The first ovulation test 1 day after my period


I decided to start using ovulation test strips to track my ovulation. This was my first strip the day after my 5 day period. I am very regular in my cycle. I have a 30 day cycle and 5 day periods. My app says I should ovulate on The 6th of Sept. 2021 but this test strip seems very close to almost ovulation positive and it's only August 26th 2021 (11 days from my supposed ovulation day) I will continue to daily test and wait for the test line to be darker than the control line. I was just wondering if it is normal to have a pretty dark test line the day after my period?