English Plus One vs DeltaBook

[AI Writes English Just for You] Pick the words you want to learn — AI writes a leveled article around them. 10-question CEFR placement maps to TOEIC / IELTS / TOEFL. Fully offline. No subscription. Nothing leaves your device. [Smart Placement Diagnostic] Not sure of your level? The built-in Dynamic Placement Test: • Smart algorithm draws questions one level above your current ability. • Just 10 questions to map your CEFR level (A1–C2). • Auto-adapts content: AI dialogues and reading articles match your level instantly. [Key Features] • On-Device AI Conversation — Qwen 2.5 & Llama 3.2 models. No internet needed; 100% of your data stays on the device. • AI-Crafted Articles — Pick the words you want to learn; AI writes a themed article around them. • Tiered Vocabulary (A1–C2) — CEFR high-frequency vocabulary with cross-references to common English certifications. • Learner-Friendly Definitions — 5,674 words rewritten for CEFR-graded readability; no more hard words explaining harder ones. • Hardware Adaptation — Auto-recommends the optimal model for your device. [Full Experience] • Daily reading streak — Home Screen and widget show the flame in sync; every open is a new challenge. • Learning insights — one-page dashboard for reading activity, vocabulary growth, CEFR trend, topic mix. • Achievement unlocks — milestone pop-ups for words, articles, streak days, and CEFR level-ups. • Concrete progress — model loading and article generation show ETA, can be canceled mid-flight. • 11 interface languages — Traditional Chinese, English, Japanese, Simplified Chinese, Korean, French, German, Spanish, Portuguese, Vietnamese, Indonesian. • Full accessibility — VoiceOver, Dynamic Type, Reduce Motion all supported. • iPad / Mac three-column layout — ⌘⇧N pops the article into its own window; full physical keyboard shortcuts. • Article history — last 10 articles persisted; the left column survives cold start. ----- cross-promo (auto-generated; do not edit) ----- More from the developer: Kana Juku · Python Dimensions · Auditory Companion · Gantt Planet — Search «ChengChe Lee» on the App Store.

DeltaBook is a subscription-based learning app that provides unlimited access to all courses after subscribing. The app includes structured courses with chapters and lessons. Lessons contain high-quality videos and interactive quizzes. Users can also attempt challenge quizzes to test their knowledge and earn achievement badges for their progress. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/