Delta单词 vs Recall

世界语言，装进口袋 5大洲、10+语系、60+语言、100+词书 纯粹背词，回归简单 背单词最重要的当然是优雅 Polyglot就是你！ 彝语、泰米尔语、尤卡坦玛雅语一网打尽 多词书模式 同时背多个语言是别样的快乐 大千世界，我想看看 学习一种语言，就等于获得了第二个灵魂

Recall is the flashcard app that actually works — powered by FSRS-5, the most accurate spaced repetition algorithm available, so you review cards right before you'd forget them. Study smarter, not harder. Stop wasting time on cards you already know. Recall schedules every card individually based on how well you remember it, showing you the right card at the right time. Beautiful review experience. Flip cards with a satisfying spring animation. Swipe left to repeat, swipe right for easy — or use the four-button rating to dial in exactly how well you knew it. Each button shows your next review interval so you always know what's coming. Home screen widget. See your due cards, study streak, and mastery rate without even opening the app. Available in small and medium sizes. Import & export. Bring your existing flashcards from Excel (.xlsx), CSV, TSV, or text files — each sheet becomes a deck automatically. Export any deck as CSV to share or back up. Keep your streak alive. Your study streak is front and center. Recall tracks every day you study and celebrates your consistency. Set a daily reminder so you never miss a session. Everything in sync. Your decks, cards, and progress sync across all your devices via iCloud — automatically, with no setup required. Built for real learning. - FSRS-5 algorithm — trained on millions of real study sessions - Home screen widget — due count, streak & mastery at a glance - File import — Excel, CSV, TSV, and text files - Activity calendar — see your study history at a glance - Mastery tracking — watch your deck progress from New → Learning → Review - Adjustable daily new card limit — build your habit at your own pace - Deck export — share your cards as CSV