Can anyone tell me what’s up lol

Hey ladies ok so I have 2 apps to track my period my period is pretty irregular I log in the same I got on both apps but I’m getting 2 different period days this happened my last period and it ended up starting 4 days before glow said it would and it lasted an extra 2 days the first picture is the flo app and the second is glow I’m not sure what app I should go off of? I’m pretty sure glow has to be way off considering the dates lol let me know what you guys think which app should I really depend on