DApp is a decentralized application, where the frontend app, wallet, smart contract, and blockchain network all connect and work together. Instead of email/password, users can log in or sign using their wallet.
Visual Flow
Frontend UIConnect WalletUser SignsSmart ContractBlockchain StateUI Updates
On-chain data is a public record stored on the blockchain, and it can come with a cost. Off-chain data can live on a server, database, or IPFS, and is typically used for speed, privacy, and cost reasons. A DApp needs to carefully design the balance between on-chain and off-chain data.
You should see
A DApp is more than just a website — it's an app architecture that combines a wallet, a smart contract, and network state.