Causa is an AI Spanish tutor that lives inside WhatsApp. No app to download, no Zoom calls — just practice whenever you have a few minutes. Send a text or voice message in Spanish and Causa responds both ways, correcting what you write and say, then continuing the conversation naturally. Choose your Spanish variant: Mexican, Argentinian, Peruvian or Spanish from Spain. Currently looking for beta testers — 7 days free, no credit card required.