App Development
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Native iOS, Android, and cross-platform apps built for real users — from concept and design through to launch, iteration, and ongoing support.
Sijzi designs and builds mobile applications for iOS, Android, and cross-platform targets — from consumer-facing products to internal business tools and B2B platforms. We work across the full build: product thinking, UX, engineering, QA, release, and the iteration that follows launch.
We build native apps in Swift and Kotlin when platform-specific performance and access to device hardware matters, and cross-platform apps in React Native or Flutter when speed, budget, and team flexibility are the priority. The choice depends on your product's requirements, not our preference.
Every app we build is designed around real user behaviour — with clean architecture, reliable API integration, secure data handling, and a codebase structured to support the features that come after version one. We stay involved through the App Store and Google Play submission process, and can support ongoing releases after launch.
Native iPhone and iPad apps built in Swift — with full access to iOS APIs, device hardware, Apple frameworks (SwiftUI, UIKit), and compliance with App Store guidelines from day one.
Native Android apps built in Kotlin — covering the full Android ecosystem, Material Design, Google Play requirements, and hardware integration across a wide range of devices.
React Native and Flutter apps that share a single codebase across iOS and Android — delivering near-native performance with faster build cycles and lower maintenance overhead.
We connect your app to REST or GraphQL APIs, third-party services (Stripe, Firebase, Google Maps, push notifications), and custom backends — with proper authentication, error handling, and offline support.
We design the full app experience — user flows, wireframes, and high-fidelity screens in Figma — before development starts, so the interface is validated before a line of code is written.
We handle the full submission process for both the Apple App Store and Google Play — including metadata, screenshots, review compliance, TestFlight/beta distribution, and resolving rejection issues.
We run a structured kickoff to map your app concept — target users, core features, platform requirements, technical constraints, and success metrics. The output is a clear product spec before any design or development starts.
We design the full user experience — flows, wireframes, and high-fidelity screens in Figma. Interactive prototypes are tested before development begins, so we're building the right thing from the first sprint.
We choose the right stack for your app's requirements, set up the project structure, configure development environments, establish coding standards, and connect backend services and APIs before feature development begins.
We build in focused sprints with regular demos, daily stand-ups, and continuous integration. Each feature goes through functional testing, device testing, and performance checks before it's merged into the main codebase.
We distribute the app through TestFlight and Google Play internal testing, resolve any review compliance issues, prepare all store metadata and assets, and manage the full submission process for both platforms.
We monitor the live app through crash reporting and analytics, address post-launch issues rapidly, and work with you on the next release cycle — whether that's a minor update or a significant new feature set.
Tell us about your idea. Our engineers, designers and AI strategists will map a clear path from concept to launch — usually within a single discovery call.