RAG vs Fine-Tuning: Choosing the Right LLM Approach for Your Product
Both RAG and fine-tuning improve LLM performance on your specific use case — but they solve different problems. Here's how to choose.
React Native$18K – $45K
React Native Development
iOS and Android from one codebase — without sacrificing performance
10–14w
Typical timeline
2 stores
iOS + Android submission
1 codebase
Both platforms
Native perf
New Architecture
THE CHALLENGE
Sound familiar?
- You need iOS and Android but can't afford two native teams
- Your React Native app feels slow and janky compared to native
- Your existing React Native codebase is Expo-free and hard to maintain
- You've heard React Native is bad for performance but need to ship fast
- You need AI features but don't know how to integrate them in React Native
OUR APPROACH
How we solve it
We build React Native apps with Expo, TypeScript, Reanimated, and AI integrations that feel native — not like a web app wrapped in a shell. One codebase, both stores, no performance shortcuts.
What you receive
- React Native app (iOS + Android) built with Expo and TypeScript
- Shared component library with platform-specific adaptations
- AI feature integration (TFLite, OpenAI, or Anthropic)
- Both App Store and Play Store submission packages
- EAS Build and EAS Submit CI/CD pipeline
- Unit and component test coverage
- Documentation and Figma design files
OUTCOMES
What you walk away with
01
Single codebase shipped to both App Store and Play Store
02
Performance that passes for native on both platforms
03
AI features that work reliably on iOS and Android
04
Shared component library reduces ongoing maintenance cost
05
Both store submissions handled end-to-end
OUR DIFFERENCE
Why React Native from Virinchi
New Architecture by default
All React Native builds use JSI, Fabric, and TurboModules — the architecture that eliminates the bridge bottleneck.
Both stores included
App Store and Play Store submission, compliance review, and staged rollout are included in every React Native engagement.
Domain-specific expertise
We've shipped React Native apps for FinTech, HealthTech, eCommerce, and Industrial clients across four markets.
HOW IT WORKS
Our delivery process
01
Design Sprint
Platform-adaptive UI, component library, navigation architecture, and AI feature UX for both iOS and Android.
02
Foundation Build
Expo setup, TypeScript config, navigation, auth, and core screens with shared state management.
03
Feature Development
Product screens, AI integrations, API connections, and platform-specific adaptations.
04
Performance Pass
Reanimated animations, FlatList optimization, bundle size reduction, and device testing matrix.
05
Dual Store Release
EAS Build submission to both App Store and Play Store with staged rollout.
Is this right for you?
Best suited for
- Startups that need iOS and Android without doubling the budget
- Products with shared logic across platforms and similar UX requirements
- Teams with React/TypeScript engineers who want to build mobile
- Founders who've been told React Native can't perform — and want proof otherwise
Not the right fit for
- Products requiring deep native hardware access (custom Bluetooth protocols, AR sensors)
- Teams with existing native codebases that only need augmentation
- Projects where iOS and Android have fundamentally different UX requirements
Engineering Stack
Built with the tools that matter
38 production-grade technologies — every one battle-tested in shipped products.
INVESTMENT
Engagement & pricing
$18K – $45K
10–14 weeks
- Both App Store and Play Store submissions included
- EAS Build CI/CD pipeline setup included
- Platform-specific optimizations included as standard, not extra
Ready to start?
Get a detailed proposal within 48 hours. No commitment required.
Frequently Asked Questions
Didn't find what you were searching for? Reach out to us at [email protected] and we'll assist you promptly.
For most app categories — yes. The new React Native architecture (JSI, Fabric, TurboModules) eliminates the bridge bottleneck. Apps using Reanimated for animations are indistinguishable from native to most users.
We default to Expo managed workflow for most projects — faster builds, better tooling, and easier OTA updates. For projects needing native module customization, we use Expo with custom native modules.
For standard features — camera, GPS, push notifications, biometrics, Bluetooth LE — yes. For deep custom hardware access, native is a better fit. We tell you which applies to your project during scoping.
FROM OUR CLIENTS
Built with teams who ship
The team took our AI concept from whiteboard to production in 10 weeks. The architecture they designed handles 10x our expected load with no issues.
Insights
From our engineering blog
A collection of detailed case studies showcasing our design process, problem-solving approach,and the impact of our user-focused solutions.
MLOps Patterns for Financial Services: What's Different
Standard MLOps practices need significant adaptation for regulated financial environments. Model explainability, audit trails, and compliance workflows change everything.
AI Product Strategy in 2025: What the Leaders Get Right
The companies that win with AI don't have better models — they have better product strategy. An analysis of what separates AI-first companies from the rest.
Validating Clinical AI: What FDA SaMD Guidance Means for Your Product
The FDA's AI/ML-based Software as a Medical Device framework has real implications for how you build, test, and document your clinical AI system.
Building Recommendation Systems That Actually Convert
Most product recommendation engines underperform because they optimize for click-through rather than purchase intent. Here's the architecture that changes that.
ALSO IN MOBILE & WEB PLATFORMS
Other Mobile & Web Platforms services
iOS App Development
Swift, SwiftUI, and AI-powered iOS apps built for the App Store
Learn moreAndroid App Development
Kotlin, Jetpack Compose, and AI-integrated Android apps for the Play Store
Learn moreWeb Application Development
Next.js web applications that score 95+ on Lighthouse
Learn moreUI/UX Design & Prototyping
User research, wireframes, design systems, and AI UX patterns
Learn moreProgressive Web Apps
Installable, offline-capable web apps with native-like experience
Learn moreGlobal Presence
One Studio. Four Markets.
Our engineering team is based in New Delhi. We work with clients across India, USA, UK, and UAE — async-first, with structured weekly delivery sessions in your time zone.
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