at first the app worked great for me and i got the earliest updates regularly for my firmware.
I was curious recently, though, why i didn't receive any updates anymore for my SM-G950F (DBT)
The app says there is nothing newer than G950FXXU1AQDD(DBT) (Apr '17) when in fact on the updato website G950FXXU1AQH3 (DBT) is available since august.
I tried both simple and advanced search. with default settings and also searching just for my country code (all of DBT, DTM, VD2 and XEG). It never showed up. Deleted cache and data of the app. nothing. reinstalled the app. nothing.