Morning urine or afternoon?

Ladies I’m just after some advice. All the pregnancy tests say use the FMU to test but I’ve read on here that people are getting better results with their afternoon urine. I think I may be the same.

But then my question is, say I did a test this afternoon and then one tomorrow, would I not see a darker line tomorrow as more time has passed for HC to develop?

Has anyone got any advice on this or have you experienced it? Many thanks in advance.