How to build Bitcoin Apps with Reown
Bitcoin is no longer just digital gold. Over the past several years, a growing ecosystem of Layer 2 networks — including Rootstock and Stacks — has transformed Bitcoin into a serious platform for building applications. With the world's largest crypto user base, a battle-tested security model, and an accelerating DeFi ecosystem, the opportunity for developers building on Bitcoin has never been more tangible.
Reown's toolkit gives developers everything they need to build on Bitcoin and its Layer 2 networks — from wallet connections and authentication to payments, compliance, and analytics — without starting from scratch.
About Bitcoin App Development
For most of its history, Bitcoin's role in the developer ecosystem was narrow: exchanges, custody products, and the occasional payment integration. The network wasn't designed for programmable applications, and for a long time, it didn't need to be.
That changed with the rise of Bitcoin Layer 2 networks. Rootstock brought EVM compatibility to Bitcoin, enabling the full range of smart contract applications — DeFi protocols, lending platforms, yield vaults — to be built on a Bitcoin-secured chain. Stacks introduced its own Layer 2 with a purpose-built execution environment for Bitcoin-native apps. Together, these networks have expanded what's possible far beyond simple value transfer.
Since 2024, Bitcoin DeFi has been growing exponentially. Lending, borrowing, and yield platforms are live on Bitcoin L2s, and developer interest continues to accelerate. As the oldest and most battle-tested network in crypto — over 15 years and counting — Bitcoin brings a user base and a reputation that no other chain can match.
Why Are Tools for Bitcoin App Development Important?
Compatibility and Interoperability
Bitcoin is not natively compatible with EVM tooling. Building Bitcoin-compatible apps means navigating different address formats, signing standards, and wallet connection interfaces across Bitcoin mainnet, Rootstock, and Stacks. The Reown SDK abstracts away this complexity through a unified API that handles wallet connection and blockchain interaction across all three environments — and allows you to support EVM and Solana users in the same app via multichain configuration.
Performance
Reown's Blockchain API is optimised for the frontend requirements of the SDK, operating as a high-performance transport layer that supports both HTTP and WebSocket RPCs. It centralises requests for identity, history, and balances through a single service to offer near-instant data delivery — regardless of which chain your users are on.
Learn more about the Reown Blockchain API.
Security
Reown's infrastructure has undergone multiple rounds of third-party security audits, penetration testing, and threat modelling. For developers building on a network whose foundational value proposition is security, that track record matters.
View Reown's security information.
Compliance
Compliance requirements apply across all blockchain networks, and Bitcoin is no exception. Reown's authentication method, SIWX, has built-in Travel Rule compliance built in, so apps can meet regulatory requirements from day one. Reown Analytics also provides geographic data on your users, giving you the confidence to build the right compliance features for your market.
Read more about the Travel Rule and how Reown handles it.
Analytics
Understanding user behaviour in a Bitcoin app is difficult without dedicated tooling. Reown Analytics provides data across address activity, signature volume, swap and onramp usage, wallet distribution, and geographic spread — all from a single dashboard. For Bitcoin apps that also support Rootstock, EVM, or Solana users, the same analytics cover all chains in one place.
What Can You Build with Reown's Bitcoin App Development Toolkit?
Bitcoin DeFi Apps
Rootstock's EVM compatibility makes it the natural home for Bitcoin DeFi. Using the Reown SDK alongside EVM adapters, developers can build decentralised exchanges, lending protocols, yield platforms, and synthetic asset products — all secured by Bitcoin's proof-of-work network. Since 2024, Bitcoin yield has been one of the fastest-growing categories in the space, opening real opportunities for developers building here.
Bitcoin Governance Platforms
Bitcoin's community is large, decentralised, and deeply invested in permissionless coordination. Layer 2 networks like Rootstock are increasingly home to DAOs and governance platforms targeting this audience. Rootstock Collective, a DAO built on the Rootstock network, used Reown to simplify onboarding for its governance platform — enabling users to connect with familiar wallets and cast votes without friction.
Bitcoin-Native Apps
For developers building directly on Bitcoin mainnet — wallets, portfolio trackers, payment tools, or exchange integrations — the Reown SDK provides wallet connection, transaction signing, balance queries, and message signing through a unified API. Supported frameworks include React, Next.js, Vue, JavaScript, and React Native.
How Does Reown's Bitcoin Toolkit Work?
Building Bitcoin-Native Apps
The Reown SDK includes the @reown/appkit-adapter-bitcoin package, which enables Bitcoin wallet connections and blockchain interactions through a unified API. For React Native specifically, install @reown/appkit-bitcoin-react-native and initialise the BitcoinAdapter.
Once initialised, the following methods are available:
- sendTransfer — send Bitcoin transactions
- getAccountAddresses — retrieve wallet addresses
- signPSBT — sign Partially Signed Bitcoin Transactions
- signMessage — sign arbitrary messages
The SDK connects through WBIPs and the Bitcoin Wallet Standard. Currently supported extension wallets include Xverse, OKX, Leather, and Phantom, with the list expanding as additional wallets adopt these standards.
Learn more about Bitcoin RPC methods in the Reown docs.
Building Apps on Rootstock
Rootstock is an EVM-compatible Bitcoin sidechain, so Rootstock applications use Reown's standard EVM adapters — either Wagmi or Ethers. The SDK includes two pre-configured Rootstock networks: rootstock (mainnet) and rootstockTestnet. Because Rootstock is EVM-compatible, it unlocks the full range of EVM operations, including standard transactions, smart contract interactions, and the complete feature set of the Reown SDK.
Building Apps on Stacks
Stacks is a Bitcoin Layer 2 with its own non-EVM execution environment, so it requires the chain-agnostic adapter from the Reown SDK. Stacks network identifiers are exported from the networks package:
- Stacks Mainnet: stacks:1
- Stacks Testnet: stacks:2147483648
The Stacks integration supports wallet connection, account management, and RPC method calls via the request() method pattern. Note that some advanced features — including swaps, onramps, social and email logins, pre-built modals, and smart accounts — are not currently available on the Stacks integration. Reown authentication (SIWX) is supported.
How to Build Bitcoin-Compatible Apps with Reown
Building a Bitcoin app with Reown starts with choosing your target environment — Bitcoin mainnet, Rootstock, or Stacks — then selecting a supported framework and integrating the relevant adapter.
Supported frameworks for Bitcoin-native apps are React, Next.js, Vue, JavaScript, and React Native. Rootstock apps use any EVM-compatible framework. Stacks apps use the chain-agnostic adapter.
For a complete walkthrough — including framework-specific installation steps, wallet session configuration, and network setup — visit the Reown Bitcoin docs.
Reown for Bitcoin Apps: Unlocking New Paradigms
Bitcoin's evolution from a store of value into a platform for programmable applications is still early. For developers who move now, the opportunity is significant: the largest user base in crypto, a growing Layer 2 ecosystem, and a DeFi space that has barely scratched the surface of what's possible.
With Reown, building a Bitcoin app is possible whether you're targeting Bitcoin mainnet, Rootstock's DeFi ecosystem, or Stacks' governance and consumer app landscape. The toolkit covers the full stack — wallet connection, authentication, payments, compliance, and analytics — so you can ship a production-ready app without stitching together disparate services.
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Reown for Bitcoin Apps: FAQ
What wallets does Reown support for Bitcoin apps?
Reown currently supports Xverse, OKX, Leather, and Phantom for Bitcoin-native apps via their extension interfaces. The list of supported wallets is expanding as additional wallets implement WBIPs and the Bitcoin Wallet Standard.
Can I build multichain apps that support both Bitcoin and EVM chains?
Yes. You can configure a single Reown integration to handle Bitcoin mainnet, Rootstock (EVM-compatible), and any other EVM chain in the same app. Authentication (SIWX), analytics, and wallet management all work across chain namespaces within the same session.
Is Rootstock the same as Bitcoin?
Rootstock is an EVM-compatible sidechain that is merge-mined with Bitcoin, meaning it shares Bitcoin's proof-of-work security. It is not Bitcoin mainnet — it is a separate chain that uses its own native asset (RBTC, a 1:1 peg of BTC) and supports EVM smart contracts. Reown supports both Rootstock and Bitcoin mainnet independently.
What are the limitations of building on Stacks with Reown?
Stacks apps built with Reown support wallet connection, account management, and RPC requests. Advanced features including swaps, onramps, social and email logins, pre-built modals, and smart accounts are not currently available on the Stacks integration.
Does Reown handle compliance for Bitcoin apps?
Yes. SIWX — Reown's multichain authentication method — has Travel Rule compliance built in. Reown Analytics also provides geographic distribution data to support compliance decisions for your specific market. Read more about Travel Rule compliance in Reown.
What frameworks can I use to build a Bitcoin app with Reown?
For Bitcoin-native apps, the Reown SDK supports React, Next.js, Vue, JavaScript, and React Native. For Rootstock apps, you can use any EVM-compatible framework (Wagmi or Ethers). Stacks apps require the chain-agnostic adapter.