Checking App Creators
You can check app creators in the app management screen.
Note that creators who can be checked vary depending on the type of user who checks them.
Users & System Administrators: They can check all the app creators except for the ones who created apps that belong to the Private app group.
kintone Administrator and other users: They can check creators of all apps that they have management permissions for.
To check the app creator, click the setting on the upper right side of the screen to open the "App Management" screen, and then check the "Created by" in the "Apps".