A Telegram bot is like a virtual assistant inside the Telegram app. It looks like a regular chat where users can send normal messages, voice messages, or commands to the bot, and the bot responds automatically. It feels like chatting with a person, but it's all done by a program.

Spaced repetition is a learning technique where sentences are presented for translation at increasing intervals of time, based on how well the user remembers them. The bot revisits sentences more frequently if the user struggles with them, while those mastered are shown less often. This method helps to reinforce memory retention and improve long-term learning of vocabulary and grammar.

Active vocabulary refers to the words a person can confidently use in speaking and writing. These are words they can recall and apply with ease in everyday communication. In contrast, passive vocabulary consists of words that a person understands when reading or listening but may not readily use themselves. Active vocabulary is typically smaller but more accessible, while passive vocabulary is larger and includes words that are recognized but not regularly used.

Language proficiency levels, defined by the Common European Framework of Reference for Languages (CEFR), are divided into six levels:

• A1 (Beginner): Can understand and use basic phrases for everyday needs and can introduce themselves.
• A2 (Elementary): Can handle simple tasks and conversations about routine matters and basic personal information.
• B1 (Intermediate): Can understand the main points of clear texts on familiar topics and handle travel or work-related situations.
• B2 (Upper Intermediate): Can communicate fluently on a wide range of subjects, express opinions, and understand complex texts.
• C1 (Advanced): Can use the language flexibly and effectively for professional, academic, and social purposes with a high degree of fluency.
• C2 (Proficient): Can understand virtually everything heard or read and express themselves spontaneously and precisely, even on complex topics.

These levels help gauge language learners' abilities from basic to near-native proficiency.

The approximate vocabulary size associated with the different CEFR language proficiency levels is as follows:

• A1 (Beginner): 500–1,000 words. Basic phrases and simple vocabulary for everyday needs.
• A2 (Elementary): 1,000–2,000 words. Familiar words for routine tasks and personal information.
• B1 (Intermediate): 2,000–3,500 words. Broader vocabulary for common topics, travel, and work situations.
• B2 (Upper Intermediate): 3,500–5,000 words. Can express more nuanced ideas and understand more complex texts.
• C1 (Advanced): 5,000–8,000 words. Can use a wide range of language fluently for professional, academic, and social purposes.
• C2 (Proficient): 8,000–16,000+ words. Can understand virtually all language and use precise vocabulary even in specialized or complex contexts.

These numbers provide a rough estimate and can vary depending on individual learning paths and the specific language.

Free users (without subscription) can access the first 500 items (A1 level) in the vocabulary and verbs exercises, with the possibility of a higher limit if coupon codes are redeemed. Free users can also use the AI assistant up to 20 times per day. Subscribed users, for $5.99 per month, unlock access to all ~8000 items (B2 level) in the vocabulary and verbs exercises across all courses, and can use the AI assistant up to 300 times daily.

You can unsubscribe at any time, retaining access to premium content until the end of the current billing period, and your progress will be saved. Resubscribing restores immediate access once the payment is processed.

Anything! The bot knows the context of the conversation in Telegram, therefore you can ask about meaning of words, for more examples, for differences between two verbs, etc. Use it as you are comfortable.

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