Google Calendar Bot

Google Calendar Bot is a thin, focused Telegram front-end for a calendar you already have: it connects to your Google account and lets you add, view and manage events from a chat instead of switching to the Calendar app. The pitch is speed — for a quick "book Thursday 3pm" you do not need to unlock your phone, find the app and tap through screens; you just message the bot.

Because it depends on the Google Calendar API and an OAuth connection to your Google account, it needs that one-time authorization step before it does anything, and its usefulness is capped by whatever Google Calendar itself already lets you do — it is a faster way in, not a replacement calendar. There is no group-sharing layer of its own; sharing still happens through Google Calendar's native sharing settings. It is best thought of as a shortcut for people who already live in Telegram all day and want one fewer app switch, not as a reason to move your calendar off Google in the first place.