Mobile Apps
iOS App Development Company
RedZen is an iOS app development company that builds native iPhone and iPad apps in Swift and ships them through Apple review — something we have done for four of our own apps on the App Store. Cost and delivery date are agreed before work begins.
Four apps on the App Store
Aether, Tafaseer, CaliTrack and Managable are RedZen iOS apps live on Apple’s store.
Native Swift
Built with Apple’s own tools for performance, battery and device features.
Fixed price
Cost and delivery date agreed before we start — never hourly.
Why iOS projects stall
A build that runs in the simulator but stutters or drains battery on a real iPhone.
An App Store rejection no one on the team knows how to resolve.
A developer who has never actually shipped through Apple review learning on your project.
A prototype that cannot be extended into the real product you need.
A team that has taken four of its own apps through App Store review builds yours in native Swift, tuned on real devices and shipped cleanly — so review is routine, not a gamble.
What you get
Native Swift
Built with the platform’s own tools for the best performance, battery behaviour and access to device features.
Backends & APIs
We design the server side too, or connect cleanly to one you already have.
Offline support
Sensible caching and sync so the app stays useful without a perfect connection.
Device features
Notifications, camera, location, in-app purchases and more, integrated where they add value.
Performance
Profiled for launch time, smooth frames and low memory use on real devices, not just simulators.
App Store ready
We handle the build, signing and submission — routine for us, having shipped four of our own apps through review.
- A native iOS app built in Swift
- The backend or API integration it needs
- TestFlight builds for review
- Source code and the App Store submission
How we work
Define
We agree the core feature set for a first release that is worth shipping but not bloated.
Build
Development in testable increments with builds you can run on your own device.
Test
TestFlight builds for real-world feedback before anything reaches the public.
Ship
Submission, review handling and launch.
Getting through App Store review
App Store review is where many iOS projects lose weeks — a rejection over a guideline, a privacy label, or a metadata detail that the team did not anticipate. Because RedZen has shipped Aether, Tafaseer, CaliTrack and Managable through Apple review, the process is familiar: TestFlight distribution, store listing, privacy declarations and the common rejection reasons are handled up front rather than discovered late.
We manage builds, signing, submission and any review back-and-forth, so launch is our problem to solve, not yours.
Hire iOS developers
If you need to hire iOS developers rather than recruit and manage them, RedZen is the alternative: a senior team that covers Swift, the backend, design and the App Store launch on one fixed-price agreement.
You get iPhone and iPad expertise that has already shipped real apps, without the cost and risk of building a team from scratch — and you own the code.
Common questions
What does an iOS app cost?
It depends on scope, so we give a fixed price after a short scoping conversation — the cost and delivery date are agreed before any work begins, and we never bill hourly.
How long does an iOS app take to build?
A focused first version is far faster than a full build. We give a firm timeline once the scope is agreed.
Do you handle App Store submission?
Yes — builds, signing, the store listing and the review process end to end. We have shipped four of our own apps through Apple review.
Swift or React Native?
For demanding iOS apps we recommend native Swift. If you need iOS and Android on a tighter budget, cross-platform can make sense — we talk through the trade-offs honestly rather than defaulting.
Do I own the code?
Yes. The source code and the App Store listing are yours, with no lock-in to us.
Can you take over an existing iOS app?
Often yes, after a short code review to understand its state and what it needs.
Do you build for iPad as well as iPhone?
Yes — native apps for iPhone and iPad, universal where that fits the product.
Do you do the design too?
Yes — we can design the app or build from designs you already have.
iOS App Development Company
Tell us what you need and we will come back within one business day with a clear, honest next step — no obligation.