This is a fairly good explanation on stackexchange: https://ethereum.stackexchange.com/a/384 https://ethereum.stackexchange.com/a/384 Excerpt (in the context o

This is a fairly good explanation on stackexchange: https://ethereum.stackexchange.com/a/384 https://ethereum.stackexchange.com/a/384 Excerpt (in the context of Ethereum, a smart contract platform): > A DApp has its backend code running on a decentralized peer-to-peer network. Contrast this with an app where the backend code is running on centralized servers. > A DApp can have frontend code and user interfaces written in any language (just like an app) that can make calls to its backend. Furthermore, its frontend can be hosted on decentralized storage such as Swarm or IPFS. > If an app=frontend+server, since Ethereum contracts are code that runs on the global Ethereum decentralized peer-to-peer network, then: DApp = frontend + contracts