iosApp Ideas for Swift + Ethereum https://medium.com/mercuryprotocol/introducing-web3-swift-for-ethereum-ios-development-1e02212b662b https://github.com/MercuryProtocol/web3.swift https://github.com/Boilertalk/Web3.swift https://github.com/gnosis/bivrost-swift https://github.com/gnosis/heimdall-ios https://stackoverflow.com/questions/49270413/how-to-connect-ethereum-smart-contract-with-ios-app?rq=1