iOS App Development Company · New Delhi, India · Since 2010
iOS Apps Built byIndian Developers for the App Store.
ACSIUS Technologies is an iOS app development company building Swift and SwiftUI apps for iPhone, iPad, Watch and Vision — discovery, UI/UX, engineering, App Store review and post-launch iteration under one in-house team.
You get a named iOS lead, a TestFlight build on your own iPhone every week, and Swift source code in your repository from the first commit.
- 0+
- Years building software
- 0+
- iOS apps shipped
- 0+
- Designers & engineers
- 0wk
- Typical v1 build
Sign in with Apple
Build
TestFlight #31
Shipped this sprint
Crash-free
99.8% sessions
Gate: 99% minimum
Review
Approved · 1st pass
Under your Apple account
iOS App Development Services
Four tracks inside every iOS engagement.
Choose one to see the Swift stack, the Apple frameworks and what it buys you.
Swift + SwiftUI iPhone apps built to Apple's own guidelines.
iOS 16+
supported baseline
Our core practice. Declarative SwiftUI screens, Combine or async/await data flow, offline-first storage and motion that feels native rather than ported. Written against Apple's Human Interface Guidelines so App Store review is a formality, not a fight.
- Accessibility, Dynamic Type and VoiceOver from sprint one
- Dark mode, haptics and gesture polish included
- Widgets, App Clips, Live Activities and push done properly
Stack we use
Straight Answers
Platform, review, ownership.
Four decisions every iOS product owner has to make, answered without the sales layer.
Swift or cross-platform for an iOS-first product?
If iPhone is where your revenue and reputation live — heavy animation, Apple Pay subscriptions, HealthKit, ARKit, widgets, wearables or offline-first data — native Swift wins on performance, review safety and long-term maintenance. If you need Android on the same roadmap and the features are mostly UI, data and payments, we will say so and recommend React Native instead.
How does App Store review actually get handled?
We prepare the listing, screenshots, privacy manifest, data-collection declarations and review notes, then submit under your Apple Developer account and answer reviewer questions ourselves. Most of our submissions clear on the first pass because guideline checks happen during QA, not after.
Who owns the Swift code and the developer account?
You do. The Xcode project lives in your Git from the first commit, the app is published under your own Apple Developer account, and design files, certificates and provisioning move to your team on payment. Nothing is tied to ACSIUS for future work.
Can you take over an existing iOS app?
Regularly. We start with an architecture and dependency audit, then send a prioritised list of crashes, technical debt and quick wins with effort estimates. Work continues on a branch with CI so your live app keeps running while we stabilise it.
Ways To Engage
Three ways to start, one written scope.
iOS v1 sprint
Swift app with 4–6 core screens, one integration, analytics and TestFlight distribution. Built to be tested by real users, not to win an award.
- Best for
- Founders and new product bets
- Timeline
- 8–10 weeks
Full iOS product
iPhone and iPad, backend, admin dashboard, Apple Pay or StoreKit subscriptions, push, QA lab coverage and App Store launch under your account.
- Best for
- Funded startups and SMBs
- Timeline
- 4–6 months
Dedicated iOS pod
Hire iOS app developers in India as an embedded pod — engineers, designer and QA in your standups, sprints and repo, scaling month to month.
- Best for
- Enterprise and product teams
- Timeline
- From 1 month
How We Build
Idea to App Store listing in six phases.
Every phase ships something you can open, tap or install. No hidden gates.
- 01Week 1–2
Product & platform scope
Workshops on users, jobs-to-be-done and must-have vs later. You leave with a feature list, an iOS version baseline and a written phased scope.
Scope doc + roadmap
- 02Week 2–3
iOS UX prototype
Clickable prototype of the core journeys using native navigation patterns, tested with real iPhone users before a line of Swift is written.
Figma prototype
- 03Week 3–4
SwiftUI design system
Components, states, empty states, SF Symbols, Dynamic Type and motion specs — a system your future engineers can extend, not redraw.
Design system
- 04Week 4–11
Swift sprint engineering
Two-week sprints across app and backend, each closing with a TestFlight build you install on your own iPhone.
Weekly TestFlight builds
- 05Rolling
Device lab & guideline QA
Functional, performance, accessibility and App Review guideline passes on current and older iPhones and iPads, with agreed crash budgets.
Test + guideline report
- 06Launch +30d
App Store launch & growth
Listing, screenshots, privacy manifest, submission, reviewer replies, phased release, crash monitoring and 30 days of post-launch support.
Live on the App Store
Milestone invoicing, weekly TestFlight builds, and your repo from the first commit.
Need installs, not a website?
One landing page + Google Ads to drive App Store installs.
Plenty of app owners only need a single high-converting page: a place for Google Ads, Apple Search Ads and social traffic to land before the store button. We design, build and run it as a standalone package.
Single conversion page
One page — hero, proof, screenshots, FAQ and store buttons. Live in days, no CMS to learn.
Google Ads & Search Ads
Search, Performance Max, YouTube and Apple Search Ads structured around install intent keywords.
Tracking that survives iOS
GA4, Search Ads Attribution and SKAdNetwork-aware conversion events wired before spend starts.
Creative & A/B testing
Ad copy, banner sets and two hero variants tested weekly so cost per install keeps falling.
Typical 90-day movement
+2.4×
CTR
−38%
Cost per install
+31%
Store CVR
8–10
Quality Score
- One page, no CMS, live in days
- Google Ads + Apple Search Ads managed monthly
- Install and lead events tracked end to end
iOS Apps We Build
Sector-shaped iPhone apps, not a rebadged template.
Eight categories we have shipped repeatedly, each with its own architecture.
Subscription & content
StoreKit 2 tiers, trials, paywall tests and offline reading or viewing.
Fintech & wallets
Apple Pay, biometric unlock, ledgers, statements and audit-ready logs.
Health & fitness
HealthKit metrics, workout sessions, Watch companions and consent-first data.
Retail & D2C
Catalogue, Apple Pay checkout, loyalty passes and Shopify sync.
Booking & travel
Availability, itineraries, Wallet passes, maps and offline access.
Field & enterprise
Offline capture, roles, approvals, MDM distribution and Sign in with Apple.
AR & camera
ARKit placement, RealityKit scenes and Core ML on-device vision.
Social & community
Feeds, chat, moderation tooling, Live Activities and creator payouts.
How We Work
Delivery commitments, in numbers.
To a written scope
Feature list and phased plan
Sprint cadence
TestFlight build every sprint
Typical review outcome
Guideline checks inside QA
Timezone overlap
US, UK, EU, AU and Middle East
Crash-free gate
Release blocked above budget
Free post-launch support
After every go-live
Why ACSIUS
An iOS partner you can audit.
16+
Years
90+
iOS apps
30d
Support
<1%
Crash gate
App Store review handled
Listing, screenshots, privacy manifest, data declarations and reviewer replies are our job — submitted under your Apple Developer account.
Weekly TestFlight builds
From sprint two you install the real app on your own iPhone every week. Progress you can tap beats a status report you have to trust.
Real Apple device lab
Current and older iPhones and iPads, plus Watch, on throttled networks — because the simulator hides the bugs your users find.
Your repo, your account
Swift code in your Git from the first commit, certificates and provisioning handed over, no lock-in to us for version two.
Guideline QA, not guesswork
Human Interface Guidelines and App Review rules are checked during QA, so rejections don't become launch-week surprises.
We stay after launch
30 days of free post-launch support, then care plans covering iOS releases, SDK deprecations, crash triage and iteration sprints.
Send your idea and get a free iOS scope call.
No lock-in, no hidden phases, no demo theatre.
FAQs
iOS app development, answered.
Send us your idea, a competitor app or your existing Xcode project and we'll tell you what we would build and how long it takes.
Talk to an iOS LeadSixteen years of delivery, an in-house salaried team of 40+ designers and engineers in New Delhi, 90+ iOS apps live on the App Store, and a method built on weekly TestFlight builds instead of monthly slide decks. We publish under your Apple Developer account and hand over Swift source code, so our record has to stand on its own rather than on lock-in.
You get senior Swift and SwiftUI engineers with 4–5 hours of daily overlap with US, UK, EU and Middle East teams, at Indian delivery rates but with in-house accountability — no freelancer churn, no unnamed resources. Every engagement has a named iOS lead who joins your standups and owns the release.
Both, and we recommend the honest option. Native Swift and SwiftUI when the app leans on Apple frameworks — Apple Pay, StoreKit subscriptions, HealthKit, ARKit, widgets, Watch or heavy animation. React Native when iOS and Android must share one roadmap and the features are mostly UI, data and payments.
Discovery and UX take 2–3 weeks, a focused v1 build 8–10 weeks, and a full-feature iOS product 4–6 months including QA and App Store review. You install a TestFlight build every sprint from week four, so timelines are verified by working software rather than percentages.
Yes. We prepare the listing, screenshots, privacy manifest and data-collection declarations, then submit and manage review under your Apple Developer account and reply to reviewer questions. If you do not have an account yet, we walk your team through creating one, because ownership should stay with you.
Yes, and we architect for it early so it is not a rewrite. StoreKit 2 subscriptions with trials and upgrades, Apple Pay checkout, HealthKit metrics, ARKit scenes and Core ML on-device inference are all things we have shipped, together with the entitlements and privacy strings Apple requires.
Every project includes 30 days of free post-launch support. After that, care plans cover annual iOS releases, Xcode and SDK deprecations, App Store policy changes, crash triage and a monthly change report, with iteration sprints whenever you want new features.
Always, before any code or product detail changes hands. Access is least-privilege, credentials stay in your vault, and delivery can be aligned with HIPAA or GDPR requirements when your sector needs it.
Let's talk iOS
Ready to Ship Your iPhone App?
Tell us the idea, the audience and the deadline. Within two working days you get a platform recommendation, a phased scope and the iOS apps we shipped closest to yours.
Contact
Talk to the people who'll build it.
No sales script and no gatekeeping — your first call is with a strategist and an engineer. We reply to every enquiry within 4 business hours.
- Office
- 52-A, 301-3rd Floor,Krishna Complex, Hasanpur,New Delhi-110092, India
- Phone
- +91 98 9176 4802
- info@acsius.com
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