This is the mobile app based on
ionic framework: ionicframework.com Angular2: https://angular.io/ Cordova: https://cordova.apache.org
To commnunicate with Ethereum network the app uses these libraries: https://github.com/ethereum/web3.js https://github.com/ethjs https://github.com/trufflesuite/truffle-hdwallet-provider
See corresponding Ethereum code in turnsy-truffle project: https://bitbucket.org/grishick/turnsy-truffle