Am I near ovulating?

First picture is an ovulation test I know it's negative as it's not a strong line as the other one.

I calculated that my cycles are 24 days and I bleed from about 3-4 days.

My ovulation says on the app that it's the 21st August that I'm at high risk of getting pregnant and the pregnancy test is negative as seen below

when should I test again for both lines to be strong?