Is this opk positive?

[elmo01]

This is darkest Line I've ever had on an Opk. Usually is just a line you can barely see, it's still lighter than the control line so should I just assume it's negative? App says ovulation day is today

Forgot to attach pic

Here is one in comparison to yesterday's

I'd say no, but it's getting stronger so keep going! It needs to be the same colour or darker than the control line.

Thanks for replying, I'll do another one in the morning hopefully will be darker surely something must be happening for it to get darker x

Today's one, I'd say that's almost the same put out of opks now.. haha oops

But*