The Ultimate EVM App Development Guide

Ethereum introduced the programmable blockchain — and with it, an entirely new category of application development. Since then, the ecosystem has expanded into a vast landscape of Layer 2s, sidechains, and specialised networks, all sharing the same underlying architecture: the Ethereum Virtual Machine (EVM). For developers, that means one toolkit can reach an enormous and interconnected user base.

Reown provides a comprehensive SDK for EVM app development, designed to help teams build across this multichain ecosystem without sacrificing performance, security, or user experience. Whether you are building a DeFi protocol on Ethereum, a game on an L2, or a marketplace across multiple EVM networks, Reown gives you the infrastructure to ship faster and scale further.

About EVM app development

The EVM is the most widely deployed smart contract execution environment in the world. Ethereum Mainnet remains the anchor, but the modern EVM landscape is primarily built around Layer 2 networks — Arbitrum, Base, Optimism, Polygon, and dozens more — which offer the security guarantees of Ethereum with significantly lower transaction costs and higher throughput.

This expansion has made EVM development more accessible and more capable at the same time. Developers can deploy a single Solidity contract and make it compatible with hundreds of EVM chains. Users who hold assets on one EVM network can interact with apps on another using the same wallet. The composability of the ecosystem — the ability for protocols to integrate directly with each other — has enabled entire categories of financial infrastructure to emerge that simply could not exist elsewhere.

Today, the EVM ecosystem hosts the largest concentration of active onchain users, liquidity, and developer tooling in the industry. For teams deciding where to build, it represents both the largest immediate addressable market and the most battle-tested execution environment available.

Why are tools for EVM app development important?

Compatibility and interoperability

The EVM ecosystem spans over 500 chains, each with its own configuration, RPC endpoints, and chain ID. Without dedicated tooling, ensuring compatibility across even a handful of these requires significant engineering overhead. A well-built SDK handles chain discovery, connection management, and wallet compatibility out of the box — so teams can focus on their product rather than protocol-level plumbing.

Performance

User expectations for onchain apps have converged with those for mainstream consumer software. Slow load times, failed transactions, or clunky wallet connections drive drop-off. The tools developers use need to be built for production-scale traffic, with reliable connection handling, transaction management, and real-time state updates across multiple chains simultaneously.

Security

The EVM ecosystem operates at significant financial scale, which makes it a consistent target for exploits. Developer tooling that powers wallet connections and transaction signing is part of that attack surface. Infrastructure that has been independently audited, penetration tested, and stress-tested in real-world deployments reduces the risk that a third-party dependency becomes a vulnerability in your own stack. Reown's security model is built around continuous review rather than point-in-time audits.

Compliance

Regulatory requirements for onchain applications are expanding across jurisdictions. For apps handling financial activity — swaps, lending, payments — knowing where your users are and meeting Travel Rule requirements is increasingly non-negotiable. Tooling that surfaces user geography and includes Travel Rule compliance by default removes a significant implementation burden and reduces the risk of building a product that cannot legally operate in key markets. See how the Travel Rule applies to onchain apps →

Analytics

Most EVM apps operate across multiple chains and support hundreds of compatible wallets. Without a unified analytics layer, product teams are working with incomplete data — unable to see which chains drive the most activity, which wallets are most common in their user base, or where users drop off during onboarding. Reown Analytics surfaces wallet distribution, chain distribution, country distribution, transaction volume, swap activity, onramp usage, and more from a single dashboard.

Learn more about Reown Analytics →

What can you build with Reown's EVM app development toolkit?

EVM DeFi apps

DeFi is the most active category in the EVM ecosystem, encompassing decentralised exchanges, lending and borrowing platforms, yield protocols, and synthetic asset systems. Morpho, a lending network built across Ethereum, Base, Unichain, and Katana, uses Reown to support all EVM networks from a single integration, enable users to fund directly from centralised exchange wallets like Binance or Coinbase without leaving the app, and maintain a consistent experience across mobile and desktop.

Read the Morpho case study →

Learn more about Reown for DeFi apps →

EVM decentralised social apps

The EVM ecosystem hosts a growing number of social applications — Zora, Mirror.xyz, and Farcaster among them. Orb, a social media platform built on Lens Protocol, used the Reown SDK in Flutter to ship a mobile-native app without building custom wallet connection logic for each framework. Reown's multi-framework support lets social app teams concentrate on product features rather than integration overhead.

Learn more about Reown for social apps →

EVM blockchain games

From trading card games to zero-knowledge RPGs and on-chain metaverses, EVM gaming is a broad and fast-moving category. Reown supports game development across Unity, iOS, Kotlin, and React Native, with features like gas sponsorship and intuitive login flows that are specifically useful in gaming contexts where friction during onboarding leads to abandonment. ZKNoid, a zero-knowledge gaming platform, used Reown to scale their onboarding by adding multiple login methods without disrupting the game experience.

Learn more about Reown for gaming →

EVM marketplaces

NFT marketplaces and onchain commerce platforms — including OpenSea and Blur — are a core part of the EVM ecosystem. Reown provides the tooling to make purchases, swaps, and onramps seamless within a marketplace context, with gas sponsorship and direct funding from centralised exchange wallets reducing the steps between a user arriving and completing a transaction.

Learn more about Reown for marketplaces →

How does Reown's EVM toolkit work?

The Reown SDK is built to support the full range of EVM-compatible chains from a single configuration. Any chain included in Viem's chain list is supported out of the box — which covers the vast majority of active EVM networks. Developers configure the chains they want to support, and the SDK handles wallet discovery, connection management, and transaction signing across all of them.

Beyond chain compatibility, the SDK includes:

How to build EVM-compatible blockchain apps with Reown

Getting started with Reown on EVM is straightforward. The SDK supports React, Next.js, Vue, JavaScript, React Native, Flutter, Android, iOS, and Unity — choose the framework your team is already working in and follow the setup guide.

Full EVM integration guide in the Reown docs →

Reown for EVM apps: Unlocking seamless compatibility

The EVM ecosystem offers access to the largest active user base in onchain development, a mature tooling ecosystem, and the composability that makes complex financial applications possible. Reown's SDK is built to make that ecosystem accessible without the overhead of managing compatibility, compliance, and analytics separately.

Whether you are building a DeFi protocol, a consumer app, a marketplace, or a game, the same SDK covers authentication, payments, security, and data — across every EVM chain your users connect from.

Get started in the Reown dashboard →

Further reading:

Reown for EVM apps FAQ

Which EVM chains does Reown support?

Reown supports any EVM-compatible chain included in Viem's chain list, which covers the vast majority of active EVM networks — including Ethereum Mainnet, Base, Arbitrum, Optimism, Polygon, and hundreds more. If your target chain is EVM-compatible and listed in Viem, it is supported.

Can I use Reown for non-EVM chains as well?

Yes. While this article focuses on EVM development, the Reown SDK also supports Solana, Bitcoin, and Tron. Teams building across EVM and non-EVM ecosystems can use a single Reown integration to cover all of them.

Does Reown support mobile and game engine frameworks?

Yes. The Reown SDK supports React Native, Flutter, iOS (Swift), Android (Kotlin), and Unity, in addition to web frameworks like React, Next.js, and Vue. Teams can build for any platform from a single SDK without maintaining separate wallet connection implementations per framework.

Is Reown free to use?

Reown offers a free tier to get started. For details on what is included and when paid plans apply, see the Reown pricing page.