30-32 day cycle length expert trackers needed :)

Hi ladies im from ntnp and know you girls know your stuff when it comes to tracking cycles and what not.
My cycles are usually 30-32 days long.
My period started on the 2nd october and finished on the 6th. What are my most fertile days going by the "norm" just to get a rough idea?
I do have an app but its proving useless!
Thanks in advance x