Confused!

I’m confused about how my perios predictions are so different (pics below). So...generally my cycles are pretty regular (2-3 day fluctuations, maybe that’s not perfectly regular but I know it’s close). Last cycle was my first after mirena and was super short! FF says the biotch is coming Monday and glow says Saturday? I’ve input info from the past 4-5 months, but I’m wondering if FF is weighting my most recent light cycle too strongly? Any tips would be much appreciated! Do i just wait until end of next week?!