The Spanish of Spain (vosotros, vale, tío), not neutral Latin American.
Most apps teach Latin American Spanish and call it Spanish. That's fine for a quiz streak. It falls apart at the counter, on the phone, and in your landlord's voice notes. TangoLango teaches European Spanish (Spain, peninsular) as its own course: the words, the grammar habits, and the register of the place you actually live.
Every sentence you learn is generated for your life (the lease, the pharmacy, your kid's school), then checked by a dialect guard before you ever see it, and recorded with a native European Spanish (Spain, peninsular) voice, not a generic accent or a "standard" borrowed from somewhere else.
Text the tutor any word or situation and it becomes a card with translations and native audio, in español.
A deterministic validator plus an AI judge audit every sentence against Latin American Spanish drift before it reaches you.
Ten minutes a day: review what you're about to forget, hear every sentence in a native voice, build the ear that real life demands.
Chat with your Spanish tutor any time to capture a word or prep for what's coming up. One new word a day, and your list managed for you.