Acids (citric acid in lemons and grapefruit) and bases (ammonia in cleaning solutions) we encounter in our daily lives. Other familiar acids are vinegar (acetic acid), vitamin C(ascorbic acid), and battery acid (sulfuric acid)
Acids are used in our daily life as
Sulphuric Acid is used in car batteries and we wont be able to run our car without it.Nitric Acid is used in fertilizers. Benzoic Acid's salt i used to preserve food.

Bases are used in our daily life as
Ammonia is used in fertilizers.Aluminium Hydroxide is used to make gastric medicines. Soduim Hydroxide is used in making of soaps and detergents.

Hope this helps :)