You can make smartphone applications with Ethereum support in three ways:
- Using a DApp browser.
- Using Android or the iOS library.
- Doing everything in JavaScript, from key generation to key security and everything in-between. However, this is not recommended, as this makes you very vulnerable.
One kind of DApp browser is Toshi. It will allow you to make use of the centralized application, and you can use it in pretty much the same way in which you would use MetaMask, but on a mobile. Another more popular option isStatus.IM. It's actually a secure chat, but it's also a chat bot. You can give it commands such as retrieving the browser location, as shown in the following screenshot, and if you give it such commands, then you can trigger functions inside of the smart contracts:
Status.IM home page
A few applications have been developed using this method. One such application is WhoPays. This a contract-based bot that creates groups in which...