate native apps. We conduct a free technical audit to provide a precise, transparent estimate before writing any code.

If you want to launch on both iOS and Android simultaneously while optimizing budget and time, Cross-Platform is the best choice (and handles 90% of modern app needs flawlessly). If your app requires heavy graphic processing, deep hardware integration (like Bluetooth IoT), or ultra-complex system file management, Native development is required.

A standard cross-platform application (iOS + Android) typically takes 3 to 5 months from UI/UX design to App Store approval. Highly complex enterprise systems or apps requiring complex backend infrastructure can take 6+ months. We break the project into clear sprint milestones.

Yes. Getting approved by Apple and Google can be strict and frustrating. We handle the entire deployment process, ensuring all guidelines, privacy policies, and technical requirements are perfectly met for a smooth launch.

Absolutely. Operating systems (iOS/Android) update constantly, and your app needs to keep up. We offer SLA (Service Level Agreement) packages to provide ongoing monitoring, bug fixes, server maintenance, and feature expansions.

Have a mobile app idea?

Let's discuss your architecture, timeline, and scope with our lead mobile engineers. Free technical audit & estimate within 24 hours.

Initiate Mobile Project