NB is an Android app developed by Brewalan Le Dru (Le Conjugueur SPRLU Avenue comte Gérard d'Ursel 5 1390 Grez-Doiceau Belgique). Others apps created by Brewalan Le Dru are: Le Conjugueur.

NB first became available on 04 Mar 2015. It is estimated that NB has been downloaded between 10000 and 50000 times from the Play Store.