we build apps
people
use
Apps built for retention, performance and growth, for clients around the world.
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What We Build
iOS Apps
Native Swift apps that make full use of the platform, with App Store optimisation.
Android Apps
Native Kotlin apps built for the full range of Android devices, following Material Design, with Play Store optimisation.
Cross-Platform
One React Native or Flutter codebase for iOS and Android, which is quicker to change and cheaper to maintain.
AI-Powered Apps
Machine learning and natural-language features built on current AI models.
App Maintenance & Growth
Ongoing support, performance work, new features and scaling as your user numbers grow.
Progressive Web Apps
Web apps that work offline, install on home screens, and deliver app-like experiences across all devices.
Apps we've shipped
The same team that will build your app has taken products from idea to the App Store and Google Play.
See everything we've shipped
Beauty, grooming and wellness bookings across South Africa. Customers book in a few taps, businesses get a live calendar and Paystack payments.
Sign, fill and OCR PDFs entirely in the browser, then route them to several signers in order with timestamps and an audit trail. Mobile apps on the way.
Why Zulu Code
Built for Retention
We measure success by daily active users and engagement rather than downloads, and design and optimise for that.
Production-Ready Code
Every project gets automated tests, CI/CD pipelines and code review, and follows SOLID principles.
Clients Around the World
We are based in Boksburg and build apps for startups and established businesses in South Africa and internationally.
Our Process
Discovery
Market research, user interviews, competitor analysis and a technical feasibility check, all before any code is written.
Prototype
Interactive wireframes and design systems. We validate ideas with users and stakeholders before writing production code.
Build & Test
Two-week sprints with continuous integration and automated tests. You see regular demos, and we adjust based on your feedback.
Launch & Grow
Beta testing, App Store and Google Play submission and launch-day support, followed by analytics, user feedback and a roadmap for what comes next.
FAQs
It depends on scope. A simple MVP takes 8–12 weeks and a full production app 4–6 months. We work in 2-week sprints, so you see progress every fortnight and can change course based on user feedback.
iOS + Android is ideal for maximum reach. If budget-constrained, iOS typically has higher engagement and monetization. Android reaches more users. We recommend a phased approach: launch iOS first, then Android with cross-platform tools like React Native or Flutter.
Yes. Retainer-based support covers bug fixes, OS updates, performance work and new features.
We specialize in React Native, Flutter, Swift, Kotlin, TypeScript, Node.js, Firebase, GraphQL, and AWS. We choose tech based on your requirements: native for peak performance, cross-platform for speed and cost, and progressive web apps for browser-first experiences.
Code reviews, unit tests, integration tests, E2E testing, and staged rollouts. We use CI/CD pipelines to catch bugs early. Beta testing with real users before App Store / Play Store launch. Continuous monitoring post-launch for crashes and performance.
Start Your App Project
Ask for a quote or a technical consultation, or just tell us about your idea.
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