Trango Tech specializes in iOS app development, leveraging the latest Apple technologies to deliver highly functional apps. By harnessing the power of native Swift and SwiftUI, our developers build solutions for iPhone, iPad, Apple Watch, Apple TV, and Vision Pro.
Defining iOS application development services is easy, but finding a custom iOS app development company that actually delivers in the App Store is harder than you think.
Trango Tech has been a native iOS mobile app development company since the App Store opened in 2008. We build for iPhone, iPad, Apple Watch, Apple TV, and Vision Pro in Swift 6 and SwiftUI.
Stay here, and you’ll get to know everything you need to know before hiring a custom iOS app development company. Explore the real US cost range, a written SLA with response times, our true app store rejection rate, and an IP transfer downloadable clause before you sign in.
Get a free estimate for your app development project by completing the quick 5-step process. We’ll email you a detailed cost PDF report with a step-by-step breakdown, a timeline, and what's taking you up or down.
Pick the closest match. We'll fine-tune the estimate as you go.
iPhone is included by default. Each extra device adds a focused dev/QA stream.
Every checkbox maps to specific Apple frameworks and engineer hours.
Optional — skip this step if your app is standalone.
Free PDF with stage-by-stage breakdown, timeline, and what drives the number up or down. No sales calls unless you ask.
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Our custom iOS app development services range from a fixed-price MVP to multi-device Apple ecosystem services, leveraging native Swift, Objective-C migration, SwiftUI, and the latest Apple frameworks.
Greenfield native apps in Swift 6 / SwiftUI — built around your business logic, not a template.
Adaptive SwiftUI layouts that look and feel native on iPhone 15 Pro Max all the way down to iPhone SE.
watchOS apps with complications, Always-On display, fitness/health integration, and independent connectivity.
tvOS streaming, gaming, and enterprise apps with focus engine, top shelf, and Siri remote support.
Native visionOS apps using SwiftUI, RealityKit, and ARKit — or bring your existing iPad/iOS app to spatial.
Objective-C to Swift, UIKit to SwiftUI, Core Data to SwiftData. Painless migrations of legacy iOS codebases.
SpriteKit, SceneKit, RealityKit, Metal 3, GameCenter, Game Mode — from casual to console-grade titles.
1–2 week paid audit of your existing iOS codebase: architecture, security, App Store compliance, CI/CD.
Most agencies just stop at iPhone, but we built across the full Apple ecosystem with a shared Swift UI core, where it makes sense, cutting the total budget by 30-40% compared to building each platform separately.
From iPhone SE to Pro Max. Dynamic Island, ProMotion, Always-On display.
Stage Manager, Apple Pencil, multitasking, and Mac Catalyst handoff.
Complications, Smart Stack, HealthKit, Workout API, independent cellular.
Focus engine, Top Shelf, TVML, Siri remote, multiplayer GameCenter.
Spatial volumes, Immersive Spaces, RealityKit, hand tracking, eye gaze.
Most agencies tell you what they can build — not what you should build. This 4-question wizard tells you whether native Swift/SwiftUI, React Native, or Flutter fits your project. The recommendation is based on engineering trade-offs, not on what we want to sell you.
Native wins when you need top performance, deep iOS hardware (LiDAR, ARKit, HealthKit, Vision), Apple Intelligence integration, watchOS/tvOS/visionOS support, or App Store-quality UX. Cross-platform wins on iOS+Android with one team, faster MVPs, and lower long-run TCO when you're not stack-locked.
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The compliance, integrations and Apple frameworks each vertical actually needs — not generic features bolted onto a template.
HealthKit, ResearchKit, video consults, e-prescriptions.
HIPAAApple Pay, biometric auth, real-time fraud detection.
PCI-DSS · SOC 2AR property previews, MLS integration, mortgage calculators.
CCPAApple Pay, AR product try-on, loyalty, push merchandising.
PCI-DSSLive GPS, route optimization, driver app, customer ETA.
DOT-ELDSSO, MDM, SAP/Oracle/Salesforce integrations, offline-first.
SOC 2 · ISO 27001School Manager, Classroom, Schoolwork, content protection.
FERPA · COPPAOffline blueprints, Vision Pro walk-throughs, daily reports.
OSHA-readyHLS, AVKit, FairPlay DRM, AirPlay, SharePlay sessions.
DRM-FairPlayReal-time matching, in-app payments, ratings, dispatch.
PCI-DSSLive messaging, group video, push, content moderation.
GDPR · ATTiCloud sync, Sign in with Apple, Mac Catalyst, Universal Apps.
SOC 2Apple Intelligence opened the Foundation Models API to third-party apps in 2025. visionOS reshaped what spatial software looks like. SwiftData replaced Core Data. We ship with these — not around them.
Apple opened on-device LLM access to third-party apps in 2025. We integrate Foundation Models, Core ML, Vision, Natural Language and App Intents — for free, private, offline AI on every supported device.
Native visionOS apps in SwiftUI + RealityKit + ARKit, or bring your existing iPad/iOS app to spatial with depth, gestures, and Immersive Spaces. Our team is on the Vision Pro Developer Kit programme.
If your app is still UIKit + Core Data + completion handlers, we modernize it. The 2025 stack is Swift 6 strict concurrency, SwiftUI 6, SwiftData with #Index and compound uniqueness, async/await everywhere, Combine for streams.
Native iOS apps support new iOS versions on launch day — that's the whole point of native. Our internal WWDC tracker has every client app updated and tested against the iOS beta cycle, so your app ships compatible the day Apple's release goes live.
Apple rejected 12% of App Store submissions in Q1 2025 for Privacy Manifest violations alone. That number gets worse if you fail App Tracking Transparency disclosure or HIG compliance. We screen for all of it before we submit — not after.
Every iOS app we ship comes with a complete Privacy Manifest declaring data types, API usage codes, and third-party SDK access; an ATT prompt with explicit third-party data recipient disclosure as required by the 2025 ATT updates; and a regulatory profile matched to your industry — HIPAA, PCI-DSS, SOC 2, GDPR, CCPA.
Declared data types, API codes, third-party SDK disclosure. Mandatory since May 2024.
Permission prompts with named third-party data recipients per 2025 update.
BAA-ready architecture, end-to-end encryption, audit logging.
Tokenization, Apple Pay, no PAN at rest. PCI-DSS Level 1 ready.
Access controls, audit logs, least-privilege by default.
Data export, deletion, consent management, regional data residency.
Most agencies have six stages. The seventh is what makes the difference between an app that launches and one that bounces in App Store review.
Business goals, user research, technical architecture, fixed-scope SOW. You leave discovery with a written roadmap you can take to any other team if we're not the right fit.
Wireframes, interactive prototypes, pixel-perfect Figma designs that follow Apple's Human Interface Guidelines — navigation, typography, touch targets, accessibility, and Dynamic Type.
Swift module design, data layer (SwiftData / Core Data), API contracts, third-party SDK selection, security review, observability and crash reporting plan.
Two-week sprints in Swift 6 / SwiftUI / SwiftData with weekly TestFlight builds. You get a named iOS engineer + PM, daily Slack, and access to the Git repo from day one.
Functional, performance, security and VoiceOver testing across the iPhone / iPad / Watch / TV matrix. Accessibility audit. Memory leak hunt. Network resilience tests.
Privacy Manifest audit, App Tracking Transparency check, HIG compliance review, IAP/StoreKit validation, and full App Store Review Guideline coverage. We catch rejection causes before Apple does.
Submission, App Store Optimization (keywords, title, subtitle, screenshots, preview video, localization), launch monitoring, and a written SLA: P1 < 4 hrs, P2 < 1 business day, P3 < 3 days.
Fixed-price MVP for defined scope. Time & materials for evolving products. Dedicated iOS team for long-term roadmaps. Staff aug to extend in-house.
Defined feature set, defined timeline, defined cost. Best for first apps and validated MVPs.
For evolving scope and continuous discovery. Pay only for hours worked, with weekly burn-down reports.
A full pod — iOS engineers, designer, QA, PM — reporting to you for the long run.
Extend your in-house iOS team with our developers, working inside your tools, your standups, your Git.
There’re are no hidden charges for our iOS app development services. Every level includes separate phases: discovery, design, native iOS development, App Store submission, and post-launch support.
Founders verifying a single basic flow with up to 10 screens.
Usually, an e-commerce, fintech, or SAAS app. Custom UI Payments, real-time, third-party APIs
Includes development for multi-device, AR, Apple intelligence, deep enterprise integration, and regulated industries.
The numbers your fixed-price quote will be built on. Senior US iOS engineering rate: $120–$220/hour.
| iOS Feature | Native iOS hours | Backend hours | Design hours |
|---|---|---|---|
| Authentication + profile (Sign in with Apple, email, social) | 10–70 | 12–40 | 8–20 |
| Payments (Stripe, Apple Pay, IAP, subscriptions) | 20–200 | 30–120 | 12–30 |
| Push notifications + APNs (rich, actionable) | 8–20 | 14–30 | 3–8 |
| Geolocation + maps (MapKit, route, geofence) | 10–150 | 16–80 | 10–30 |
| Real-time chat (1:1, group, attachments) | 40–120 | 60–180 | 18–40 |
| Social login (Google, Facebook, Apple) | 10–30 | 8–20 | 2–6 |
| HealthKit / Workout / sensor integration | 30–120 | 10–40 | 12–30 |
| ARKit + RealityKit experience | 60–240 | 10–60 | 40–120 |
| Apple Intelligence / Foundation Models integration | 20–80 | 0–30 | 6–20 |
| Vision Pro / visionOS adaptation | 80–320 | 10–40 | 60–200 |
Estimates assume native Swift/SwiftUI. Actual hours depend on edge cases, business logic and integration depth — we send a fixed-price quote within 48 hours of discovery.
No Cordova, no 2019 frameworks. No, we use whatever you want. Modern Swift, modern SwiftUI, modern tooling with Objective-C and UIKit available when migrating legacy apps.
Each one has a proof point on this page. None of these are claims — they're contractual.
We've been building iPhone apps since the App Store opened in 2008. 500+ shipped iOS apps across 14 industries. No other agency in our tier can say that honestly.
IP transfer is in our MSA. You get the Git repo, signing certs, and Apple Developer account access at every sprint close. Sample IP clause downloadable — no email gate.
Stage 6 of our process. Privacy Manifest, ATT, HIG, IAP/StoreKit, full review-guideline coverage. 96% first-submit acceptance. If Apple rejects an app we submitted, we fix it free.
Native iOS apps support new iOS versions on launch day — that's the point of native. Our WWDC tracker has every client app tested against beta cycles, so users never wake up to a broken app.
Every retainer ships with a written SLA: P1 < 4 hrs, P2 < 1 business day, P3 < 3 business days. Named iOS engineer + PM. Not a generic "we'll be there."
Houston HQ + offices in Los Angeles, New York, Miami and Charlotte. US-based PM and iOS Practice Lead on every engagement. Global delivery scales the team without scaling the time-zone gap.
100% Privacy Manifest pass-through rate on every iOS app submitted in the past 18 months. We specialize in regulated industries — HIPAA, PCI-DSS, SOC 2, GDPR — where compliance isn't optional.
If we don't deliver against the agreed SOW within agreed milestones, you get your money back. We've never had to honor it — but it's there, in writing, in every contract.
Here are nine iOS apps from our portfolio. Just click on a card and read the full case study on Trango Tech.com. The design process, technical decisions, and results are clearly mentioned.
iOS app that lets construction professionals find jobs, post bids, and connect with contractors faster.
Courier delivery iOS app with live GPS tracking, dynamic dispatch, and seamless customer ETA notifications.
iOS platform for nightlife discovery, VIP reservations, loyalty rewards, and social engagement around live events.
HIPAA-ready telemedicine platform with 2,500+ doctors, HD video consults, e-prescriptions, and HealthKit integration.
Full retail digital transformation: iOS app, Flutter, HRMS, WMS, AI-powered call center.
On-demand cleaning service iOS app with real-time matching, in-app payments, dispatch and dynamic ratings.
AI-powered matchmaking iOS app digitizing the matchmaking process with smart matching and intuitive profile browsing.
Cross-platform iOS app strengthening the bond between churches and musicians through seamless event booking and discovery.
iOS app and Flutter mobile app revolutionizing marine transportation services with intuitive scheduling and tracking.
Collective ratings sourced from Clutch and other authentic firms with verified reviews.
Top Mobile App Development Co.
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Here are our verified testimonials with attached LinkedIn or Clutch review links. Click through and verify.
"They built a HIPAA-compliant iOS telemedicine app for us in 16 weeks — ATT, Privacy Manifest, the works. Apple approved it on first submission. We've shipped 7 updates with their team since."
"After two failed agency attempts, Trango Tech rebuilt our iOS retail app from scratch in Swift/SwiftUI. App Store ranked us in the top 50 for our category in week three after launch."
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Looking for a local iOS app development company? We have a US-based PM and iOS engineer in every market we list, with a Houston headquarters open since 2008.
Send us your idea and we'll send back a fixed-price quote, a week-by-week timeline, and a sample IP transfer clause — within 48 hours. Mutual NDA on request, no fee.
Pulled from real Reddit and Quora threads on iOS app development companies in the USA.
Hours per feature, US vs offshore rates, hidden costs.
Read guidePerformance, hiring, TCO, and Apple ecosystem access compared.
Read articlePrivacy Manifest, ATT, IAP, HIG — what we screen before submitting.
Read playbookWhat changed in 2025 and how to ship on-device AI features.
Read deep-diveDriving Change
Through Technology
