A dApp (Decentralized Application) is a decentralized application that operates on a blockchain and smart contracts, rather than on centralized servers of a single company.
Unlike traditional applications (Web2), a dApp does not have a single owner or point of control: the logic, data, and transactions are distributed among the nodes of the blockchain network.
Key characteristics of dApp
1. Decentralization
Business logic is stored in smart contracts
Contracts deployed on the blockchain (Ethereum, BNB Chain, Solana, etc.)
No central server or administrator that can unilaterally change the rules
2. Transparency and verifiability
Smart contract code is usually open
All transactions are recorded on the blockchain
Any user can verify transactions and logic
3. Absence of intermediaries
User interacts directly with the protocol
No banks, payment systems, or centralized operators
Settlements occur peer-to-peer
4. Self-custody
User owns the assets themselves
dApp does not hold client funds
Access is done through a Web3 wallet (MetaMask, OKX Wallet, Trust Wallet, etc.)
How dApp works (simplified)
User accesses the interface (Web or Mobile)
Connects Web3 wallet
Signs the transaction with their private key
Smart contract executes action on the blockchain
The result is recorded in a distributed ledger
Important: even if the dApp interface goes down, the smart contracts continue to exist on the blockchain.
Main components of dApp
Component
Description
Frontend
Web interface (React, Vue, etc.)
Smart Contracts
Application logic on the blockchain
Blockchain
Network (Ethereum, Solana, Polygon, etc.)
Wallet
Authentication and signing of transactions
Oracles
External data (prices, rates, events)
Types of dApp applications
DeFi (decentralized finance)
DEX (Uniswap, PancakeSwap)
Lending and loans (Aave, Compound)
Staking and farming
NFT and GameFi
NFT marketplaces
Play-to-Earn and GameFi projects
Metaverses
DAO
Decentralized governance
Voting by token holders
Management of protocols and funds
Infrastructure dApps
Cross-chain bridges
Oracles
Decentralized data storage
Differences between dApp and regular applications
Criterion
Web2 application
dApp
Control
Company
Smart contract
Data storage
Centralized
Blockchain
Trust
Required
Minimized
Censorship
Possible
Practically nonexistent
Asset ownership
Platform
User
Advantages of dApp
Financial freedom
Censorship resistance
Transparent rules
Global access
Automation through smart contracts
Limitations and risks
Errors in smart contract code
Network fees (gas fee)
Difficulty for beginners
Regulatory uncertainty
Responsibility lies entirely with the user
