Using different apps?

Kristen • Jasmine 💕 30.10.20 👶🏻🌎♥️

I use glow and Ovia and glow is telling me my period is due on the 3rd but Ovia is telling me I am due on the 29th, last period said I was due on the 1st December which was exactly what happened. My leutal phase was 12 days and it would be 12 days again getting my period on the 29th.

Would you say Glow is slightly out on my period prediction and have a good chance if pregnancy this month?