Should we build a native app or a cross-platform app?

Cross-platform (Flutter or React Native) is the right choice for most products — 90% of code shared, faster development, and one team instead of two. Native Swift or Kotlin development is worth the cost when you need deep platform integration (AR, complex custom animations, demanding hardware access) or when you have a large existing native codebase.

How long does it take to build a mobile app MVP?

A well-scoped mobile MVP with 4–6 screens and a backend API typically takes 8–14 weeks with one senior developer. Timeline depends significantly on design readiness, backend complexity, and how many third-party integrations are required.

How do you handle App Store and Google Play review rejections?

We follow submission guidelines proactively — reading the review guidelines for your specific app category before submitting. If a rejection occurs, we respond to reviewer feedback within 24 hours and have a strong track record of resolving rejections on the first resubmission.

Do you provide the source code and can we maintain it ourselves after delivery?

Yes — full source code, Git history, and documentation are delivered. We run knowledge-transfer sessions and write maintenance guides so your team can confidently own the app. We're also available for retained maintenance if preferred.

Can you add mobile app capabilities to our existing web product?

Yes. We can build a companion mobile app that shares your existing API, implement a progressive web app (PWA) for a lighter-weight mobile experience, or evaluate which approach better serves your users based on your specific requirements.

Mobile

Hire Mobile App Developers

Hire mobile app developers who ship polished iOS and Android apps — from architecture through App Store approval.

Native & Cross-Platform Expertise — We match the technology — Swift, Kotlin, Flutter, or React Native — to your project requirements, not to what we're most comfortable with.

Store Submission Handled — We manage App Store and Google Play submission, review guidelines, privacy disclosure, and staged rollout from first build to live release.

Risk-Free 1-Week Trial — Try the developer for a week. If it's not the right fit, you don't pay.

Get Free Consultation Book a 30-Min Call

80+

mobile apps shipped

6 yrs

average mobile experience

48 hrs

to onboard your team

4.6★

average store rating

What They Build

Key Capabilities of Our Mobile App Developers for Hire

iOS Native Development (Swift/SwiftUI)

Build native iOS apps using Swift and SwiftUI (or UIKit where needed) — leveraging platform-specific APIs like Core Data, HealthKit, ARKit, and Apple Pay.

Android Native Development (Kotlin/Jetpack Compose)

Build native Android apps using Kotlin and Jetpack Compose — leveraging WorkManager, Room, CameraX, and Google Pay for a genuinely native experience.

Cross-Platform App Development

Build and maintain Flutter or React Native apps that share 90%+ of code between iOS and Android while maintaining platform-appropriate UI conventions.

App Architecture & Code Quality

Design clean architectures (MVVM, Clean Architecture, MVI) that separate concerns, enable unit testing, and keep the codebase maintainable as it grows.

Offline-First Data Synchronisation

Build apps that work reliably without connectivity — local database with sync queues, conflict resolution, and background sync when the network returns.

Mobile Security Implementation

Implement biometric authentication, secure keychain/keystore storage, certificate pinning, root/jailbreak detection, and code obfuscation for sensitive applications.

Performance Profiling & Optimisation

Profile apps with Instruments (iOS) or Android Studio Profiler to identify memory leaks, battery drain, and rendering issues that cause negative App Store reviews.

App Store Optimisation & Release Management

Set up CI/CD for automated builds, manage TestFlight/internal testing tracks, write App Store metadata, and manage staged rollouts to minimise release risk.

Engagement Options

Flexible Hiring Models for Mobile App Developers

Full Time

160 hrs/month

1 month minimum

Dedicated full-time mobile developer
Daily async standups
Direct Slack/Teams access
Weekly build & progress reports
CI/CD & store submission included
Code reviews & architecture documentation
Full IP ownership transferred
NDA & security agreement

Get Started

Part Time

80 hrs/month

1 month minimum

Dedicated part-time mobile developer
Twice-weekly check-ins
Async-first communication
Bi-weekly progress reports
Flexible scheduling
Full IP ownership transferred
App architecture documentation
Ideal for ongoing mobile feature work

Get Started

Hourly

Flexible hours

Pay-as-you-go

No minimum commitment
Scale up or down anytime
Ideal for mobile sprints or audits
Hour tracking & reporting
Direct developer communication
Same vetted talent pool
Great for performance or compliance fixes
Pay only for hours delivered

Get Started

Why Bluejay

Why Hire Mobile App Developers From Bluejay Advisory?

Bluejay's mobile app developers span native (Swift, Kotlin), cross-platform (Flutter, React Native), and hybrid approaches. Rather than pushing one framework, we recommend based on your team's existing skills, app complexity, performance requirements, and budget. Every mobile app we deliver is built with accessibility, offline resilience, and App Store compliance in mind — not just feature parity with a web app.

Platform-First Thinking

We design mobile UX following iOS Human Interface Guidelines and Material Design 3 — users recognise apps that feel wrong, even if they can't articulate why.

Technology Recommendation Integrity

We tell you when Flutter or React Native is the right choice and when native development is worth the extra cost — based on your requirements, not on what we're most profitable doing.

Privacy & App Store Compliance

App Tracking Transparency, privacy manifests, data use declarations, and GDPR compliance are handled correctly — avoiding the App Store rejections that delay launches.

Automated Quality Assurance

Unit tests, UI tests, and end-to-end tests run in CI on real devices via Firebase Test Lab or BrowserStack — so regressions are caught before users see them.

User Retention Features

Push notifications, deep links, onboarding flows, and app rating prompts are implemented correctly and at the right moment in the user journey — not slapped in as afterthoughts.

Post-Launch Support

We stay available for crash triage, OS version compatibility issues, and feature iterations after launch — mobile apps require ongoing maintenance that doesn't stop at release.

How It Works