Frequently asked questions

KaigoAI is an AI language-learning app for learning English, German, Spanish, French and Chinese. It combines spaced-repetition vocabulary review, dictation, voice conversation with an AI partner and head-to-head word duels, with a daily goal that grows only as fast as you do.

English, German, Spanish, French and Chinese. You can study several at the same time and switch between them from your profile, where each language keeps its own words, level and progress.

You choose a starting pace: Gentle is about 5 minutes and 3 new words a day, Steady about 15 minutes and 6 new words, and Ambitious about 30 minutes and 10 new words. The target grows gradually as you keep hitting it.

Nothing is lost. Words past today's comfort-zone limit are saved in a queue and become active as your limit grows, so you are never punished for being enthusiastic.

You tell it your level in each language. European languages use the CEFR scale from A1 to C2 and Chinese is shown on the HSK scale. Generated words, dictation paragraphs and conversation are pitched at that level.

KaigoAI works in the browser on phones, tablets and computers, and a browser extension lets you save words while you read.

It depends on your starting point and your native language, but a steady daily habit matters more than long, rare sessions. Reaching a comfortable everyday level usually takes many months of regular practice.

Add the English words you meet, and KaigoAI writes a plain-English meaning and an example sentence for each, then schedules them with spaced repetition. You can also practise English with dictation paragraphs at your level and talk with an AI partner that replies in English.

The US Foreign Service Institute estimates roughly 900 class hours for an English speaker to reach professional working proficiency in German. Reaching a comfortable conversational level takes far less, and a daily habit of 15 minutes adds up quickly.

German is moderately difficult. Vocabulary is often familiar because English and German are related, but grammatical gender, cases and word order take time. Learning each noun with its article from the start makes the biggest difference.

The US Foreign Service Institute estimates about 600–750 class hours for an English speaker to reach professional working proficiency in Spanish, which makes it one of the quicker languages for English speakers. Everyday conversation comes much sooner with regular practice.

Spanish is among the easier languages for English speakers: regular spelling, lots of shared vocabulary and a consistent sound system. Verb conjugation and the subjunctive are the main hurdles.

The US Foreign Service Institute estimates about 600–750 class hours for an English speaker to reach professional working proficiency in French. Everyday conversation comes sooner, especially with regular listening practice.

French is moderate: a lot of vocabulary is familiar, but pronunciation, silent letters and grammatical gender take time. Listening practice such as dictation helps the most.

The US Foreign Service Institute estimates about 2,200 class hours for an English speaker to reach professional working proficiency in Mandarin, making it one of the longest. Basic conversation comes far sooner, and steady daily practice is what gets you there.

Yes, mainly because of tones and the character writing system. Grammar is relatively simple, with no conjugation or gender, so many learners find the structure easier than the sound and writing.