Native Swift and SwiftUI, or Flutter and React Native when one codebase makes more sense. Designed for how iPhone users expect apps to work, with App Store submission handled.
The full build, handled by one team so design, code and backend stay in step.
App projects usually go wrong in the same places. These are the rules we build to.
Five stages, with working builds for you to try along the way.
What building an iPhone app involves, native versus cross-platform, getting through App Store review, and what happens after launch.
An iOS app is more than screens and code. A typical project covers working out exactly what the app needs to do, designing how it works and looks on iPhone and iPad, building the app itself, building or connecting the backend that stores data and handles accounts, testing across devices and iOS versions, getting through Apple's App Store review, and then maintaining the app as Apple releases a new iOS version every year.
Most of the problems that derail app projects start in the first stage, not the coding. Features that were never clearly defined, assumptions about how users will behave, and underestimated backend work are the usual causes of budget and timeline overruns. That's why every project we take on starts with a scoping phase that produces a clear feature list, user flows and an honest estimate before development begins.
There are two main ways to build an iPhone app. Native development uses Apple's own language and frameworks, Swift and SwiftUI, and produces an app built specifically for iOS. Cross-platform frameworks like Flutter and React Native let one codebase run on both iOS and Android, which can reduce cost and time when you need both platforms.
Native is usually the better choice when the app depends heavily on iOS features — Apple Pay, HealthKit, advanced camera or AR, Apple Watch extensions, widgets — when performance and smoothness are central to the product, or when iOS is the main platform for your users. Cross-platform often makes more sense for apps that need both platforms quickly on a tighter budget, and whose features are mostly standard: accounts, content, forms, payments and notifications. We build both, and recommend the approach based on what your app actually needs rather than defaulting to one.
iPhone users have clear expectations about how apps behave: how navigation works, how gestures feel, where buttons sit, how text scales for accessibility. Apple's Human Interface Guidelines describe these conventions, and apps that follow them feel familiar and easy to use from the first launch. Apps that ignore them often feel slightly wrong in ways users notice even if they can't describe why.
Good app design also accounts for real conditions: slow or dropped connections, different screen sizes from compact iPhones to large iPads, dark mode, larger text settings and VoiceOver for visually impaired users. Designing for these from the start is much cheaper than fixing them after launch.
Most apps need a backend: servers and databases that handle user accounts, store data, send notifications, process payments and connect to other systems. It's frequently the largest part of an app project, and the part most often underestimated in early quotes. An app that looks simple on the screen can require significant backend work behind it.
Options range from managed services like Firebase, which speed up development for many apps, to custom backends built for specific needs, integrations or scale. The right choice depends on the app's data, security requirements and expected growth. Security matters here from day one: user data encrypted in transit and at rest, secure login, and compliance with privacy rules in the markets where the app will be used.
Every iOS app and update is reviewed by Apple before it appears in the App Store, and rejections are common for first-time submissions. Typical reasons include crashes or bugs found during review, incomplete information, privacy issues such as missing explanations of why the app needs certain permissions, login problems for reviewers, and in-app purchase rules for digital goods and subscriptions.
Most rejections are avoidable with preparation: a complete privacy policy and accurate privacy details, clear permission prompts, a working demo account for the reviewer, and following Apple's rules on payments. We prepare submissions against the App Store Review Guidelines and handle any back-and-forth with Apple, so launch dates aren't derailed by avoidable rejections.
An app that works perfectly on the developer's own iPhone can still fail on older models, smaller screens, older iOS versions or poor network connections. Testing covers functionality, performance, different devices and iOS versions, and real-world conditions such as switching between Wi-Fi and mobile data or receiving a call mid-task.
Apple's TestFlight lets clients and a group of real users try the app before public launch, which is one of the most valuable steps in a project. Feedback from real people using the app in their own lives catches problems that planned testing misses.
Launch is the beginning of an app's life, not the end of the project. Apple releases a major iOS update every year, and apps need testing and often updating to keep working properly and to meet new App Store requirements. Crash reports and user feedback in the first weeks usually point to fixes and improvements worth making quickly.
Budgeting for ongoing maintenance from the start avoids an app that slowly breaks as iOS moves on. Every build we deliver includes a post-launch bug-fix period, with ongoing maintenance and feature updates available as a separate plan if you want them.
App cost depends mainly on the number and complexity of features, the backend required, integrations with other systems, design complexity, and whether you need iOS only or both platforms. A focused first version with core features can typically be built in a few months; complex apps with extensive backend work take longer.
The most effective way to control cost is to launch a focused first version with the features that matter most, learn from real users, and add more based on what they actually use. Trying to build every possible feature before launch is the most common reason app projects run over budget and launch late.
Tell us what the app needs to do and we'll give you an honest range and the right tech stack.
Get a Free AuditNo credit card · Results in 24 hours