Wikipedia:Articles for deletion/Sleep timer
I recall an editor worrying about topics are that are so simple and commonplace that it's hard to find detailed sources.  His example was the egg slicer but this topic seems similar.  I take the nominator's point but Google seems to have over 4 million hits for the phrase and it's difficult to go through them all to find the sort of general or historical material that the nominator would prefer.   But there's certainly lots written about the difficulty that people have going to sleep and a sleep timer is a reasonable aspect of that.  Another broad topic that we might merge into is time switch.  Overall, the key point is that our core policy  just requires sources for statements that are controversial or quotations and this stub seems to be neither
— user:Andrew, 09:51, 9 September 2019 (UTC)
Stance: keep
Cited policy: WP:V (Wikipedia:Verifiability)