A dApp (decentralized application) is a software application that runs on a blockchain network rather than on centralized servers controlled by a single company. dApps use smart contracts to execute their core logic, making them transparent, censorship-resistant, and often open-source.
While a traditional app like a banking platform stores data and processes transactions on company servers, a dApp performs these operations on a decentralized blockchain. This means no single entity has full control over the application.
dApps exist across many categories:
- DeFi — decentralized exchanges, lending platforms, and yield farming protocols
- Gaming — play-to-earn games with blockchain-based assets
- Social — decentralized social media and content platforms
- NFT marketplaces — platforms for buying and selling digital collectibles
- DAOs — governance platforms for community-managed organizations
To use most dApps, you need a crypto wallet like MetaMask that can connect to the blockchain. The wallet signs transactions and interacts with the dApp's smart contracts on your behalf.
dApps are built on Layer 1 and Layer 2 blockchains. Ethereum has the largest dApp ecosystem, but networks like Solana, Avalanche, and Arbitrum also host thousands of applications.
Before using any dApp, verify its smart contracts have been audited, check its TVL, and ensure you are connecting through the official website. Phishing sites that impersonate popular dApps are a common threat, so strong wallet security is essential.