Add your coin
With app integration we mean the ability to create and sign transactions for any target blockchain. Note that in order to support a blockchain there always first needs to be a server plugin
Wallet Core
Heat wallet comes with the wallet-core engine embedded. Wallet core comes with support for over 40 different blockchains so be sure to check if a protocol is supported by wallet core before developing support for it through one of the other integration methods.
NodeJs
Another engine embedded in Heat Wallet is the nodejs javascript engine, this means integrations can be written in Node/Js.