Learn Hindi on Rosetta Stone
Rosetta Stone is a language-learning app that started in the 90s for auditory learners.
Price: Free
Devices: Android, Apple Watch, iPad, iPhone, and Web
Hindi has so many unique concepts like पुंगी (pungi) (when someone pinches or flicks your nipple in order to annoy/hurt you), को (ko) (accusative preposition), or झूठा (Jhootha) (adj.) (food that has already been tasted by someone).
You can learn Hindi online on Mondly, Duolingo, Drops, Pimsleur, Rosetta Stone, Triplingo, Beelinguapp, Preply, Cudoo, or 50 Languages.