TTC baby #1 - will 1 abnormal cycle length affect when i ovulate??

My average cycle length varies between 29-32 days.. thats normal for me and my fertility tracker app says that that cycle length variation is regular

But my last cycle was 36 days..

Will it have any affect on my predicted ovulation date?

I'm a bit confused as i have two apps; GLOW and Flo

One says based on my cycles (including abnormally long one) i should ovulate on 4 July

While the other app says 7 July

On the cycle that lasted 36 days from finish of period to the start of the next one, my period was due on 13 June but came on 18 June. I had pretty bad cramps but no period till the 18th.

So i'm just wondering.. if i have sex on 4th July and end up ovulating on 7th July, what are my chances of getting pregnant???