iOS App Development Company for Swift and the App Store

iOS app development is building native apps for iPhone and iPad in Swift, and releasing them through the App Store. Syndell helps founders, product managers, and CTOs launch polished iOS apps that pass App Store review, and rescues apps that crash, stall in review, or feel out of place on iOS.

Tell Us About Your Project

Share a few details about what you want to build.

12+

Years of Experience

1539+

Projects Delivered

20+

Countries from 5 Continents

618+

Clients Served

Trusted by Industry Giants, Enterprises, and Startups

When Clients Call Us Urgently

If one of these sounds familiar, this is where we step in.

We start with an audit of the code, crash reports, and release setup, then give you a written plan.

Apple Rejected Your Build

Rejections come from privacy declarations, permissions, incomplete accounts, or crashes on review devices. We read the rejection, fix the cause, and resubmit. Every rejected build pushes back a launch or campaign.

The App Crashes After an iOS Update

New iOS versions change behavior. We reproduce the crash on the new version, fix the code, and add tests. Crashes after an update hit your most loyal users first.

The App Feels Foreign on iOS

Cross-platform screens that ignore iOS habits get poor reviews. We rebuild key screens with native navigation and gestures. Apps that feel native earn better ratings.

The Codebase Is Old Objective-C or UIKit Only

We move it to Swift and SwiftUI in stages, one screen at a time. That makes new features quicker and hiring easier.

iOS App Development Services

Six kinds of iOS application development we deliver, for iPhone and iPad.

Custom iOS Apps

Consumer and business apps in Swift and SwiftUI, built for iPhone and iPad.

API and Back-End Integration

Connect the app to REST or GraphQL services, Firebase, or your own back end, with offline handling.

Device and AI Features

Camera, location, push notifications, Apple Pay, Face ID, and Bluetooth, tested on real devices. On iOS 26 or later we can use Apple’s Foundation Models framework for on-device text features, or Core ML for custom models.

App Store Launch

Store listing, signing, TestFlight beta testing, and review-ready submission.

Migration and Modernization

Move Objective-C or UIKit code to Swift and SwiftUI in stages.

Testing, Maintenance, and Support

Crash monitoring, iOS-update fixes, and new features on a monthly retainer or on demand.

Need iOS Engineers in Your Own Team?

See Hire iOS Developers

Why Build a Native iOS App?

Best Platform Fit

Native code uses every iOS feature, animation, and system control the day Apple ships it.

Valuable Users

iPhone users are an important audience for many paid and subscription products.

A Polished, Consistent Feel

SwiftUI and Apple’s design guidelines give users interfaces they already know.

Apple's Tooling

Xcode, TestFlight, and App Store Connect support building, testing, and releasing.

SwiftUI vs UIKit

SwiftUI

UIKit

Approach

SwiftUI

Declarative, Describes the Screen

UIKit

Imperative, Builds the Screen Step by Step

Code Size

SwiftUI

Shorter

UIKit

Longer

Maturity

SwiftUI

Newer, Improving Each Year

UIKit

Long-Established, Feature-Complete

Best Fit

SwiftUI

New Apps and New Screens

UIKit

Older Apps and Highly Custom Interfaces

Working Together

SwiftUI

Can Be Mixed Inside UIKit Apps

UIKit

Can Host SwiftUI Screens

Building for both iPhone and Android from one codebase? See our Flutter page or React Native page.

Not Sure Whether Native iOS Fits Your Plan?

We will tell you plainly.

How an iOS App Gets Built

Scope and Device Targets

We define users, features, minimum iOS version, and devices.

Design for iOS

Screens follow Apple’s guidelines, with a clickable prototype you approve before build.

Build in Sprints

Each sprint ends with a TestFlight build you can install.

Test on Real Devices

Automated tests plus checks on a mix of iPhones and iPads, with performance profiling.

Release and Support

We prepare the App Store listing and submission, monitor crashes, and stay on for updates. Button: Book a Consultation Bring your app idea or existing code and we will map it to these steps.

Bring your app idea or existing code and we will map it to these steps.

Case Studies

Clutch Up

Esports / Fantasy Gaming

Esports tournaments move fast, and fans follow them from their phones, not a desk. The Clutch Up mobile app puts the fantasy format in their pocket, letting players draft rosters, follow live tournament scoring, and check how their picks are performing as matches unfold, from the first game to the final.

Mobile App DevelopmentPlayer DraftingLive Tournament DataPerformance-Based Scoring

Read Case Study

38%Increase in Contests Created

29%Increase in Active Weekly Users During Tournament Windows

41%Reduction in Data Lag

Holistic Wellcare Advisers

HealthTech / Wellness Marketplace

Wellness sessions rarely happen at a desk. The HWA mobile app brings the practitioner and client experience to a phone, letting clients browse packages and book at-home, virtual, or in-person sessions while practitioners manage availability, bookings, and package payments wherever their day takes them, between sessions or on the road.

Mobile App DevelopmentSession BookingPackage & Payment TrackingPractitioner & Client Experience

Read Case Study

100%CONFLICT-FREE BOOKING

24/7SELF-SERVE BOOKING, NO CALLS NEEDED

100%AUTO-SYNCED GOOGLE & OUTLOOK CALENDARS

Zoundslike

EdTech / AI Language Learning

Zoundslike does the hard part well – AI-powered, game-based English practice paired with live peer-to-peer speaking sessions. The platform wasn’t carrying its weight: core flows were incomplete and unstable, no mobile app existed yet, and unresolved audio issues undermined the entire speaking-practice experience on iOS.

Product UX/UIAI Feature DesignWeb App RebuildiOS + Android DevelopmentMarketing Website

Read Case Study

125k+DOWNLOADS

24k+ACTIVE USERS

100k+GAMES PLAYED

Industries We Build iOS Apps For

Why Choose Syndell as Your iOS App Development Company

99%

Clients Recommendation

12+

Industries Served

1539+

Projects Delivered

618+

Happy Clients

✓

Full Lifecycle iOS App Development

✓

Agile & CI/CD Delivery

✓

Established Development Team

✓

Verified Client Reviews

✓

Flexible Engagement Models

✓

Security & Confidentiality

What Our Clients Say About Us

Syndell has demonstrated excellent problem-solving skills, quickly addressing any issues that arise. The team is responsive and attentive to the client’s needs, and internal stakeholders are impressed with the service provider’s value-driven approach.

Nicole Powell

Owner, Branding Marketing Firm

The partnership with Syndell has provided the client with consistent good traffic for several years. Despite the time differences, the vendor has stayed responsive and is easily accessible via Skype, email, and other outlets. Their timely and helpful approach is commendable.

Jared White

Owner & Marketer, JBZ Beats Inc.

Thanks to Syndell’s efforts, the client started to get more leads. The client was very happy and excited about the results. Syndell provided exceptional communication and support throughout the engagement. The client described the whole process as easy.

Allan Brown

Principal, Resumes by Allan Brown

Thanks to Syndell’s efforts, the client received positive reviews and increased traction on their website. The team was professional, timely, and responsive to the client’s needs. They also provided valuable recommendations that facilitated the client’s decision-making process.

Raunak Shah

Business Owner, GenNext Learning

Syndell delivered all four milestones on time, ensuring the project progressed as planned. Their team demonstrated their expertise, managed the project efficiently, and answered questions promptly. They also communicated effectively through virtual meetings.

Buck Mclnnis

CEO, Tampa Bay Steel Corp

Syndell successfully delivered a fully functional platform. They excellently utilized Slack and Skype for all feedback and requests. Above all, their speed and responsiveness were the highlights of the engagement.

Tobi Lawson

Co-Founder, Praiki Technologies Ltd

Syndell continues to satisfy end clients with their excellent development work. Leading a straightforward and efficient workflow, the team follows directions well and collaborates closely with the client. Their attention to detail and excellent customer support are highlights.

Jay Thakker

President, Imprografix, LLC

Syndell has delivered an excellent product that matches the client’s requirements. They have been highly responsive and flexible in meeting tight deadlines. They’re an approachable team that offers quality services.

Paul Smith

Managing Director, Viva Digital

The client was very satisfied with the end product, describing it as amazing and reasonably priced. Syndell impressed with their strong project management and communication skills, which helped them ensure a seamless customer experience.

Pawel Tugeman

CEO, Lazy Rida Beats

I’ve been thoroughly impressed with the expertise of Syndell. Their support is exceptional. They’ve swiftly addressed any issues that arise. I’ve already experienced great results with their SEO and website development, and I’m looking forward to exploring their mobile app development and AI development services soon. I highly recommend them to anyone looking for reliable and innovative solutions!

Nicole Powell

Owner at HALCON

We have worked with Syndell Technologies for nearly 10 years as our outsourced partner and found their team to be reliable, available, prompt with a broad range of expertise.

Paul Smith

Owner of Viva Digital

Syndell has been a tremendous asset to our tax consulting firm. They built a modern, professional website tailored to our clientele and also developed a secure, custom software system for managing client records and compliance workflows. The team is technically strong, responsive, and easy to communicate with. We’ve already seen time-saving improvements internally. Highly recommend them to any professional service business needing a digital upgrade.

Garima Bhandari

Partner at G N Financial Services

Excellent service, quick response to changes and editing the website, professional service that is hard to find these days.

Zohany Pulido

Owner, QPI, Inc

Fantastic experience with Hiren building our website. He was very skilled and creative and fast. I will definitely work with him again! I’d give him 10 stars if possible.

Candace Pendleton

Owner, Commodities University

Engagement Models and Pricing

Model

Best For

Billing

Scope Changes

Fixed Price Model

Best For

A First Release with a Fixed Feature List

Billing

By Milestone

Scope Changes

Change Request

Time and Material Model

Best For

An App That Evolves with User Feedback

Billing

Monthly, by Hours Worked

Scope Changes

Reprioritized Each Sprint

Dedicated Team Model

Best For

A Long Roadmap Across iOS and Android

Billing

Monthly, per Developer

Scope Changes

Directed by You Daily

Every app is scoped individually. Share your budget range on the call and we will show what it covers, then send an itemized proposal.

Recognitions That Reflect Our Commitment

Our expertise has been consistently acknowledged by global platforms and independent reviewers. From mobile app excellence to AI innovation, we’ve earned the trust of leading industry authorities and certification bodies.

App Software Developers 2026

App Development Companies 2026

Top Artificial Intelligence Company 2026

App Development Companies 2026

Top Web Developers 2026

Recognised As A Great Place To Work

Most Reviewed Blockchain Company 2026

ISO 27001 Certified

Top Web Design Company 2026

Top App Development Company 2026

Top Mobile App Development Company 2026

Top Mobile App Development Companies 2026

Top Software Developers 2026

Top Mobile App Developers 2022

Top App Development Company 2026

Top Mobile App Development Company 2026

Top IT Services India 2022

Working Across Time Zones? That's Fine.

We provide our services in the countries below, and we plan our hours around yours.

USA · UK · UAE · Canada · Australia · India

Areas We Serve →

FAQs

How Much Does iOS App Development Cost?

Cost depends on the number of screens and features, back-end and API work, design depth, device features, integrations, and testing. We quote a fixed price for defined scopes and monthly rates for evolving ones. Share your requirements and we will send an itemized proposal.

How Long Does an iOS App Take to Build?

It depends on screens, integrations, device features, and how many iOS versions and devices you support. We give a timeline after scoping and split it into milestones, so you see working builds each sprint. A focused first release ships sooner than a full product.

How Will We Follow Progress If Your Team Is in Another Time Zone?

We agree overlap hours at kickoff and report through Slack, email, and video calls. After each sprint you get a TestFlight build to install on your own iPhone, so you can judge progress by using the app. Syndell has offices in Middletown, Delaware, Manchester, UK, and Ahmedabad, India.

Do We Need Our Own Mac or Apple Accounts to Get an iOS App Built?

No Mac is needed on your side. Native iOS builds require Apple’s Xcode, which runs on macOS, so we build and test on Macs. You do need an Apple Developer account, and companies usually need a D-U-N-S number to enrol. We prepare the listing under your account, so you own the app.

Should We Build Native iOS or Use Flutter or React Native?

Choose native iOS for the best platform fit and newest Apple features. Choose Flutter or React Native to share one codebase with Android. We build in all three and recommend after reviewing your features and roadmap. See our Flutter and React Native pages.

How Do You Get an App Through App Store Review?

We follow Apple’s guidelines from design onward, complete privacy declarations, test on current iOS versions, and provide review notes and demo accounts. Reviews can still ask for changes. If Apple rejects a build, we read the notice, fix the cause, and resubmit.

Can You Add AI Features to an iOS App?

Yes, when the product needs them. On iOS 26 or later, Apple’s Foundation Models framework lets an app use the on-device model behind Apple Intelligence, but only on compatible devices with Apple Intelligence turned on. We plan a fallback for other devices, and use Core ML or cloud AI when a task needs more.

Our Blogs

3 Min Read

October 15, 2026

Software

Is Offshore Software Development Safe? What Buyers Must Get Right

Offshore software development is safe with verified vendors, full IP assignment and milestone payments. See the real risks and the safeguards that neutralize them.

Mansi Ramlavat

4 Min Read

October 15, 2026

Software

SaaS Product Development for Legal Tech Startups: A Complete Guide

A buyer's guide to SaaS product development for legal tech startups: workflow validation, security review, multi-tenant architecture and choosing a partner.

Hitesh Bhoi

4 Min Read

October 15, 2026

Software

Custom Software Development for Accounting Firms: A Complete Guide

A buyer's guide to custom software development for accounting firms: build-vs-buy, client data security, first releases, and comparing partners.

Arch Sheth

Tell Us What Your iOS App Needs to Do.

Share your idea or your existing app. We will review it first and tell you whether to build, fix, or modernize. Want proof first? Browse our case studies.