Cloud Solutions
SpaGreen Creative is a senior mobile app development company trusted by 8,200+ clients across 110+ countries. We have shipped 350+ products including native iOS apps in Swift, native Android apps in Kotlin and cross-platform builds in React Native and Flutter — most of them sitting at a 4.5★+ App Store and Google Play rating after launch.
Whether you need a consumer app with offline mode and push notifications, a B2B field-ops app with role-based access, or a companion mobile app for an existing SaaS, our iOS and Android app development services combine product designers, native engineers and a release manager who actually understands App Store Connect and Play Console policy.
Every engagement starts with a fixed-price discovery sprint, a written architecture decision record and clear store-submission checklists — so you never burn 3 review cycles on avoidable rejections.
Common mobile app challenges we solve
Most mobile teams we meet aren't blocked by features — they're blocked by platform realities (review queues, OS fragmentation, flaky networks). Here's where teams typically get stuck and how we unblock them:
- "Our React Native app freezes on Android." We profile with Flipper, fix the JS-thread blockers and move hot paths to native modules so frame rate stays at 60fps.
- "App Store rejected our submission 3 times." We rewrite the App Review submission, fix IDFA/ATT, sign-in-with-Apple and privacy nutrition labels — and ship a re-submission in days, not weeks.
- "Push notifications are unreliable." We replace fragile FCM/APNs setups with OneSignal or a tested fan-out service, add delivery analytics and silent-push retry logic.
- "Offline sync is broken." We implement WatermelonDB or Realm with conflict resolution, queued mutations and a clear sync state UI so users trust the app on a flaky train Wi-Fi.
- "TestFlight beta workflow is chaos." We wire up Fastlane + EAS Build (or Bitrise) so every PR auto-ships a versioned build to TestFlight and Play Internal Testing — no more "where's the latest build?".
What you get with our mobile app development services
Every mobile app we ship is built on a hardened template that has powered consumer apps with millions of installs and B2B apps that field teams use every day. You get framework speed with native polish:
- Native iOS (Swift, SwiftUI) & native Android (Kotlin, Jetpack Compose) builds
- Cross-platform React Native & Flutter for shared 80%+ codebases
- Offline-first storage with Realm, WatermelonDB or SQLite + sync queues
- Push notifications via OneSignal, FCM & APNs with delivery analytics
- In-app purchases & subscriptions via RevenueCat (StoreKit 2 + Play Billing)
- Sign in with Apple, Google, biometrics (Face ID, Touch ID, Android Biometric)
- Deep links, universal links, App Links & deferred deep links for growth
- App Store Connect & Play Console submission, ASO assets & release notes
- Crash reporting & observability with Sentry, Firebase Crashlytics & Datadog RUM
- CI/CD via Fastlane, EAS Build & Bitrise — every PR ships a beta build
Our 4-step mobile app development process
A predictable, sprint-based process that turns ideas into 5-star apps. Every sprint ends with a TestFlight or Play Internal build you can put in real users' hands — no slide decks pretending to be a product.
step 01
Discovery & UX (Week 1–2)
NDA-protected workshops, user-journey mapping, native vs cross-platform decision, App Store policy review, low-fi wireframes and a fixed-price proposal you can lock in.
step 02
Design & Build (Week 3–10)
Hi-fi UI, native components, API integration, offline sync, push notifications and in-app purchases — shipped in weekly TestFlight and Play Internal builds you can steer every Friday.
step 03
QA & Store Submission (Week 11–12)
End-to-end Detox/XCUITest, device-lab regression on iOS and Android matrices, App Store Connect & Play Console submission, ASO assets, privacy labels and a clean v1.0 launch.
step 04
Launch & Growth (Ongoing)
30-day free warranty, crash-free-session monitoring, ASO experiments, push-notification campaigns, OS-update compatibility and retainer plans so the app keeps climbing the charts.
From idea to 5-star app — without the rejections.
Talk to a senior mobile engineer on WhatsApp. We'll scope your iOS, Android or cross-platform app this week.
- Native apps from $9,500
- Cross-platform MVPs from $7,500
- App Store + Play submission included
- Reply in under 24 hours
Trusted by 8,200+ businesses · 110+ countries · NDA on request · Free quote in 24h
Tech stack we use for mobile app development
We pick mature, well-supported tools so your app keeps running smoothly through iOS and Android OS updates:
- Native iOS: Swift, SwiftUI, Combine, Core Data, StoreKit 2
- Native Android: Kotlin, Jetpack Compose, Coroutines, Room, Play Billing
- Cross-platform: React Native, Flutter, Expo, EAS Build
- Backend & data: Firebase, Supabase, Node.js, Laravel, GraphQL
- Notifications & payments: OneSignal, FCM, APNs, RevenueCat, Stripe
- Observability: Sentry, Firebase Crashlytics, Datadog RUM, Mixpanel, Amplitude
Questions about mobile app development
Cross-platform mobile MVPs (React Native or Flutter) start at $7,500. Native iOS or Android apps start at $9,500. Larger consumer apps with offline sync, in-app purchases and a custom backend typically scope between $25,000 and $80,000. You always get a fixed-price, itemized quote — never per-hour surprises.
A focused mobile MVP ships in 10 to 12 weeks. Apps with offline sync, in-app purchases, push notifications and a custom backend usually take 14 to 18 weeks. Every project starts with a 1–2 week discovery sprint that locks scope, timeline and price.
Native (Swift on iOS, Kotlin on Android) gives you the best performance, animations and access to new OS APIs the moment Apple or Google ships them — best for consumer apps, games and OS-deep integrations. Cross-platform (React Native, Flutter) shares 80%+ of code across iOS and Android, so you ship faster and cheaper — best for content, B2B, fintech and most MVPs. We help you pick during discovery.
Yes. We build native iOS (Swift, SwiftUI), native Android (Kotlin, Jetpack Compose) and cross-platform apps with React Native and Flutter from a single codebase. Most clients ship both stores simultaneously from day one.
Yes. We prepare the App Store Connect listing, screenshots, privacy nutrition labels, IDFA/ATT setup, sign-in-with-Apple flows and Play Console data-safety form. We submit, respond to reviewers and ship updates — typically clearing review in the first or second attempt.
Yes. We integrate StoreKit 2 on iOS and Play Billing on Android, usually via RevenueCat for unified entitlements, receipt validation, paywall A/B testing and refund handling. Apple/Google fees, free trials, intro pricing and grace periods are all standard parts of the template.
Yes. Every app ships with a free 30-day bug-fix warranty. After that, retainer plans (from $900/mo) cover iOS/Android OS-update compatibility, crash monitoring, feature work, ASO experiments and store-policy changes — so the app keeps its rating instead of decaying.
You do — 100%. We sign your NDA before discovery, deploy to your own Apple Developer and Google Play Console accounts, and hand over full source code, design files and CI/CD configuration when each sprint is paid.
SaaS Development
Multi-tenant SaaS backends with Stripe billing, SSO and RBAC — the perfect server side for your mobile app.
UI/UX Design
Native iOS & Android design systems, prototypes and motion that make your app feel premium.
API Development & Integration
REST & GraphQL APIs, third-party integrations and webhook plumbing your mobile app needs.
Cloud-Based Solutions
AWS, GCP and Azure architecture that scales your mobile backend without breaking the cost budget.
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