Hello I’m not sure where to put this but Glow and my fit bit app are giving me different information regarding my cycles despite me entering he same information on both.

Okay so I had a cycle on August 11th to the 17th. According to Glow my suggested cycle is 10days late. Ovulation Aug 25th to the 31st.

According to my Fitbit app my suggested cycle should start Oct 2nd to the 9th. ovulation Sept 13th to the 19th.

I tested and got a positive ovulation test on the 16th of Sept and had sex on the same day and on the 18th.

Any suggestions?