Mobile app development company: senior iOS and Android teams

Ryz Labs is a mobile app development company that gives you senior teams to build and ship iOS and Android apps: native Swift and Kotlin, or cross-platform React Native and Flutter, plus the APIs behind them. Our engineers are in the top 1% of the tens of thousands we interview, work on US business hours, and own the full path from first build to App Store and Google Play releases.

What we build

An app development company should be judged on the apps it keeps running, not just the first launch. These are the mobile systems our teams build and maintain.

• Consumer apps: onboarding, sign-in with Apple and Google, push notifications, deep links, in-app purchases with StoreKit 2 and Google Play Billing, and analytics wired to your funnel.
• Fintech and account apps: biometric login, secure storage in the iOS Keychain and Android Keystore, card and payment flows, and certificate pinning where your threat model needs it.
• Field and operations apps: offline-first apps for drivers, technicians or inspectors that capture photos, signatures and barcodes and sync when the connection returns.
• Cross-platform apps: one React Native or Flutter codebase for both stores, with native modules where the shared layer falls short.
• Native rebuilds and modernization: moving Objective-C and Java apps to Swift and Kotlin, and UIKit or XML layouts to SwiftUI and Jetpack Compose, one screen at a time.
• Mobile back ends: the APIs, auth, push infrastructure and feature-flag services the app depends on, versioned so old app builds keep working.
• Release pipelines: fastlane, Xcode Cloud or GitHub Actions builds, code signing, TestFlight and Play internal testing tracks, and staged rollouts.

Need a single platform? See iOS app development and Android app development.

Native or cross-platform?

We don't push one answer. Native Swift and Kotlin fit apps that rely on platform features (widgets, Live Activities, background location, Bluetooth, camera pipelines) or need the best performance on older devices. React Native fits teams that already write TypeScript and React for the web and want to share logic and people. Flutter fits apps with a highly custom UI that should look identical on both platforms. Our comparison of Flutter vs React Native goes deeper.

How an engagement works

1. Talk. We review your product goals, designs if you have them, the existing app and back end, and your release history: crash rates, review ratings and what slows releases down.
2. Match. We propose a mobile team with names and a monthly price, sized to the platforms and the back-end work involved.
3. Join. The team works in your repos, joins your standups and design reviews on US hours, and sets up or adopts your build and signing pipeline.
4. Grow. After launch, keep the team on a release cadence, add a platform, or hand the app over to your mobile engineers.

Week 1 means getting the app building locally and in CI, access to App Store Connect and the Play Console, and a review of crash reports and store reviews. Month 1 usually includes a first release through TestFlight or an internal testing track. By month 3, the team ships on a regular cadence with staged rollouts and watches stability after every release. Pace depends on scope, design readiness and your onboarding.

The stack our teams work in

How we keep mobile releases stable

A bad web deploy can be rolled back in minutes. A bad mobile release sits on phones until users update. That changes how a senior mobile team works.

• Staged rollouts with a stop rule. App Store phased release and Play staged rollouts go out to a small share of users first. The team watches crash-free sessions and key funnels in Crashlytics or Sentry and pauses if they drop.
• Old versions in the wild. Some users run builds that are months old. APIs stay backward compatible, new fields are optional, and a minimum-version check can prompt or force an update when a breaking change is unavoidable.
• Feature flags. Risky features ship dark and turn on remotely, so a problem becomes a flag flip instead of an emergency release and another review cycle.
• Store review rejections. Our engineers keep privacy manifests, App Tracking Transparency prompts, Google Play Data safety forms and permission rationale current, so reviews don't block a launch.
• Device and OS fragmentation. Automated UI tests run on real devices through Firebase Test Lab or a device cloud, including older, low-memory Android phones, and each new iOS and Android beta gets tested before release day.
• Flaky networks. Requests retry with backoff, writes queue offline, and the UI shows a clear state instead of a spinner that never ends.

Team shapes and cost

Typical Ryz cost is $7,000–$15,000 per engineer per month, mostly mid-level to senior: mid-level (comparable to Amazon L5) $7,000–$10,000, senior (comparable to Amazon L6) $10,000–$15,000, and leads $15,000+, quoted per team.

• Cross-platform pair: 2 senior React Native or Flutter engineers. 2 × $10,000–$15,000 = $20,000–$30,000 per month.
• Native app team: 1 iOS, 1 Android and 1 back-end engineer, all senior. 3 × $10,000–$15,000 = $30,000–$45,000 per month.
• Full mobile product team: a tech lead, 2 iOS, 2 Android, 1 back-end and 1 QA engineer. 6 × $7,000–$15,000 = $42,000–$90,000, plus the lead at $15,000+, so roughly $57,000–$105,000+ per month.

You get a scoped plan, a price and the names of the people before you start.

Dedicated team or staff augmentation?

A dedicated development team fits a new app, a rebuild or a move from native to cross-platform, where one team owns design implementation, back end and release. Staff augmentation fits when you already have a mobile lead and need more hands: senior React Native developers or Flutter developers who work on your team and follow your release process.

When Ryz isn't the right fit

If you want a quick prototype from a self-serve freelance marketplace, or a no-code app builder, those are cheaper starting points. If you need engineers on European or Asian hours, a global network fits better. And if you need a branding agency to create your visual identity from scratch, start there and bring us the designs.

Related

• iOS app development
• Android app development
• UI/UX design
• MVP development

FAQ

How much does mobile app development cost with Ryz?

Typical cost is $7,000–$15,000 per engineer per month, mostly mid-level to senior, with leads at $15,000+ quoted per team. Total cost is team size × duration × monthly rate: a 3-person senior team for 4 months is 3 × 4 × $10,000–$15,000 = $120,000–$180,000.

How fast can a mobile team start?

After the scoping call we propose a team with named engineers. Most of the timeline depends on scope, design readiness and your onboarding, including access to your developer accounts.

Do you build both iOS and Android?

Yes, natively with Swift and Kotlin or with one cross-platform codebase in React Native or Flutter. We recommend based on your features, team and existing code.

Who owns the app and the store accounts?

You do. Apps are published under your Apple Developer and Google Play accounts, and the code lives in your repositories.

Can you take over an existing app?

Yes. Most of our mobile work starts with an existing codebase. The first weeks focus on builds, crash reports and test coverage before larger changes.

Questions we didn't answer? Email info@ryzlabs.com.