This article explains the difference between Feishu Admin and Check In Admin in the Check In app.
Q: What is the difference between Feishu Admin and Check In Admin?
A: Check In Admin is for managing the Check In app specifically. You use it to configure the app settings, manage user access to check-in statistics, and export reports. Feishu Admin is for the general enterprise management of your organization, where you add or remove tenant users, adjust the organization structure, and get an overview of all installed apps.