> For the complete documentation index, see [llms.txt](https://docs.langx.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.langx.io/docs/library.md).

# Library

- [Badges](https://docs.langx.io/docs/library/badges.md): The badges LangX gives for what you have done — streaks, corrections, messages, tokens earned and time as a member — and what they do and do not change.
- [Notifications](https://docs.langx.io/docs/library/notifications.md): What LangX sends you, when it sends it, and how to turn any of it off — per kind and per channel.
- [Calls](https://docs.langx.io/docs/library/calls.md): Voice and video calls with the people you chat with: how to call and answer, who can call you, how to turn calls off, and what keeps them private. In the web app now; in the iPhone and Android apps fr
- [Day Streaks](https://docs.langx.io/docs/library/day-streaks.md): How day streaks work, what keeps one alive, and how to rescue a day you missed.
- [LangX Copilot](https://docs.langx.io/docs/library/language-copilot.md): LangX Copilot, the AI helper in a chat: what it does, what it sends, and why it is a beta that may not be on for your account yet.
- [Getting Pro Free](https://docs.langx.io/docs/library/free-pro.md): Three ways to get Pro without paying — invite friends, keep a streak, or use a gift code — and what happens when free Pro ends.
- [Coming Back From the Old App](https://docs.langx.io/docs/library/coming-back.md): Had a LangX account before the new app? Your profile, username, streak and tokens are waiting — here is how to get back in.