LetsLearn icon
Language vocabulary app

LetsLearn

Learn 3,000 words in 12 languages with flashcards and word games

LetsLearn is a vocabulary app by Rui Codex for Android that teaches 12 languages with flashcards, spaced repetition and 18 word games. Each language has 3,000 words from CEFR level A1 to C2, with natural-voice pronunciation and example sentences. It is free to use with daily limits and ads; LetsLearn VIP removes them.

  • Android
  • Free
  • In-app purchases
  • Contains ads
  • Content rating: PEGI 3

Screenshots

Scroll sideways or use the arrow keys.

English to Spanish flashcard for la casa with the phonetic spelling, an audio button and the example sentence La casa es grande
Flashcard for the word student with the hint Tap to flip and listen
Set complete screen listing the learned words la casa, la puerta and la silla with a short conversation that uses them
Game Room with the Daily Round at double points and games such as Taboo and Tap What You Hear
Daily Round quiz questions asking for the meaning of la silla and for a word heard in audio
Level picker showing CEFR levels from A1 Beginner to C1 Advanced

Features

  • 12 languages, 132 pairs

    Learn any of 12 languages from any of the others; the whole app switches to your own language, Arabic right to left.

  • 3,000 words per language

    Six CEFR levels from A1 to C2, 500 words each, filterable by nine everyday categories.

  • Spaced repetition

    Known words come back after 1, 3, 7 and 16 days and further; missed words return in ten minutes.

  • Natural-voice audio

    Automatic pronunciation with two voices per language, a slow version, phonetics and example sentences.

  • 18 word games

    Sentence games, Taboo, Word Monster, Tower, Word Rain, a timed quiz and a double-XP Daily Round.

  • Habit and league

    Daily goal, streaks with freezes, a ten-tier weekly league, daily missions and 123 achievements.

  • Guest start

    Start immediately without an account; sign in later to keep progress across devices.

About LetsLearn

LetsLearn covers English, Spanish, French, German, Italian, Dutch, Danish, Turkish, Japanese, Korean, Chinese and Arabic, and any of the twelve can also be the language you study from, which makes 132 language pairs. Every language has 3,000 words split into six CEFR levels of 500 words each, so a beginner starts with numbers, food and family while an advanced learner works on idioms and specialist terms. Progress is tracked separately for every pair.

A study session is a stack of cards. Tap a card to flip it and hear the word in a natural voice, then swipe right if you knew it or left to see it again. Spaced repetition schedules the next review at 1, 3, 7 and 16 days and further, while a missed word returns in ten minutes. Cards show the phonetic transcription, an example sentence with its translation and, for German, Dutch, French, Italian, Spanish and Danish nouns, the article.

The Game Room turns words you have already seen into 18 games, including sentence games, Taboo, Word Monster, a timed quiz and a Daily Round worth double XP. A daily goal, a streak with streak freezes, a ten-tier weekly league and 123 achievements keep the habit going. The free plan gives 12 new words and 10 games a day, reviews are always free, and an account is optional.

Who it is for

Learners from beginner to advanced who want to build vocabulary in short daily sessions, in any of 12 languages and from any of them.

LetsLearn — Learn 3,000 words in 12 languages with flashcards and word games

Watch the trailer

Watch the trailer

The video loads from YouTube, in privacy-enhanced mode, only after you press play.

Built by Rui Codex

We design, build and publish our own apps with the same engineering we put into client software.

Built in Flutter with an ASP.NET Core (.NET 9) API and SQL Server behind it. The interface is fully localised into all 12 languages, including right-to-left Arabic, and every card carries audio pronunciation, phonetic transcription and an example sentence.

Technology

  • Flutter
  • Dart
  • ASP.NET Core (.NET 9)
  • SQL Server
  • Appwrite

Related services

Frequently asked questions

Is LetsLearn free?

Yes. The free plan gives 12 new words and 10 games a day, and reviews are always free. LetsLearn VIP, monthly, yearly or lifetime, removes the daily limits and ads.

Which languages can I learn?

English, Spanish, French, German, Italian, Dutch, Danish, Turkish, Japanese, Korean, Chinese and Arabic, from any of the same twelve languages.

Do I need an account?

No. You can start as a guest. An account is optional and keeps your progress across devices.

How many words does each language have?

3,000 words per language, split into six CEFR levels from A1 to C2 with 500 words each.

Is LetsLearn on iPhone?

Not at the moment. LetsLearn is published on Google Play for Android phones and tablets; there is no App Store version yet.

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