Which app do I go by?

Question

I have 3 different apps telling me different dpo. Which app should I go by?

Answer

After your first positive opk you should ovulate within 12 to 48 hours. For you that could be the 31st or the 1st and you'd be 5dpo/6dpo

Answer

It looks like your first positive OPK was 3/30, so your estimated ovulation day would be 3/31. On 4/6, you’d be 6DPO.