AF due on the 6?!

Ricki • 💍💙💙💗💙🌈

My question is that first time using this app Glo And was wondering if your period is on track! I use a different app for my af and it’s always on point! So Glo says the 6 th but my other app says the 8 and I checked other AF trackers and all say the 8th?!