When did ovulation happen

ray

I missed a couple bbt days but my ovulation test was positive on the 7th (I had light spotting that day as well) and negative ovulation test on the 5th and 8th.

My fertility friend app says I ovulated on the 9th.

My daysy thermometer say I ovulated on the 5th.

I’m curious of others input on my chart and curious what day is closest to being correct?