Le Gia Phung N.

My profile caught your eye because you need a React Native developer. Not native iOS, not Android, not Flutter. You have probably already done the math. One codebase instead of two. One team, not separate Swift and Kotlin hires. A product that ships to both stores at once. Half the cost, twice the speed. You are right. For most apps, and for almost every crypto app, that is the correct call.

Native is the heavyweight option. You write the app twice, once in Swift for iOS and once in Kotlin for Android. Two codebases, two skill sets, two sets of bugs. You get the best raw speed and the earliest access to new OS features. You also pay for all of it, in money and in time. Most apps never touch the ceiling native buys you.

Flutter gives you one codebase, written in Dart. It draws every pixel with its own engine, so the screens look sharp and animate well. The trouble starts at the edges. Crypto and Web3 live in JavaScript. Wallet libraries, chain SDKs, WalletConnect, all built for the web first. Flutter cannot call them directly. You write, test, and maintain extra bridge code for features a wallet needs on day one.

React Native gives you one codebase too, written in JavaScript and TypeScript. The difference is what it can reach. It runs the same libraries your web dApp already uses. The same ethers and viem for contracts. The same WalletConnect for signing. No bridge, no translation layer, no waiting. React Native shines wherever the logic is shared with the web. Most of all in a crypto app, where that logic is the product. Leading wallets like Rainbow and Coinbase Wallet run on React Native for this exact reason.

That reach is why I went React Native only. I spent years building crypto wallets and Web3 apps. The work kept pulling toward the same JavaScript tools. So I stopped splitting my focus. These days clients come to me for one thing. Wallets people can trust with their own keys. Self-custody, no seed phrase to lose, every transaction signed on the device. React Native is where that gets built, and it is what I build.

I also build other mobile apps than crypto. Some clients come to me for everyday consumer apps too. Social, fitness, lifestyle. Building those apps taught me one word. Monetize. So I built every piece around of it. RevenueCat for selling in-app purchases and subscriptions. Stripe for card payments. Firebase for push notifications that bring users back. I built nearby search with react-native-maps for Wizapp, a People Nearby social app. Crypto apps rarely need any of this. They earn on-chain, through tokens and trading fees. Consumer apps live on it.

A few of the apps I have shipped: