stack99 builds mobile apps and websites in Swift, Kotlin, Flutter, and Next.js — fast and polished.
What we build
Native iOS apps built with Swift and SwiftUI — fluid, fast, and fully integrated with the Apple ecosystem.
Native Android apps in Kotlin with Jetpack Compose — modern, performant, and platform-true.
One Flutter codebase for both iOS and Android — when speed of delivery matters without sacrificing quality.
Fast, modern websites and web apps built with Next.js and React — responsive, SEO-friendly, and production-ready.