The same hum kids account can be used to log into multiple devices. The hum kids by Colgate app is compatible with iPhone, iPad, and iPod touch, as well as most of the Android devices.
However, we recommend that you use one device to track your game progress and rewards.
With the current version of the hum kids by Colgate app, the game progress and rewards do not synchronize in real time. Therefore, if you use the same hum kids account to log in on different devices, the game progress and rewards may be different. We are doing our best to fix this behavior in later app updates.