The bot, as indicated in the topic, allows you to find out what chats the user is (or was) in.
In addition, the bot allows you to find chats in which the audience is similar to the audience of the original chat.
Unfortunately, few things in this world are given for free, and using a bot also costs money.
But the money is relatively small - one effective request costs $0.1.
You can replenish your account in the bot through USDT (trc20).

Some statistics:
Users in the database - 552M
Chats - 4159K
Data is updated daily.

Hope the bot is helpful.

https://t.me/ChatFinderRobot