APP
iOS Native Android Native Cross-Platform

Apps Users
Can't Put
Down.

We build iOS & Android apps with React Native & Flutter — pixel-perfect interfaces, blazing performance, and engineered for 5-star App Store reviews from the very first release.

80+ Apps Shipped
50M+ Downloads
4.8★ Avg Store Rating
Pixel-perfect mobile app interface developed by DartSyn using React Native and Flutter
98% Crash-Free
Sessions
★★★★★ App Store
Custom iOS app UI design — DartSyn mobile development
Android app onboarding screen — DartSyn
React Native cross-platform app — DartSyn
Flutter mobile app development — DartSyn

One Team.
Every Platform.

Whether your users are on iPhone, Android, or both — we build experiences that feel native, perform flawlessly, and ship on schedule.

iOS Development

SwiftUI and UIKit apps that feel unmistakably Apple. Performance-optimised, App Store approved, and designed to leverage every iOS capability — from widgets to Face ID to Live Activities.

  • SwiftUI & UIKit
  • App Store submission & review
  • Face ID / Touch ID integration
  • WidgetKit & Live Activities
  • In-app purchases & subscriptions
  • Apple Watch & iPad companion apps
Android Development

Jetpack Compose and Kotlin apps built for the full Android ecosystem — from flagship devices to mid-range hardware. Material Design 3, edge-to-edge, and optimised for Google Play Store ranking.

  • Jetpack Compose & Kotlin
  • Google Play listing & ASO
  • Biometric & NFC support
  • Material Design 3
  • Google Wallet integration
  • Wear OS companion apps
Cross-Platform

One codebase. Two stores. Zero compromise. React Native and Flutter apps that look and feel native on both iOS and Android — without the 2× development cost or the 2× timeline.

  • React Native & Flutter
  • Shared logic, native UI feel
  • 60% faster time-to-market
  • Simultaneous iOS & Android launch
  • Hot reload & OTA updates
  • Native module bridging

Built For
Real Users.
Real Results.

Six core capabilities engineered into every app we ship — not bolted on as afterthoughts. This is the difference between an app users tolerate and one they open every day.

01

Performance-First Architecture

Sub-second cold starts, 60fps animations, and memory-optimised code paths. We profile, measure, and ship apps that feel fast on even mid-range devices — because your users notice.

Hermes EngineCode SplittingLazy Loading
02

Offline-Ready Apps

Works without Wi-Fi. Local-first data sync using SQLite, MMKV, and background queue processing so users never hit a dead end.

03

Push & In-App Notifications

Rich push notifications, in-app messaging, and deep-link routing that re-engages users at exactly the right moment.

04

Bank-Grade Security

End-to-end encryption, biometric auth, secure keychain storage, and OWASP Mobile Top 10 compliance built in from day one.

05

Analytics & Crash Reporting

Firebase Analytics, Mixpanel, Sentry, and custom funnels so you always know what users are doing — and what's breaking.

06

API Integration & Backend Connectivity

REST, GraphQL, WebSocket, and gRPC integrations with rock-solid error handling, token refresh, and retry logic — connected to your existing stack or our recommended infrastructure.

REST & GraphQLWebSocketsOAuth 2.0Background Sync

From Idea
to App Store
in 90 Days.

A battle-tested process refined across 80+ mobile projects. No scope creep. No missed launches. Just a clear path from first call to five-star reviews.

01
Week 1

Discovery & Strategy

We map your users, your market, and your goals. Platform decision, tech stack selection, and a product roadmap that keeps scope tight and delivery predictable.

02
Week 2–3

UI/UX Design

Figma prototypes that look and feel like a finished product before a single line of code is written. Human Interface Guidelines and Material Design — both, done right.

03
Week 4–10

Development & Testing

Sprints, daily builds, and continuous QA on real devices. Unit tests, integration tests, and end-to-end automation so bugs never make it to the store.

04
Week 11–12

Launch & Store Submission

App Store and Google Play submission, review navigation, ASO metadata, and a launch checklist built from 80+ successful releases. We handle it all.

05
Post-Launch

Growth & Iteration

Analytics reviews, user feedback loops, and sprint-based feature releases that compound growth month over month. Your app gets better — automatically.

RESULTS

Numbers That
Speak for
Themselves.

Apps Shipped
80+

From MVP to enterprise — every category, every vertical. Consumer apps, B2B tools, marketplaces, fintech, and healthtech.

Total Downloads
50M+

Across all client apps globally. Our launches don't just make the store — they make the charts.

Avg Store Rating
4.8

Weighted average across all shipped apps on App Store and Google Play. Reviews don't lie.

Crash-Free Sessions
98%

Monitored via Firebase Crashlytics and Sentry across production apps. Stability is not optional.

The Stack Behind
Every Great App.

We don't pick trendy tools — we pick the right ones. A stack refined across 80+ mobile projects to deliver performance, reliability, and maintainability.

Frameworks
Core build tools
React NativeCross-platform primary
FlutterCross-platform alternative
Swift / SwiftUIiOS native
Kotlin / ComposeAndroid native
ExpoRN managed workflow
Backend & APIs
Data & logic layer
FirebaseRealtime DB, Auth, FCM
Node.js / ExpressCustom REST APIs
GraphQLFlexible data fetching
SupabasePostgres + Auth
StripePayments & subscriptions
DevOps & QA
Ship & monitor
FastlaneAutomated deployment
Sentry / CrashlyticsError & crash tracking
GitHub ActionsCI/CD pipeline
Detox / JestE2E & unit testing
MixpanelProduct analytics

Questions
We Get Every
Day.

Everything clients ask us before signing. If your question isn't here, book a free call — we'll answer it in 30 minutes.

A typical MVP takes 8–12 weeks from design kickoff to App Store submission. More complex apps with custom backends, third-party integrations, or advanced features run 14–20 weeks. We give you a fixed timeline on week one — and we stick to it.

React Native is ideal if your team already uses JavaScript, you need deep third-party library support, or you plan to share code with a web app. Flutter is the better pick for pixel-perfect custom UIs, smooth animations, or when you want slightly more performance headroom. We help you decide based on your specific product — not our preference.

Yes — completely. We handle metadata writing, screenshot creation, privacy policy review, age rating selection, and all communication with Apple and Google during the review process. We've navigated 80+ submissions and know exactly how to get approved on the first attempt.

Absolutely. We integrate REST, GraphQL, WebSocket, and gRPC APIs — whether you have an existing backend, use a SaaS platform like Stripe or Twilio, or need us to build a custom API from scratch. Connecting your app to your business logic is a core part of what we do.

Launch is just the beginning. We offer ongoing sprint-based development for new features, priority bug fix SLAs, OS compatibility updates (so your app doesn't break when Apple ships a new iOS), and monthly analytics reviews. Most clients stay with us for 12+ months after launch.

SHIP
■ Free Consultation — No Commitment

Your App.
90 Days.
App Store.

Tell us your app idea. We'll scope it, plan it, and show you exactly how we'd build it — for free, with no obligation. Most clients get a proposal within 24 hours.

Free · No Commitment Response in 24hrs 80+ Apps Shipped
project_scope.md Active
Discovery call scheduled Free · 30 minutes
Proposal being prepared Fixed scope · Fixed price
Design sprint kicks off Week 1
App Store submission Day 90