LetzLingo Features

Every Feature at a Glance

LetzLingo is a vocabulary-first language learning app designed to get words into long-term memory as efficiently as possible. Unlike apps that lock features behind subscriptions or require you to build decks from scratch, LetzLingo gives you a complete toolkit from day one — including the ability to import any PDF as a flashcard deck.

PDF Import — The Feature That Changes Everything

Most language learners already have great study materials: textbooks, printed vocabulary sheets from class, grammar guides as PDFs, or documents in their target language. Every other flashcard app ignores these materials and forces you to start from scratch.

LetzLingo is different. Tap the import button, select any PDF from your Files app, and LetzLingo extracts the vocabulary and creates a flashcard deck in seconds. Your textbook's Chapter 5 vocabulary list becomes a studyable deck without a single minute of manual entry.

Why Competitors Don't Do This

Anki technically supports imports, but only through CSV files — which means you still need to manually prepare a spreadsheet first. Quizlet requires you to type or paste text. Duolingo has zero import functionality; you study only what Duolingo's curriculum allows. LetzLingo reads PDFs directly — no conversion, no extra steps.

What You Can Import

• University course vocabulary lists (any language)
• Language textbook chapter word lists
• Teacher-provided handouts and worksheets
• Business terminology documents
• Heritage language materials for children
• News articles and reading passages

Spaced Repetition — How LetzLingo Builds Real Memory

Cramming vocabulary the night before a test might get you through the exam, but the words vanish within days. Spaced repetition solves this by exploiting the forgetting curve — a psychological principle showing that memory fades predictably over time.

LetzLingo's SRS engine tracks every card individually. When you mark a card as easy, the algorithm schedules it for review in several days. When you mark it as hard or wrong, it reappears within minutes. Over time, easy cards move to weekly, then monthly intervals — and stay in your long-term memory indefinitely.

This is the same method used by medical students memorizing thousands of drug names, professional interpreters building vocabulary in new language pairs, and polyglots who maintain fluency in 5+ languages simultaneously.

Languages Supported

LetzLingo covers 15+ languages with complete audio pronunciation support. Languages marked in green are rare in flashcard apps — most competitors don't offer them.

Why Croatian and Farsi Matter

Millions of people speak Croatian and Farsi as heritage languages — children of immigrants maintaining family languages, students in diaspora communities, travelers visiting the Balkans or Iran, and professionals working with those populations. Yet Duolingo offers no Croatian course at all, and Farsi support is limited to a beta course. LetzLingo supports both languages fully, with audio, from day one.

Russian is similarly underserved by gamified apps. LetzLingo's Russian support includes Cyrillic script display, correct audio pronunciation, and vocabulary decks specifically for beginners through advanced learners.

Audio Pronunciation — Hear It Right the First Time

Reading a word and hearing it spoken are completely different experiences — especially in languages with non-Latin scripts or tonal systems. LetzLingo includes native-speaker audio on every flashcard so you build correct pronunciation from the first encounter, not after weeks of bad habits.

Why Audio Matters for These Languages

• Chinese and Japanese: Tonal and pitch-accent systems make audio essential — reading romanized text alone will teach you wrong tones.
• Arabic and Farsi: Right-to-left scripts plus consonant clusters that don't exist in English require ear training alongside visual recognition.
• Russian: Stress patterns in Russian are unpredictable and change meaning — audio teaches you where stress falls naturally.
• Korean: Hangul is phonetically consistent, but liaisons and consonant assimilation rules mean written and spoken Korean often sound different.

Offline Mode — Study Without Limits

Many language learning apps claim to work offline but silently require a connection for audio, sync, or streak tracking. LetzLingo is fully offline once your decks are downloaded. Every feature — cards, audio, progress tracking, streak — works on airplane mode.

This is crucial for travelers (studying on long flights), commuters (in tunnels or underground), students in areas with poor connectivity, and anyone who simply doesn't want an app burning through mobile data in the background.

Progress Tracking

Motivation thrives on visible progress. LetzLingo's dashboard shows you exactly how your vocabulary is growing over time:

LetzLingo vs. The Competition

Here's how LetzLingo stacks up against the three apps most people compare it to:

PDF import is the only feature on this table that is unique to LetzLingo. No other major flashcard or language app lets you import a PDF directly.

Privacy — No Account, No Tracking

LetzLingo does not require an account. You never enter your email, create a password, or link a social profile. Your study data — vocabulary, progress, decks — stays on your device. LetzLingo does not sell data to advertisers or share your learning history with third parties.

This is in direct contrast to Duolingo, which requires account creation, tracks engagement metrics, and uses behavioral data for advertising. Quizlet also requires an account and limits features behind a paywall. LetzLingo believes your language learning journey is private.

Frequently Asked Questions

Start Learning Today

Free. Offline. No account. PDF import. 15+ languages. LetzLingo is the flashcard app language learners have been waiting for.