System Design Refresher vs LangoFunk

System Design Refresher is a free study companion for software engineers preparing for system design interviews. WHAT'S INSIDE • 30+ system design articles covering distributed systems, databases, caching, and more • Engineering blogs from top tech companies (Google, Meta, Stripe, Airbnb, and more) aggregated in one place • AI-powered flashcards with spaced repetition • Ask AI to summarize or explain any article in plain language • Favorites, reading progress tracking, and custom RSS feeds FEATURES • Works offline — articles download for reading without internet • Dark mode, font customization, and text size controls • Face ID / Touch ID lock for privacy • Sign in with Google or Apple, or use as a guest with no account required

Follow the Funk to Fluency. LangoFunk turns the songs you already love into your language classroom — and hands you millions more you have never heard. WHY MUSIC WORKS You have already heard that song forty times. You already know the melody. LangoFunk just adds the meaning — so the words stick without a single flashcard. DISCOVER MUSIC YOU’D NEVER HAVE FOUND Most people learning a language have no idea what is actually playing in the countries that speak it. Browse the Top 100 charts from Brazil, Mexico, France, Italy and more, or search for any song or artist by name. TAP-TO-TRANSLATE LYRICS Lyrics scroll in time with the track. Tap any word or phrase for an instant translation in context — not a dictionary guess. Hit the speaker to hear it said properly. MARK AS YOU LISTEN Three-tap word marking keeps your progress visible at a glance. Gray for words you already know, yellow for words you are saving, red for names and words that are not really words. YOUR WORD BANK Every word you save lands in your Word Bank with the lyric line it came from. Review it, drill it, and remember it because of the song it lives in — not because it was card number 47. MEET PAPA FUNK Papa Funk is your AI tutor: a snow monkey in DJ headphones with better grammar than patience. He drills your saved words, explains the slang a translation flattens, and points you at new music based on what you actually listen to. LEVEL UP Daily goals, XP, streaks, and levels. Track your words learned over time and watch the graph climb. LANGUAGES Learn Spanish, French, German, Italian, Russian, Portuguese, or English. The app itself is available in English, Spanish, French, and Portuguese. WHO IT’S FOR • Learners who stalled out on flashcard apps • Music lovers who want to understand what they are singing • Anyone who would rather learn from real language than textbook dialogue Terms of Use- https://www.langofunk.app/terms