Can Ovulation Apps be trusted?

Rico73

Hey ladies; I downloaded 6 <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation Apps</a> and set my last period date. 3 predicted ovulation on the 21; 2 on the 19 and 1 on the 24th (<a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a>).

Now tell me can these Apps be trusted if I don't check my opk and temperature daily.