Different due date?

Natasha

First of all, I'm aware it's only a day off and the chance of me actually having our baby on the due date is slim lol I'm just curious! 😊

The first day of my last period was Janurary 15th. All of my apps ( I'm using 4😂) say I am due October 21st. But my doctor says I'm due the 22nd! He used one of those paper wheel turny things - sorry no clue what its called! And he says they are old school but still work, but I'm just curious where the extra day comes from.. lol is it because this year was a leap year? I feel like my date is more "accurate" so I've been going by the 21st 😁