Does this app really work? I’m beginning to lose hope

Kayla • Wife & mama raising two babes with my angel baby Ada in heaven. ✨ 10/3/2020 Rest In Peace my beautiful baby girl. 💖

I’ve been using the app premom with my pregmate opks and I received a “peak” when I tested. This has never happened before. So I didn’t drink anything after that and tested 2 hours later. The test looked the same as when I tested previously so is it the app that’s wrong or what? Has anyone had this happen before? Pic below for reference