What is a single comparator?

[AMark.2]

Here is the datasheet :

TS881 - Rail-to-rail 0.9V nanopower, push-pull single comparator - STMicroelectronics

Does it mean I can use it in single power supply with VS- connected to GND?

[Uwe Bonnes]

Yes.

An you can compare voltages near the supply rails (Rail-to-rail )

[AMark.2]

Oh, thank you so much​.