LH strips

Hello, I’m really confused, I’m not really <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> or anything (kind of am but kind of not) me and partner are just having sex and putting no pressure on ourselves. But I did buy some ovulation tests just to see what they are like, I’ve taken 3, yesterday’s one was lighter than the day before and today is just as light as yesterday but my app says I’m due to ovulate in 5/6 days... is it normal for them to be light even thought I’m due to ovulate soon? Thank you.