10M+
Downloads
As an iOS app development company, our combined experience has resulted in a staggering 10 million+ downloads.
iOS App Development Company
- iPhone
- iPad
- Apple Watch
- Apple TV
- Vision Pro
Frame Sixty is a US-based iOS app development company building native apps for
iPhone, iPad, Apple Watch, Apple TV and Apple Vision Pro.
iPhone, iPad, Apple Watch, Apple TV and Apple Vision Pro.
We work in Swift and SwiftUI across the whole lifecycle — product strategy, UX design, engineering, QA and App Store submission. Our team has shipped 100+ apps with more than 10 million downloads, holds seven published technology patents, and has been building on Apple platforms for over a decade. Whether you need contract developers alongside an in-house team, someone to take over an existing app, or a product built from an idea, we cover it.
iOS App Development Services
We build native iPhone apps in Swift and SwiftUI, tuned for the devices your customers actually carry. Development targets the current SDK — iOS 26, Xcode and the Liquid Glass design system — and we are already building with the Apple Intelligence features arriving in iOS 27. Interfaces are resolved in Figma before engineering starts, and every build goes out through TestFlight ahead of App Store review.
iPad is its own discipline: a bigger canvas, multitasking, Apple Pencil and Stage Manager. As an iPad app development company we build for that surface directly instead of stretching an iPhone layout — split views, keyboard and trackpad support, and pointer interactions. It suits education, field work, creative tools and any workflow where the extra screen changes what the app can do.
watchOS apps live or die on glanceability. We build Apple Watch apps in SwiftUI with complications, notifications and HealthKit or workout integration where it fits, keeping the on-wrist interaction to a few seconds. Most share a codebase with their iPhone app, so the Watch experience ships as part of the product rather than a separate project.
tvOS is a ten-foot interface: focus-driven navigation, no touch and a remote in someone’s hand. We build Apple TV apps in SwiftUI around the focus engine, with video playback and AirPlay handled properly and layouts drawn for living-room viewing distance. Streaming catalogues, training content and digital signage are the workloads we see most.
Apple Vision Pro is a shipping platform and we have built for it since launch. Our team works in visionOS with SwiftUI, RealityKit and Unity to build spatial apps — windows, volumes and fully immersive scenes — alongside the AR and VR work the same team has done for a decade. See our Apple Vision Pro development, including apps featured by Apple and at WWDC.
Key stats
A decade of shipped Apple work behind every project: apps in production worldwide, downloads in the millions, and patented engineering in augmented reality and machine learning.
100+
Apps developed
We have successfully developed over 100 iOS and Android apps, distributed across the world and supporting several languages.
10+
Years on Apple platforms
We have been designing and developing apps for Apple devices for over a decade, through every major iOS release.
7
Patents owned
We hold seven published technology patents in augmented reality and machine learning.
Award-Winning Apple Developers
A decade of work on Apple platforms has been recognised by Apple itself, at WWDC, and by the XR industry. These are the credentials behind the team that will build your app.
Vision Hacks Winner
Featured on Apps for Apple Vision Pro
Unity Certified Professional Artist
Featured at WWDC
Our iOS App Development Process
User experience
User Experience (UX) design for a mobile app is a holistic process that centers on creating a seamless and satisfying journey for users. It begins with in-depth research into user needs and behaviors. This informs the creation of intuitive wireframes and prototypes, allowing us to test and refine the app’s functionality and flow. Through multiple iterations, user feedback is incorporated to enhance navigation and interactions. Visual elements are designed to align with the app’s purpose and user expectations. The final result is an app that not only meets user needs but also delights them, ensuring a positive and memorable experience that fosters engagement and loyalty.
iOS App design
The process of User Interface (UI) design for a mobile app is a meticulous journey. It begins with the integration of your company’s branding and style guidelines, ensuring a cohesive and recognizable visual identity. Through several rounds of creative design and valuable feedback loops, we refine every element, ensuring it resonates with your target audience. This iterative approach guarantees that the app’s look and feel align perfectly with your vision. The result is a polished and remarkable app that not only meets your users’ needs but also elevates your brand, setting it apart from competitors in the competitive app landscape.
Alongside the visual work we design the interaction itself: navigation that stays obvious as the app grows, states and empty screens that are drawn rather than improvised, and layouts that hold up on every screen size from iPhone SE to iPad Pro. User testing finds the pain points before they ship, and the design system we hand over keeps later features consistent with the ones we built.
iOS App development
Developing a mobile app is a multi-faceted process that encompasses various stages. It all begins with ideation, where the concept is fleshed out and refined. Next, the technical architecture is outlined, choosing the right technologies and platforms. The development phase involves coding, integrating features, and ensuring seamless functionality. Rigorous testing follows, identifying and resolving any glitches or issues. Once perfected, the app is polished with User Interface (UI) and User Experience (UX) design, enhancing its aesthetics and usability. After thorough quality checks, the app is prepared for launch, which includes submitting it to app stores, marketing, and finally releasing it to the eager users.
Our iOS Development Stack
We work across the full Apple toolchain — Swift 6, SwiftUI, Xcode, TestFlight and App Store Connect — plus ARKit and RealityKit when an app needs spatial or augmented reality features.
Reviews from our clients
Client happiness has been our top priority for over a decade. We listen intently to clients and their customers, assume nothing, and fearlessly create innovative solutions. Relentless dedication ensures the perfect outcome.
Gabe CostaLogitechFrame Sixty was a great partner in supporting our Apple Vision Pro initiative. Their mixed reality team brought strong technical expertise and a clear understanding of the Apple ecosystem. They were friendly, committed, and easy to work with throughout the process. Most importantly, they delivered on time and met our expectations, making the collaboration smooth and efficient from start to finish.
Stephen RuizSMR ConsultingThey handled everything incredibly well.
Frame Sixty, LLC helped the client engage influencers and brick-and-mortar retailers. They ensured agile project management and completed the beta version on time and within budget, exceeding the client’s expectations. Frame Sixty, LLC’s flexibility and resourcefulness were hallmarks of their work.
Nick AlfieriBlitz Media, LLCThey work with an incredible urgency, getting tasks done with a great turnaround and creative problem-solving that saves us time and money.
Frame Sixty, LLC has successfully improved the app with luxury features and enhanced its speed and overall UI/UX. The team ensures a transparent workflow by working efficiently and providing valuable insights and guidance. Their keen understanding of the client’s vision and goals stands out.
Justin HosekHosek EnterprisesFrame Sixty far exceeded my expectations on design. They also went above and beyond to add some features that were not in our original scope but were discovered as needed during the build.
They always delivered on time or early. They were available night and day for any needs I might have had.
All of the staff are intelligent with great attitudes, which makes the entire process quick, easy and enjoyable.
Dave M.The Image ResolutionFrame Sixty was instrumental in transforming my vision of an XR 3D movie streaming app into reality, guiding me through every stage of the process. With deep expertise in AR/VR development, they supported everything from initial ideation to design and Unity development, ultimately achieving a successful launch on the Meta Oculus Store. The synergy of their spatial design skills and the technical depth of their senior Unity engineers made for a collaboration that was both professional and personable. Their commitment and industry knowledge were key in bringing my project to life.
Walter MarquezWalter Marquez MiamiFrame Sixty was instrumental in swiftly developing my responsive WordPress website. Their meticulous approach to detail and support in account creation and configuration ensured a seamless website launch.
This exceptional team, led by experienced senior developers and project managers, not only displayed technical proficiency but also guided me through content creation for each page. Regular communication facilitated timely delivery of the website. I’m excited to collaborate with Frame Sixty in the future.
JustiniRobotIn the 20 years that I have been developing technical products, this was the very first time that a developer successfully deployed code to an IoT device that worked the very first time without any bugs or prior testing.
iOS App Development FAQs
Common questions about building an iOS app with Frame Sixty — what it costs, how long it takes, how native Swift compares to cross-platform, and what happens after launch.
The cost of an iOS app depends on scope: a single-flow MVP is a different budget from a multi-role product with backend integrations and a release cadence. Project work is quoted as a fixed bid after a discovery call, so the full cost is clear before development begins. A 30-minute call produces an accurate range for your idea.
A focused iOS app typically takes three to four months from kickoff to App Store; larger products with backends and multiple user roles run six months or more. Design and engineering overlap rather than running end to end, and we ship a working TestFlight build every one to two weeks so progress stays visible.
Build native Swift when performance, platform features or long-term maintainability matter — camera work, ARKit, HealthKit, widgets and background processing all behave better natively. Cross-platform earns its place when the same straightforward app has to ship on iOS and Android at once. We build both and will tell you which one your project actually needs.
Yes — a SwiftUI codebase targets iPhone and iPad together. We design the iPad layout deliberately rather than stretching the phone screen: split views, keyboard and trackpad support, and Apple Pencil where it fits. That costs a fraction of building a second app while still giving iPad users an interface built for the larger canvas.
Yes — App Store Connect setup, provisioning, privacy nutrition labels, screenshots and the review process are part of every build we deliver. We have submitted hundreds of apps and know which rejections are common, so the metadata and build settings are prepared to avoid them and keep your launch date.
Most clients keep us on for post-launch work: the annual iOS release each September, crash and analytics monitoring, and the next round of features. Apple deprecates APIs as it ships, so an app with no maintenance plan degrades on a predictable schedule. Support is scoped monthly or per release, whichever suits you.
Yes, and it is a common request. We start with a code and architecture review, then give you an honest read: what is salvageable, what needs rewriting, and what each path costs. We take over Swift and Objective-C codebases as well as React Native and Flutter projects.
Yes — Frame Sixty signs NDAs before you share anything sensitive, and you own the app and its full Swift source code once development is complete. The source ships with documentation any future iOS developer can pick up, so you are never locked into working with us.
We have shipped 100+ apps with more than 10 million downloads, hold seven published technology patents, and have built on Apple platforms for over a decade — including work featured by Apple and at WWDC. You work directly with the engineers building your app rather than through an account layer. Web, mobile and AR sit in one team, so a project that also needs a custom web application does not need a second agency.
Get in touch
We’re interested to see how we can help. Send us a message and we will get back to you within 24 hours.