Found a free deal on intermittent fasting app Fasted.

Found it here - https://www.promodescuentos.com/ofertas/google-play-fasted-ayuno-intermitente-con-amigos-codigo-de-por-vida-gratis-health-1139811

Go to https://getfasted.app/code, sign in with the same method as you will in the app, and enter the code "HEALTH".