Are smartphone applications (App) useful to improve hearing?

Are smartphone applications (App) useful to improve hearing?
Acta Otorhinolaryngol Ital. 2020 Jun 10;:
Authors: Martinez-Beneyto P, Franchella S, Alonso Rodriguez F, Navarro Velasquez R, Martinez-Beneito MA, Martini A, Marco Algarra J
PMID: 32519992 [PubMed - as supplied by publisher]

Source: Acta Otorhinolaryngologica Italica - June 12, 2020 Category: ENT & OMF Tags: Acta Otorhinolaryngol Ital Source Type: research