Isopod? Help with ID please

[0utworld]

Noticed this guy stuck on my glass, was not and still is not moving at all. Does anyone have an idea what this may be?

Thanks!

 

[Softhammer]

Chiton if flexible, if the top is a single shell then it’s a limpet. Both harmless.

 

[0utworld]

Chiton if flexible, if the top is a single shell then it’s a limpet. Both harmless.

Thanks! It definitely looks more like a Chiton.