4You vs Algorena

Learn languages in a practical, fun, and engaging way every day. 4You turns the content you watch every day into real language lessons. Understand videos with bilingual subtitles and a one-tap dictionary, then improve your listening and speaking skills through Shadowing, Dictation, Cloze exercises, and AI conversations. More than just learning through videos, 4You helps you build vocabulary, practice speaking, reading, writing, and grammar in one app. Learn English, Chinese, Korean, Japanese, French, German, Spanish, and many other languages in a way that matches your interests and learning level. TURN YOUR FAVORITE VIDEOS INTO LANGUAGE LESSONS - Choose videos available on 4You, share or upload your own videos - Watch videos with bilingual subtitles and sentence-by-sentence transcripts - Look up words, phrases, and sentences instantly with the one-tap dictionary - Practice Shadowing to improve pronunciation, intonation, and speaking reflexes - Practice Dictation to improve detailed listening skills - Practice Cloze exercises to strengthen listening comprehension and vocabulary - Have AI conversations based on the topics and content from the videos you learn LEARN AND REVIEW VOCABULARY EFFECTIVELY - Save words and phrases to your personal vocabulary notebook - Learn and review vocabulary with flashcards - Practice vocabulary through different exercises - Review vocabulary with the Spaced Repetition method LEARN VOCABULARY THROUGH GAMES WITH WORD GARDEN - Combine vocabulary learning with gamification to make review less boring and more enjoyable - Learn vocabulary at every level, from beginner to advanced PRACTICE SPEAKING WITH AI - Practice speaking with AI across various topics, from A1 to C2 levels - Receive feedback on your answers and suggestions to improve your expressions PRACTICE READING, WRITING & GRAMMAR - Practice reading through books, articles, and various content based on your interests - Practice writing with different topics and receive support to improve your expression - Learn and practice grammar based on your level A VIBRANT LANGUAGE LEARNING COMMUNITY - Share learning content and your language learning journey - Share stories and interact with the community - Make friends and chat with people who share the same language learning goals - Exchange knowledge, experiences, and stay motivated together 4You supports learning more than 40 languages, including English, Chinese, Korean, Japanese, French, German, Spanish, Italian, Portuguese, and many more. Subscription Information - Length: 1 month, 3 months, 12 months - Price: $7.99/month, $26.99/3 months, $45.99/12 months - Terms of Use: https://4you.study/terms Web version: https://4you.study/ For feedback and support, please contact: 4you@eupgroup.net

Don't just watch algorithms. Call their next move. Algorena teaches algorithms the way they actually make sense: by running them. Every lesson is the same four steps. Watch the algorithm run, step by step, with every decision narrated. Then the machine stops mid-execution and asks you to call the next move — which cell does binary search look at now? Which neighbor does the queue serve? You answer, you find out immediately, and a wrong answer tells you exactly which idea slipped. Then three questions prove you understood the concept, not just the animation. Nothing here is a video. Every animation is the real algorithm executing on real data, generated fresh each time you practice — so you can never memorize a run. WHAT YOU LEARN • 58 skills across 18 tracks, from linear search to A* pathfinding • Free forever: arrays and search, two pointers and sliding window, prefix sums, the first sorts, stacks, queues and linked lists — 15 complete lessons, full quality, no teasers • Pro adds the advanced 43: merge and quick sort, heaps, radix, Timsort, hash tables, Bloom filters, LRU caches, BSTs, BFS and DFS, Dijkstra, topological sort, union-find, Kruskal, Prim, Bellman-Ford, Floyd-Warshall, recursion and backtracking, dynamic programming, flood fill, A*, KMP, Rabin-Karp, Boyer-Moore, tries, Huffman coding, minimax, alpha-beta pruning, quadtrees, convex hulls and Monte Carlo HOW IT WORKS • See — the algorithm runs on a live stage, with pseudocode highlighting the exact line executing • Predict — the run pauses at every real decision point and hands you the wheel • Understand — miss one and you get the specific misconception, not a red X • Prove it — three concept questions close every lesson A COACH THAT ACTUALLY WATCHES Algorena remembers which mistakes you repeat — not how many, but which kind. "You've been eliminating the half the target is actually in." Then it offers a three-round drill on exactly that. The Daily 5 mixes five skills a day, weakest first. BUILT FOR THE INTERVIEW, AND FOR AFTER IT Mastery per skill, a rank that climbs with the whole curriculum, and a streak that only asks for five minutes. ALGORENA PRO • All 43 advanced lessons • The Coach's drills and the Daily 5 across all 58 skills • No ads, ever • Every future lesson — included as the curriculum grows • One payment, shared with your family — no subscription PRIVACY, FOR REAL No account. No sign-in. No analytics of our own. No servers. Your progress never leaves your device — we couldn't see it if we wanted to. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/