Ovulation Testing Question? Newbie

Taylor • Girl Momma to 3 Princesses! 💕 Homestead Wife

So it’s my first time ever using ovulation tests! I’m more or less curious about when I ovulate each month! But the t/c ratio thing confuses me. To me all these tests look the same. Faint and not a “peak” so why are the numbers different? All tests pic taken at 5mins mark like the instructions said to do!

Normal 28 day cycle here if that counts for anything!