Early Results with wondfo strips?

LM :)
Has anyone gotten a BFP before AF with a wondfo?
​I got BFN's on 12DPO and 13DPO with wondfo strips.
​We don't get FRER in SA :( 
​I have a clearblue but want to keep that for when AF is missed.
​Can wondfo detect early or must I rather use the clearblue one?