mySMS is not available for iPhone but there are plenty of alternatives with similar functionality. The best iPhone alternative is WhatsApp, which is free. If that doesn't suit you, our users have ranked more than 25 alternatives to mySMS and many of them are available for iPhone so hopefully you can find a suitable replacement. Other interesting iPhone alternatives to mySMS are Hangouts (Free), Zulip (Free Personal, Open Source), WeChat (Freemium) and Sesame Chat (Free Personal).
Fully open source instant messaging server and clients. No proprietary components or non-free dependencies. Backend in pure Go (GPL 3.0), with a command-line administration tool in python + gRPC. Clients for Android, iPhone, and Web - ReactJS (all licensed under Apache 2.0).
SafeSwiss The world’s most effective end to end encryption security solution including P2P Voice, encrypted email, encrypted storage, ephemeral text chat, docs share & group chat for mobile phone devices and PC's.
Mi Airit a chat app that helps you communicate messages to the right people without receiving unwanted responses or reactions. It is suitable for associations, organizations, companies, schools, communities and even individuals.