Flutter for iOS & Android
A shared codebase for products that need to reach both platforms. Interfaces, account flows, and backend connections are built around a consistent experience on phones and tablets.
Mobile App Development · TopGuy
Mobile apps made for everyday use.
I’m Rehan Hamayun, a mobile app developer based in Islamabad, Pakistan. Through TopGuy, I help businesses worldwide design and launch iOS and Android apps, from the first screens to app store submission.
Discuss your projectBuilt around your business
A good app starts with a clear reason for someone to come back. We define the core tasks, map the screens, and build the smallest useful release before expanding it. The choice between Flutter and a native build depends on the devices, integrations, and platform features your product needs.
What we can build
Native iOS features
Swift development when the product depends on Apple-specific capabilities. DopaMind is one example: its screen-time features use native system APIs rather than a self-reported timer.
Connected app features
Accounts, databases, notifications, payments, and subscriptions can be included in the agreed scope. We work through the important states, including slow connections, empty screens, and failed payments.
Testing & store submission
Device testing, release preparation, store metadata, and submission support. Store review feedback is handled as part of the launch process; approval remains with Apple and Google.
Where we start
Bring the problem you want to solve, the people who will use the app, and your essential launch features. Tell me whether you need iOS, Android, or both, and whether there is an existing backend or design to work with.
Budget & timeline
Mobile app projects start at $3,999. An app or SaaS MVP typically takes 4–8 weeks depending on scope. Your quote sets the milestones, integrations, support window, and launch responsibilities before development begins.
Explore project pricingSelected work
DopaMind — Screen Time
A screen-time app that actually sticks — DopaMind gradually lowers your daily limit, blocks distracting apps when you hit it, and keeps you motivated with streaks and milestones.
Más Cafecito Coffee
A coffee shop companion app for Más Cafecito — browse categories and menu items, decide what you crave, and walk in already knowing your order.
Pinga — Chat Now
A lifestyle social app for sharing real experiences — topic-based feeds, smart matching, photo editing and realtime chat, backed by a coins-and-subscription economy.
Before we get started
Should my app use Flutter or native development?
Flutter can suit a product with similar features on iOS and Android. Native development can be appropriate when a core feature depends heavily on one platform’s APIs. We make that choice after reviewing the requirements.
Can you take over an existing app?
Yes. I start by reviewing the existing codebase, designs, and release setup. That review helps define which parts can stay and which need changes before a new release.