Swift, Kotlin, or a shared codebase? A practical framework for deciding how to build your mobile app — based on how we ship native iOS and Android products at FigTreeSoft.
Every mobile project starts with the same fork in the road: build natively for each platform, or share one codebase across both. There is no universally correct answer — only the right answer for your product, timeline, and team. Here is the framework we use at FigTreeSoft to make that call, drawn from shipping native iOS and Android apps for startups, SMEs, and enterprises.
What "native" actually buys you
Native development means building with each platform's first-party tools — Swift and SwiftUI on iOS, Kotlin and Jetpack Compose on Android. The payoff is access to everything the platform offers, the moment it ships, with performance and polish that are hard to match.
- Full access to platform capabilities — ARKit, HealthKit, CloudKit on iOS; ML Kit, foldables, and Wear OS on Android.
- Best-in-class performance, optimized for Apple silicon and the diverse Android device ecosystem.
- Interfaces that follow Apple's Human Interface Guidelines and Material Design, so apps feel right to users.
- Day-one support for new OS features and devices, instead of waiting on a framework to catch up.
When cross-platform is the smarter bet
A shared codebase is not a compromise — for the right product it is the correct engineering decision. If your app is largely content, forms, and standard flows, and you need to reach both platforms quickly with a lean team, a single codebase can cut time-to-market and maintenance cost significantly.
- Tight budget or timeline where reaching both platforms fast outweighs squeezing out maximum performance.
- Apps dominated by shared business logic rather than heavy device-specific features.
- Early-stage MVPs validating an idea before investing in two native teams.
A simple decision framework
Instead of arguing technology in the abstract, we score each project against four questions. The honest answers usually point clearly in one direction.
- Experience: does the product live or die on fluid, high-fidelity, platform-specific interactions?
- Capabilities: how much do you depend on cutting-edge hardware and OS features?
- Team & timeline: do you have the resources to maintain two native codebases well?
- Lifespan: is this a long-lived flagship product or a short-term experiment?
Our take
For flagship products where the mobile experience is the business — fintech, health, and anything that leans on the camera, sensors, or wearables — we default to native. The performance, reliability, and access to new platform features pay for themselves over the life of the product. For leaner, content-driven apps and early MVPs, a shared codebase can be exactly right. The goal is never to win a framework debate; it is to ship the product that best serves your users and your roadmap.
Not sure where your product lands? Our mobile team can walk through this framework with you and recommend an approach — and an App Store and Google Play launch plan to go with it.