IRCCloud is described as 'IRC client with a future. Stay connected, chat from anywhere, and never miss a message' and is an app in the Social & Communications category. There are more than 50 alternatives to IRCCloud for a variety of platforms, including Windows, Linux, Online / Web-based, Mac and Self-Hosted solutions. The best alternative is HexChat, which is both free and Open Source. Other great apps like IRCCloud are Ripcord (Free Personal), mIRC (Paid), Quassel IRC (Free, Open Source) and XChat for Linux (Free, Open Source).
Mutter is a free and easy-to-use IRC client optimised for the iPhone and iPad. It allows you to connect to thousands of IRC networks all over the world, and chat to people about any topic you can think of.