OPK apps

Danielle

I stopped taking my birth control about a year ago. Me and my fiance have been TTC for about 6 months now. My period is so irregular, the last time I got a period was the 18th of may. No period in june, come july today AF showed, first period I've had since then. I just received my pregmate ovulation and hcg strips in the mail. Hoping to use those and figure out exactly when I ovulate, any advice on apps to use to track opk strips?