Mobile App Development Services for iOS and Android

What are mobile app development services?

Mobile app development services cover every step of creating an app for phones and tablets: strategy, UX and UI design, front-end and back-end code, integrations, testing, store submission and updates. A complete service also plans for what happens after launch, because operating systems change every year.

What we build

• iOS development: native iPhone and iPad apps in Swift.
• Android development: native Android apps in Kotlin.
• Cross-platform apps: one codebase for both platforms using React Native or Flutter.

Deliverables include platform strategy, mobile UX and UI design, the native or cross-platform build, back end and APIs, integrations such as payments, maps and notifications, analytics and crash monitoring, QA on real devices, store submission and maintenance.

Native, cross-platform or hybrid: which app type should you build?

Cross-platform suits most business apps because it delivers near-native quality from one codebase at lower cost. Choose native when the app needs top performance or deep device access. Choose hybrid or a PWA for simple, content-led apps and early MVPs.

DesignFXPro's default advice: build cross-platform unless your app needs native performance or device features. We would rather recommend the smaller build than upsell two codebases you do not need.

the difference between native and hybrid appsthe difference between native and hybrid apps

Who needs an app, and what are the warning signs?

A mobile app makes sense when customers use your product often, need it on the go or need phone features such as notifications, the camera or location. If people visit once or twice, a fast website usually serves them better.

• Customers log in to your website from their phones several times a week.
• You rely on reminders, bookings or order updates that work better as push notifications.
• Your team needs a field tool that works with the camera, GPS or offline.
• An existing app has poor reviews, crashes or has not been updated for new OS versions.
• You want to test a product idea with an MVP before a larger investment.

Apple's own App Store Review Guideline 4.2 says an app should go beyond a repackaged website, so an app needs a clear purpose of its own.

How does the DesignFXPro app development process work?

Every app project runs in five phases, and we often start with a lean first version so you learn from real users sooner. Each phase ends with a review before the next begins.

1. Discover and strategy: define goals, users and platform, then scope features, often starting with an MVP.
2. UX and UI design: create mobile-first flows and a prototype, and test them before coding, with our UI/UX design team.
3. Build: develop the app natively or cross-platform, plus the back end, databases and integrations.
4. QA and launch: test on real devices, then submit to the App Store and Google Play and manage review.
5. Maintain and grow: monitor crashes and usage, update for new OS versions and improve based on user behavior.

Before launch we run a device checklist covering installs, permissions, offline states and payments. Our mobile app testing checklist lists what we check.

What affects the cost and timeline of app development?

Feature complexity, platform choice, back-end needs and integrations drive both cost and timeline. DesignFXPro gives a fixed estimate before work begins and does not publish set prices.

For a step-by-step breakdown, see our guide to the mobile app development timeline.

To get a fixed app estimate from DesignFXPro, take these steps:

1. Write down who the app is for and the one or two jobs it must do on day one.
2. List the integrations you need, such as payments, maps, logins or an existing system.
3. Decide whether iOS, Android or both must launch first, based on where your customers are.
4. Book a free consultation to agree the platform, MVP scope and timeline.

Why choose DesignFXPro for app development?

DesignFXPro designs for retention, gives honest platform advice and keeps the whole build in one team. Many apps are deleted soon after install, and AppsFlyer's 2025 app uninstall report puts the 30-day Android uninstall rate at about 46% for 2024, so we plan onboarding, notifications and analytics from the first sprint.

• Honest advice on native versus cross-platform, based on what the app needs.
• Design, build, back end and store submission under one team.
• Post-launch support, including OS updates, crash monitoring and improvements.
• Matching websites and web apps through our web development service, on the same brand system.

Across all services, DesignFXPro has delivered 300+ projects for clients in 15+ countries. The same mobile-first discipline shows in our web work: for The Injury Justice Firm, mobile page load time fell from 7.2 seconds to 1.9 seconds. Results vary by product and market.

Which App Store and Google Play rules apply?

Both stores review apps against published rules, and failing them delays launch. We build to these requirements from the start.

• Completeness: Apple's Guideline 2.1 asks for final versions with working URLs, no placeholder content, on-device testing and demo account details if the app has a login.
• Privacy: Apple's Guideline 5.1.1 requires a privacy policy link in App Store Connect and inside the app, explaining what data is collected and how users can request deletion.
• Review times: Apple says App Review typically reviews at least 50% of submissions in under 24 hours and 90% in under 48 hours.
• Target API level: from August 31, 2026, new Google Play apps and updates must target Android 16 (API level 36) or higher, with exceptions for Wear OS, Android Automotive OS, Android TV and Android XR apps.