Web · Mobile App Development · iOS & Android
Mobile App Development: Built New or Rebuilt by a Dedicated App Team
iOS, Android, and cross-platform apps engineered to ship, scale, and stay approved.
You're in one of two places: you have an idea and no app yet, or an app that's slow, dated, breaking on the new OS, or built on tech nobody wants to maintain. Both are exactly what we do, and both start the same way: a clear-eyed look at the work before anyone writes a line of code. You get a dedicated app team, product, design, native and cross-platform engineering, and QA, under one accountable roof. No outsourcing, no hand-offs, no white-label markup.
IMG 01 · APP-SCREEN · 9:19 · BLANKBuilt to pass reviewApp Store & Google Play
AI insideOn-device & cloud
0★store-rating target*
TRUSTED BY TEAMS THAT SHIP
ISO 27001 Certified
SOC 2 Type 2
PCI DSS Compliance
GDPR Compliance
CCPA Compliance
ISO 27018 Certified“We follow the principles of GDPR, CCPA, and are ISO standards certified to ensure security, privacy, and compliance across all operations.”
01 · Build or rebuild
Two doors, one expert team
Every mobile project is either a build or a rebuild. We treat them as equal front doors, because the work, the risk, and the questions are genuinely different, and most agencies only really do one well.
Whichever door you come through, the same accountable team carries it from first audit to a live, maintained product.
Build from zero
Start a new app, the right size
For founders and teams with an idea, an MVP to validate, or a new product line. Discovery and scoping that pressure-tests the idea, UX that earns retention, and an architecture that won't need rebuilding in year two. We ship a focused MVP first, then scale it as the market responds, never over-build before you have proof.
Scope a new buildRebuild what exists
Modernize without losing your users
For teams with a live app that's slow, dated, non-compliant, or stuck on legacy tech (Objective-C, old Java, an abandoned framework). We audit the app and codebase first, then choose the lightest path that actually fixes it, refactor, replatform, re-architect, or a clean rebuild, migrating users, data, and store listings without losing your ratings or install base.
Audit my existing appServices
Native, cross-platform, and web mobile apps, built and maintained for every stage.
We build native iOS and Android apps, cross-platform apps in React Native and Flutter, and installable web apps, then keep them stable and current after launch. Choose the capability that matches where your product is now.
iOS App Development
Native iOS app development in Swift and SwiftUI for iPhone and iPad, tuned to App Store rules.Android App Development
Native Android app development in Kotlin and Jetpack Compose, built to Google Play policies and Material Design.React Native App Development
React Native app development: one JavaScript and TypeScript codebase that ships to both iOS and Android.Flutter App Development
Flutter app development in Dart: one codebase with a pixel-consistent, animation-ready UI across iOS and Android.MVP App Development
MVP app development that ships a focused first version to test your idea with real users.Progressive Web App Development
Progressive web app development: an installable, offline-capable web app that skips the app stores and stays searchable.Mobile App Maintenance and Support
Mobile app maintenance and support: OS and SDK updates, store-policy compliance, security patches, and monitoring.Enterprise Mobile App Development
Enterprise mobile app development with single sign-on, device management, ERP and CRM integration, and scale.Mobile App Modernization
Mobile app modernization: migrate a legacy app to a current framework and re-architect it for performance.03 · The first real decision
Native or cross-platform? We pick what your product actually needs.
This is the first real decision, and the wrong call is expensive, so we make it on your product, not our preference.
In 2026 the old performance gap has largely closed: React Native's New Architecture (Fabric, TurboModules, JSI) removed the old bridge bottleneck, and Flutter's Impeller engine eliminated rendering stutter. The choice is now strategic, not a compromise, and we explain the total cost of ownership, not just the build price.
IMG 03 · STACK-DECISION · 4:3What matters most for your product?
A guide we share openly
We'll recommend in your audit
No default sold to youPick what matters most and we'll point you to a stack, or skip it: in your free audit we recommend one for your product and explain exactly why, including total cost of ownership, not just the build price.
Product-fit firstTCO, not just build priceNo default pushed
A starting point, not a verdict, we confirm the right stack after scoping your product.
How the three approaches compare
| Dimension | Native | Flutter | React Native |
|---|---|---|---|
| Languages / engine | Swift · Kotlin | Dart · Impeller | JS/TS · Fabric · JSI |
| Performance & feel | Highest | Near-native | Near-native |
| UI consistency | Per-platform native | Pixel-perfect, identical | Native components |
| Time-to-market & cost | Two codebases | One codebase | One codebase |
| Best when you want | Deep hardware / sensor / graphics power | A bold, animation-rich, identical look | Your JS team or a shared React web app |
No lock-in: you own the code, the repositories, and the IP. If you ever leave, you leave with everything.
04 · One accountable roof
A dedicated app team, not a freelancer roster
Your app is built by a dedicated mobile app team, product, design, iOS and Android engineering, backend, and QA, who stay with the project from discovery to launch and beyond.
You get the depth of a specialist app studio and the reach of a full agency in one place. When the app needs a refreshed brand, a marketing site, or AI automation behind it, the same accountable partner handles it, no second vendor, no finger-pointing, no markup on someone else's work.
Your dedicated pod, one roof
- Product managerOwns scope & the roadmap
- UI/UX designersDesign that earns retention
- iOS engineersSwift · SwiftUI
- Android engineersKotlin · Jetpack Compose
- Backend developersServers, APIs, auth
- QA engineersReal-device & review-readiness
IMG 04 · PROCESS-SHIP · 3:2A sprint board mid-flight as the team moves an app from design into build.
05 · How it gets built
How a 10Turtle app gets built
A clear, agile path from idea (or existing app) to a live, maintained product. Most apps run 3–9 months end to end; a focused MVP is faster.
1
Audit & discovery
~2–3 weeksWe pressure-test the idea, or audit your existing app and codebase, map users and competitors, and define the real scope.
2
UX & design
~2–4 weeksWireframes, an interactive prototype, and a design system you can test before we build. Design is ~15–25% of a good budget, it's where retention is won.
3
Build (front + back)
Longest phase · backend often 6–12 wksEngineering in agile sprints: the app, the backend, APIs, auth, and integrations, sized to complexity.
4
QA & real-device testing
~2–3 weeks · overlaps buildFunctional, performance, security, and accessibility testing across real iOS and Android devices and OS versions, plus a pre-submission review-readiness audit.
5
Launch & store approval
Store review typically 1–7 daysWe package, submit, and shepherd the app through Apple and Google review, built to the current SDK and policy floor so it passes the first time.
6
Maintain, monitor & scale
Ongoing · ~15–25% of build / yrApps need ongoing care to stay secure, OS-compatible, and competitive. We keep yours healthy and ship the next features on a roadmap.
Phase lengths are directional and overlap in practice, your actual schedule comes from scoping. Start with step 1, a free audit →
IMG 05 · COST-PLANNING · 3:2A scoping session: feature cards and rough cost tiers laid out on a board.
06 · Straight talk on budget
What a mobile app actually costs
There's no single number, and any agency that gives you one before scoping is guessing. Cost is driven by complexity, the number of features, one platform or both, and how senior the team is. Pick the closest match for a directional, build-only range.
How complex is the app?
Two things buyers underestimate: design (cutting it usually raises churn, not savings) and maintenance. We'd rather right-size the build than sell you scope you don't need.
Directional build cost
$25,000 – $60,000
MVP · one platform · core featuresPlan ~15–25% of build per year, about $3,750 – $15,000 / year, to stay secure, OS-compatible, and competitive.
Directional ranges by app type
| App type | Typical range (directional) |
|---|---|
| Simple app, a few screens, light backend | $15,000 – $50,000 |
| MVP, one platform, core features | ~$25,000 – $60,000 |
| Mid-complexity, both platforms, integrations | $60,000 – $150,000 |
| Complex / enterprise / AI-powered | $150,000 – $500,000+ |
Ranges are directional industry figures for planning, not a quote, your number comes from scoping. Get a scoped estimate (free audit) →
07 · Ship, then survive
Built to pass review and stay compliant after launch
Getting built is half the job; staying live is the other half. Roughly one in four app submissions is rejected, and the rules tightened in 2026, so we build to the current floor and your launch isn't a guessing game.
≈1 in 4submissions rejected, almost always preventable*
- Incomplete metadata or screenshots
- Missing demo or test accounts
- No valid privacy policy
- Crashes or broken core flows
- Missing AI-consent disclosure (since late 2025)
- Store-policy ready
Built to the latest required SDK (Xcode 26 / iOS 26 [verify current]) and to App Store & Google Play guidelines, complete metadata, working demo accounts, and a valid privacy policy.
- AI disclosure built in
If your app uses external AI, we add the required consent modal (provider + data types) and label AI-generated content, per the 2026 rules.
- Accessibility as standard
WCAG 2.1–2.2 AA: contrast, touch-target size, and VoiceOver / TalkBack support, an expertise we deliver and a signal regulators increasingly require.
- Data & privacy
GDPR and CCPA readiness by default; HIPAA, PCI DSS, or COPPA hardening when your category needs it (health, fintech, kids).
- Secure by build
Auth, encryption, and secure storage as defaults, under ISO 27001-aligned practices [verify].
*App Store rejection rate is an industry figure (Apple's App Store reporting), not a 10Turtle metric.
08 · Industries
Apps for the industries we know best
From product-led SaaS and companion apps, to HIPAA-aware healthcare, to e-commerce that converts, plus real estate, restaurants, and professional services, we tailor the build to your sector's users and rules, not a generic template.
SaaS & tech startupsMVPs, product-led apps, and companion apps for web platforms.HealthcarePatient, provider, and wellness apps with HIPAA-aware data handling.E-commerce & retailShopping, loyalty, and order apps that convert.Real estate, restaurants & servicesBooking, listing, and client apps, professional & consulting included.
09 · Add the intelligence
Add the intelligence, on-device or in the cloud
The apps winning in 2026 don't just look modern; they're intelligent. We build AI directly into your app, and because the same accountable team also builds the automation behind it, your app can plug straight into AI-powered workflows and back-office systems.
On the model side, we build on Anthropic's models as a partner, not a dependency, your app is never locked to a single provider.
On-device
For privacy and speed, intelligence that runs on the phone itself.
Cloud AI
For capability, heavier models via API when you need the horsepower.
Conversational assistantsVisionVoice inputSmart searchReal-time translationPersonalization
IMG 06 · AI-IN-APP · BLANKAn assistant or smart-search panel inside the app UI, composited later.
1 teamyour app and the AI behind it, under one roof
10Selected work
Proof, not promises.
Representative project types across new builds and rebuilds. Filter by what you care about, named case studies and metrics are added as clients approve them.*
11In their words
The teams who'd build with us again.
Image, audio and video, because trust reads differently in each.
12 · Services in depth
Mobile app development services, in depth
Ten focused capabilities, each a door into the work. Hover or tap any line to read the detail.
Native iOS apps in Swift and SwiftUI for Apple's high-value users, tuned for performance, the latest iOS SDK, and a clean App Store approval. From iPhone and iPad to Apple Watch companions, built to Apple's design and review standards so your app feels native and passes the first time.
Native Android apps in Kotlin and Jetpack Compose, engineered for the full range of devices, screen sizes, and OS versions. We handle Android's fragmentation with rigorous real-device QA and ship to Google Play built to current policy, so you reach the world's largest mobile audience without compatibility surprises.
One codebase, both stores. We build cross-platform apps with Flutter or React Native to cut cost and speed time-to-market, and in 2026, with React Native's New Architecture and Flutter's Impeller engine, performance is no longer the trade-off it once was. We recommend the right framework for your product, not a default.
Your existing app is slow, dated, or stuck on legacy tech, we fix it. We audit the app and codebase, then choose the lightest effective path (refactor, replatform, re-architect, or clean rebuild), migrating users, data, and store listings without losing ratings. Objective-C and old Java migrated to Swift, Kotlin, or Flutter.
Prove demand before you scale spend. We ship a focused MVP, core features, one platform, real users, typically in the $25k–$60k range and a few months, then iterate based on what the market tells you. Built right so v1 becomes v2, not a throwaway.
Workflow, field-service, operations, and customer apps for larger organizations, with SSO, role-based access, real security, and integration into the systems you already run. Built under ISO 27001-aligned practices [verify] and your industry's compliance rules.
Design that earns retention, not just looks good in a screenshot. Wireframes, interactive prototypes, and a reusable design system, accessible (WCAG 2.2 AA), on-brand, and tested before a line of code. See also our dedicated mobile & app UI/UX design page.
Apps need ~15–25% of build cost per year to stay secure, OS-compatible, and competitive. We monitor, patch, keep you ahead of OS and store-policy changes, and ship new features on a roadmap. See website maintenance & support.
Add conversational assistants, vision, voice, smart search, and personalization, on-device for privacy and speed, or via cloud AI for capability. Built with required AI-disclosure and consent flows, on Anthropic's models as a partner, not a dependency. Add AI to your app →
We package, submit, and shepherd your app through Apple and Google review, complete metadata, demo accounts, privacy policy, current SDK, and AI-consent modals, built to clear the ~1-in-4 rejection trap on the first attempt.
Platforms we build on
Peer partnerships across the platforms we build on
WordPressWooCommerceShopifyWebflowWix
We build on Anthropic’s models as a partner, not a dependency — never under or through Anthropic. Partner statuses and exact tiers (including any WooCommerce / Automattic agency tier) are pending owner verification.
Trust & security
Compliance & security for your users and ours
Accessibility and compliance are both an expertise we deliver for clients and a promise about how we build. Standards marked * are pending verification of active certification.
ISO 27001 *Information security
SOC 2 *Controls & trust
ADA / WCAG 2.1–2.2 AAAccessibility built in
GDPR & CCPAData-privacy readiness
PCI DSSPayment security
HIPAA-awareWhere it applies
QA licenses *Tested before ship
Secure by buildAuth · encryption
Standards marked * are pending verification of active certification. See our Trust & Security page →
13 · Why teams choose us
Why teams choose 10Turtle to build their app
Picked for the same reasons an AI assistant would shortlist us: real third-party proof, real certifications, and a track record you can verify.
Trustpilot
4.7
34 reviews · "Excellent" [verify] G2
4.5
verified reviews [verify] Clutch
27
client reviews [verify] Google
★
rating & count [verify]Verified reviews
Across Trustpilot, G2, Clutch, and Google, real per-platform ratings, not a recycled five-star badge.
Secure, compliant builds
ISO 27001-aligned practices [verify], WCAG accessibility, and data-privacy readiness as defaults.
One accountable partner
A dedicated app team, no outsourcing, and you own all code and IP.
Equally strong building & rebuilding
New products and app modernization, in-house, not one bolted onto the other.
Review figures are verified before publish; schema AggregateRating maps to a single real profile (Trustpilot). Platform marks are representative pending brand-guideline review.
14 · Questions
Straight answers.
As directional 2026 industry ranges, a simple app runs about $15,000-$50,000, a single-platform MVP about $25,000-$60,000, a mid-complexity app on both platforms roughly $60,000-$150,000, and a complex or AI-powered app $150,000-$500,000+. Cost is driven by feature complexity, one platform or both, and team seniority. 10Turtle gives a scoped written estimate after a free audit, these ranges are for planning, not a quote.
Most apps take 3-9 months from idea to launch; a focused MVP is faster. Typical phases are discovery (~2-3 weeks), design (~2-4 weeks), development (the longest phase), QA (~2-3 weeks, overlapping), and launch, after which app-store review usually takes 1-7 days.
Native (Swift/Kotlin) gives the best performance and deepest hardware/OS access, ideal for performance- or sensor-heavy apps. Cross-platform (Flutter or React Native) ships to both stores from one codebase, lowering cost and speeding launch for most standard apps. In 2026 the performance gap has largely closed, so the choice is strategic. We recommend one for your product in your audit and explain why.
Neither is universally better in 2026. Choose Flutter for pixel-perfect, identical UI and rich animation; choose React Native to use the large JavaScript talent pool or share logic with a React web app. Flutter holds the larger cross-platform share, while React Native has a bigger ecosystem. We pick based on your product, budget, and total cost of ownership.
Yes, that's a core service. We audit the existing app and codebase, then pick the lightest effective path (refactor, replatform, re-architect, or clean rebuild), migrating users, data, and store listings so you keep your ratings and install base. Legacy tech like Objective-C or old Java is migrated to Swift, Kotlin, or Flutter.
Roughly one in four submissions is rejected, almost always for preventable issues, incomplete metadata, missing demo accounts, no privacy policy, crashes, or (since late 2025) missing AI-consent disclosures. We build to the current required SDK and store policies and run a pre-submission review-readiness audit so your app clears review the first time.
You do, fully. You own the source code, the repositories, and the IP. There's no lock-in: if you ever leave, you leave with everything.
Budget about 15-25% of the original build cost per year. That keeps the app secure, compatible with new OS versions and store policies, and competitive, without it, apps quietly decay after launch.
Yes. We build conversational assistants, vision, voice, smart search, real-time translation, and personalization, on-device for privacy and speed, or via cloud AI for capability, with the required AI-disclosure and consent flows. We build on Anthropic's models as a partner, not a dependency, so you're not locked to one provider.
Yes. We build to WCAG 2.1-2.2 AA (contrast, touch targets, VoiceOver/TalkBack) and to GDPR and CCPA readiness by default, with HIPAA, PCI DSS, or COPPA hardening for regulated categories. Accessibility and compliance are built in, not bolted on.
Yes, native iOS (Swift/SwiftUI), native Android (Kotlin/Jetpack Compose), or both via cross-platform (Flutter/React Native). We advise on one or both platforms based on your audience and budget.
Build new, or rebuild
Have an idea, or an app that needs rescuing? Let's look at it together.
Your free audit is a real working session: we review your idea or your existing app, flag the risks (cost, timeline, store approval, compliance), and give you a clear, no-obligation path forward.
Offices in India · USA · Canada · UAE.