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. Features:

Multiple servers with network presets Auto-completion for nicknames and commands Dark mode variant of the user interface Theme support for chat views Touch ID and passcode protected access 3D Touch support to peek and pop into chats and links Configurable scrollback buffer size IRC text formatting supporting bold, italic, underline, and colours Shows images inline (including animated GIFs) Split-screen Multitasking for the iPad Built in commands with support for user-defined aliases Notification overlay with tappable actions (e.g. connect, join channel, etc) Highlight on specific keywords or phrases Highlights easily accessible by tapping on the "Networks" title Swipe gestures to easily traverse networks and chats Shake gesture to clear message counts for chats Ignore users (someone getting on your nerves?) Manage channel modes and properties Send Photo from Photo Library or Camera iCloud synchronisation of settings Execute commands on connection Supports ZNC 1.6 or later Supports Push Notifications via Mutter Push ZNC module Simple Authentication and Security Layer (SASL) Lag indicator and auto reconnect German localisation IRCv3 compliant