Help reading opk

[Cupcakesandlove]

Hi
I’m I meeting if anyone could
Help, we have been trying for our second since jan... unsuccessfully. this month I decided to buy opk and I got the treat and ease clear response. I tested two days and ago and there wasn’t a second line. I tested again today and there is a faint line.
I’m finding the instructions hard to read, they both say a line indicates ovulation within 24/48 hours. Or have I missed something?
My last period was the 17th and I have a regular 25 day cycle. According to fertility friend which we have been using since January I should ovulate on Friday... but based on the test I just took ovulation should happen on or around Tuesday?
Has anyone used this app and it be majorly off like this? Or has anyone used the opk and it be rubbish?
I’m due a blood test on Tuesday to see if I actually ovulate or not as we haven’t fallen pregnant. But I’m starting to think if the app is that off then that’s the reason as I’ve missed it by nearly a week?

Thank you for your help.

Just realised that it says I haven’t or I am not likely to ovulate in the next 24/48 hours

Hi you should get two lines. If the second line is darker or as dark as the other you should ovulate within next 48 hours. If it’s faint it’s negative but keep testing each day and it should get darker. Hope this helps.

Hi,
I’ve never had a line since that day above, should they be progressively getting darker the more closer to O I get? I might have to bite the bullet and buy the clear blue??

Also does it matter when I test? Is it better in the afternoon?