This client features a modern Material design as well as many other awesome features:
– Stays in background properly, even on more recent Android versions
– Store chat messages to be displayed after reconnecting to the server later
– Nick/channel/command autocomplete
– Ignore list
– mIRC color formatting support
– SSL certificate exception list
– Command list to run after connecting
– Customization: custom command aliases, notification rules, reconnection interval, chat font, message format, app colors
…and much more!

Please note that this client is not finished yet and may be missing some features – if you find something missing, feel free to suggest those features to me!

This client is fully open-source as well and the source is available on GitHub: https://github.com/MCMrARM/revolution-irc