About this app
LUMO helps you build vocabulary your way: with personal flashcard decks, instant translation, and a study flow designed to keep you moving. Create collections for any topic: travel phrases, exam prep, work vocabulary, or words you pick up every day. Type a word, tap Translate, and your flashcard is ready. No switching apps, no copy-paste. STUDY THAT STICKS • Flip cards to reveal the translation • Swipe right when you know it, left when you need more practice • Cards you’re still learning stay in the deck until you master them • Reverse mode — practice from translation to word • Built-in pronunciation: hear words and translations while you study ORGANIZE YOUR LEARNING • Group words into custom collections • Filter decks by status: New, In progress, or Learned • Track total words and how many you’ve learned • Study again anytime to refresh a finished set WORKS WITH YOUR LANGUAGES Choose source and translation languages including English, Spanish, French, German, Italian, Portuguese, Russian, Polish, Japanese, Korean, Chinese, Turkish, and Arabic. Set your preferred language pair once and build decks faster. YOUR DATA, YOUR DEVICES Sign in with Apple or email. Your collections sync to the cloud so you can pick up where you left off. Decks are stored locally too — study offline and sync when you’re back online. DESIGNED FOR iOS A calm, focused interface with light and dark appearance. Available in multiple interface languages. Whether you’re starting a new language or sharpening vocabulary you already know, LUMO turns words into flashcards you’ll actually use. Download LUMO and start your next collection today.
Latest release
What’s New
NEW: Practice mode. Studying is only half the job — now you can prove you actually know your words! Quiz yourself, your way: • Multiple choice, type the answer, listening, or mix them • Hear the word and pick or type the translation • Test just your learned words or your whole deck • Set the session length and swap the language direction • Check your score and retry only what you missed Still here: paste a list from Notes, turn it into flashcards in minutes, and search across all your collections. Thanks for learning with LUMO!
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 21, 2026 · 1:53 AM Free
Screenshots
