I personally use libera.chat because it’s the most active IRC server out there. is there any other active servers? I found this website to search for different IRC servers https://netsplit.de/networks/
you can make an account there however you can also use it without an account.
Here are 5 android client: AndroIRC: This is a popular IRC client for Android with a clean and user-friendly interface. It supports multiple servers, SSL connections, and various customization options.
Revolution IRC Client: Revolution IRC is another feature-rich IRC client for Android. It offers support for multiple servers, customizable themes, and various features like notifications and chat logging.
Yaaic (Yet Another Android IRC Client): Yaaic is a free, open-source IRC client for Android. It provides a clean and intuitive interface and supports features like multiple servers, SSL connections, and customizable themes.
HoloIRC: HoloIRC is known for its sleek and modern interface. It supports multiple servers, SSL connections, and features like notifications and chat logging.
AndChat: AndChat is a popular IRC client with a wide range of features, including multiple server connections, SSL support, customizable themes, and more.