Last time I used these a few months ago (ended in mc) I got positives with frer from 10dpo. The CB ones are also meant to be 6 days early but they didn’t show positive till 13 dpo and the CB early digital till 14 dpo!
I couldn’t get a frer this month so using the CB 6 days early. Online it said I could test from sat 3 June but that seemed excessively early so I waited till the 5 and stark white negative. My period was due today and nothing yet I’ll test again tomorrow but I do t think these are really as sensitive as they claim to be ?
If you used them what day did you get your first positive ?