We build native iOS, Android, and cross-platform mobile apps using Swift, Kotlin, React Native, and Flutter. From consumer apps with social features to enterprise tools with offline sync — we deliver polished, high-performance applications from concept to App Store and Play Store.
ZTABS Mobile Apps: We build native iOS, Android, and cross-platform mobile apps using Swift, Kotlin, React Native, and Flutter. From consum 300+ clients, 500+ projects. Houston, TX.
ZTABS provides mobile apps — We build native iOS, Android, and cross-platform mobile apps using Swift, Kotlin, React Native, and Flutter. From consumer apps with social features to enterprise tools with offline sync — we deliver polished, high-performance applications from concept to App Store and Play Store. Our capabilities include native iOS development, native android development, cross-platform development, and more.
40+ React Native and Flutter apps shipped to the App Store and Google Play — average TestFlight-to-public-release in 3 weeks, with 4.5★+ ratings on the apps still in active production.
Mobile app development in 2026 is a choice between three paths: native (Swift for iOS, Kotlin for Android), cross-platform (React Native, Flutter), or progressive web apps. Each has real trade-offs in performance, development speed, and maintenance cost — and most agencies push whichever they specialize in. We build all three and recommend based on your actual requirements.
For consumer apps where 60fps animations and platform-specific gestures matter, we build native. For business apps, internal tools, and MVPs where shipping speed and budget matter more than pixel-perfect platform fidelity, we build cross-platform with React Native — one codebase, two app stores. We handle the full lifecycle: UX research and wireframing, UI design in Figma, development with CI/CD pipelines, App Store and Google Play submission (including navigating review guidelines), and post-launch analytics and iteration.
We also integrate AI features into mobile apps — on-device ML models for real-time processing, LLM-powered chat interfaces, voice assistants, and camera-based AI features like object detection and document scanning. Our mobile team has shipped apps across healthcare (HIPAA-compliant patient portals), fintech (payment apps, banking interfaces), e-commerce (shopping apps with AR try-on), and enterprise (field service tools, inventory management).
Core capabilities we deliver as part of our mobile apps.
Create high-performance iOS apps using Swift and SwiftUI that perfectly integrate with Apple's ecosystem and provide a seamless user experience.
Build robust Android applications using Kotlin and Jetpack Compose that reach millions of users across different devices and screen sizes.
Develop cost-effective solutions that work on both iOS and Android using React Native or Flutter, maintaining native-like performance and feel.
Maximize your app's visibility and downloads with strategic ASO, compelling store listings, and conversion rate optimization.
Ensure your app runs smoothly with optimal loading times, efficient battery usage, and seamless offline functionality.
Keep your app up-to-date with regular updates, bug fixes, and performance improvements to maintain user satisfaction.
Our team picks the right tools for each project — not trends.
React Native empowers businesses to build high-quality mobile applications quickly and cost-effectively. By leveraging a single codebase for both iOS and Android, companies can significantly reduce development time and investment while enhancing user experience.
Flutter empowers businesses to develop high-performance applications rapidly across multiple platforms, reducing time-to-market and development costs. Leverage its robust features to enhance customer engagement and drive revenue growth seamlessly.
Swift technology empowers organizations to streamline operations, enhance productivity, and drive innovation. With rapid deployment and high scalability, businesses can adapt swiftly to market changes and achieve measurable results.
Kotlin empowers businesses to build robust, high-performance applications faster and with fewer resources. Leverage its modern features to streamline development, reduce costs, and enhance productivity across your teams.
Unlock unprecedented efficiency and scalability with Expo's cutting-edge technology. Our solutions empower businesses to drive innovation, reduce costs, and enhance productivity, ensuring you stay ahead in a competitive landscape.
Every mobile apps project follows a proven delivery process with clear milestones.
We analyze your requirements, define the app's scope, and create a detailed development roadmap.
Our designers create intuitive interfaces and user flows that align with platform guidelines and your brand identity.
We follow agile development practices with regular testing to ensure quality and stability.
Rigorous testing across multiple devices and platforms to ensure a bug-free experience.
We handle the entire submission process for both Apple App Store and Google Play Store.
Continuous monitoring, performance optimization, and regular updates to keep your app competitive.
What sets us apart for mobile apps.
We prioritize user experience with intuitive interfaces, smooth navigation, and engaging interactions that keep users coming back.
Our development team stays current with the latest mobile technologies and best practices to deliver high-quality, future-proof applications.
Whether you need a native app or a cross-platform solution, we help you choose and implement the best approach for your business.
We build apps with scalable architecture that can handle growing user bases and evolving feature requirements.
Our iterative approach ensures rapid development cycles, regular updates, and the flexibility to adapt to changing requirements.
We provide comprehensive maintenance, monitoring, and support services to ensure your app stays performant and up-to-date.
Projects typically start from $10,000 for MVPs and range to $250,000+ for enterprise platforms. Every engagement begins with a free consultation to scope your requirements and provide a detailed estimate.
Across our portfolio, we track delivery patterns to improve outcomes. Our internal data from 2023-2026 shows:
| Alternative | Best For | Cost Signal | Biggest Gotcha |
|---|---|---|---|
| No-code app builders (Glide, Adalo, FlutterFlow, Bubble Mobile) | Internal tools, event apps, simple directories, and MVP validation where App Store presence matters more than performance. | $30–$200/month platform fees; build time 20–80 hours (indicative). | Most get rejected from the App Store under Guideline 4.2 (minimum functionality) if they're a thin wrapper. Push notifications, background tasks, and native device APIs either don't work or require the paid tier. |
| Cross-platform freelancer (React Native / Flutter) | A second platform port of an existing app, or a 4–6 screen MVP with well-defined designs and APIs already in place. | $30–$120/hour; typical small app $8K–$30K (indicative). | App Store / Play Store publishing is a separate skill — expect to burn 2–4 weeks on Apple rejections (missing privacy manifests, sign-in with Apple, subscription rules). Most freelancers don't own the Apple Dev account handoff. |
| Boutique mobile agency (ZTABS tier) | Consumer apps, regulated industry apps (fintech, health), and B2B apps with offline sync or complex state management. | $90–$180/hour; $40K–$180K per app (indicative). | Cross-platform (React Native/Flutter) saves 30–40% over native, not 50% — the native bridging for camera, biometrics, and payments always takes longer than estimated. Plan for 20% buffer. |
| Native specialists (Swift-only or Kotlin-only shops) | Platform-flagship apps requiring SwiftUI, Live Activities, Widgets, WatchOS, or heavy camera/CoreML work where performance matters. | $140–$240/hour; $100K–$500K per platform (indicative). | You pay twice (iOS team + Android team) or ship 6 months apart. Feature parity slips as each platform team optimizes to its idioms. Fine for Netflix; expensive for a 10K-user B2B app. |
| In-house mobile team | Sustained product roadmap with 2+ years of feature work, weekly releases, and a product manager who understands mobile release cadences. | $220K–$280K/year loaded per senior iOS or Android engineer (US); $100K–$160K nearshore (indicative). | Mobile senior engineers are 30–50% scarcer than web. Typical hiring cycle 4–6 months per role. Losing your only iOS engineer in month 14 stalls release trains for 2–3 months. |
Cross-platform vs. dual native. React Native or Flutter for iOS+Android runs $40K–$120K per product; two native codebases (Swift + Kotlin) run $80K–$240K. Savings are 30–45%, not 50% — native bridges for camera, BLE, payments, and background tasks eat back 15–20% of the theoretical savings. Pick cross-platform unless you need SwiftUI Live Activities, sub-16ms graphics, or deep platform integrations. At scale, Facebook, Shopify, and Discord all use React Native successfully. Native app vs. PWA. A Progressive Web App costs 30–50% of a native equivalent and publishes instantly. Trade-off: no App Store distribution, no push on iOS (until iOS 16.4+), limited background tasks, and a psychological 'not a real app' perception that halves install rates in consumer segments. For B2B internal tools and content apps, PWA wins. For consumer apps competing in the App Store, native/cross-platform wins because the App Store IS the marketing channel. Agency vs. in-house. A senior React Native engineer in the US costs ~$240K/year loaded. A ZTABS 10-week cross-platform build costs $50K–$90K and ships v1. Agency wins below ~1.5 FTE sustained mobile work (~$340K/year) and when you need both iOS and Android coverage. Above 2 FTE of sustained mobile backlog (weekly feature releases), in-house starts to win on unit cost in year 2.
A client's fitness app passed internal QA and external beta — Apple rejected twice for 'insufficient native functionality' because 80% of screens were WebView-rendered. Fix: we rebuilt the 4 primary screens in native SwiftUI, kept settings and content WebView'd, and added HealthKit integration for credibility. Apple approved on the third submission. Budget 2–4 weeks for App Store rejection cycles on first-time submissions.
A client's push delivery dropped overnight from 94% to 79%. Root cause: APNs certificate expired silently 6 weeks earlier, but messages still 'sent' (appearing successful) — just never delivered. Fix: switch to APNs token-based auth (no expiry), monitor BadDeviceToken/Unregistered response codes, and alert when delivery rate drops >5% in a 15-minute window.
Google's Data Safety declaration caught an unused Facebook SDK still bundled in the APK collecting advertising ID. Rejection held release 9 days while we removed the SDK, updated the declaration, and re-uploaded. Rule: audit the APK/AAB with aapt dump permissions + dependencies plugin before every release, not after submission.
A team using Expo EAS Update pushed a bundle that crashed on Android 9 due to an unpatched Hermes regression. 40% of Android users hit the crash in 6 hours before staged rollback kicked in. Fix: always stage OTA updates at 5% → 25% → 100% over 24–72 hours, and gate by OS version. Never push OTAs on Fridays.
App Store server-to-server receipt validation intermittently returned status 21003 ('receipt could not be authenticated') for ~0.4% of transactions. Users saw the charge but no premium features. Fix: retry with exponential backoff up to 3x, fall back to StoreKit 2's Transaction.currentEntitlements for entitlement state, and run a nightly reconciliation job against Apple's notifications v2 webhooks.
Verified reviews from real client engagements — sourced from our public testimonial archive and Clutch profile.
My experience is throughout positive. Communication, service, the short response times and the flawless execution of a challenging topic was absolutely great. ZTABS is definitely my first choice again.
Christian Neff
Bank Software Advisory · Bank Software Advisory
Fintech
Fantastic Agency! I couldn't fault them even if I tried. They always go above and beyond to meet your expectations and always produces quality work. Thank you ZTABS.
Stephanie Kal
CEO · Beauty Finder Australia
Marketplace
It has been great working with ZTABS. They bounce off the ideas along the way. Amazing Experience.
Joel Rowe
CEO · Drill Quoter
Marketplace
We don't just contract — we ship and operate our own software. 17 products in production.
Find answers to common questions about our mobile apps.
The development timeline varies based on the app's complexity, features, and platforms. A basic app might take 3-4 months, while a complex app could take 6+ months.
We build production-grade AI systems — from machine learning models and LLM integrations to autonomous agents and intelligent automation. 17 production SaaS products shipped, 300+ clients served.
We build modern web applications using Next.js, React, and Node.js — from marketing sites and dashboards to full-stack SaaS platforms. Every project ships with responsive design, SEO optimization, and performance scores above 90 on Core Web Vitals.
End-to-end SaaS development from MVP to scale — multi-tenancy, Stripe billing, role-based access, and cloud-native architecture. We have built and shipped 17 SaaS products of our own, serving 50,000+ users. Next.js, Node.js, PostgreSQL, AWS and Vercel.
Custom e-commerce development for B2C and B2B — Shopify, Shopify Plus, headless commerce with Next.js, and fully custom storefronts. Payment integration, inventory sync, and conversion-optimized checkout flows. 50+ stores built across retail, fashion, food, and wholesale.
Get a free consultation and project estimate for your mobile apps project. No commitment required.
