Mental Math Fun vs 认识字母

Mental Math is a daily arithmetic practice app designed for elementary school kids — parents set the questions, kids answer out loud. FREE CORE PRACTICE - Addition & subtraction within 10/20/100/200, with carrying/borrowing and chained operations - Multiplication & division: times tables, 100/200 range, mixed operations - Choose your own question count, see accuracy and time instantly after each session VIP TRAINING ZONE — 8 advanced drills - Squares (1-20) - Cubes (1-10) - 11-19 multiplication - Powers of 2 (2^1 to 2^10) - Prime number checks (1-100) - "5x" training camp (25×40, 125×8, squares of numbers ending in 5) - Fraction-decimal conversion - Pythagorean triples (10 classic triples, with triangle diagrams) PRINTABLE WORKSHEETS - Horizontal, vertical (including decimals), and fraction layouts - Auto-paginated to fill a page, with a matching answer sheet - Scan a QR code to check answers instantly ACHIEVEMENTS - Multiple achievement tracks: consistency, streaks, personal bests, and training medals - Score 100% on each of the 8 training drills to unlock a stamp; collect all 8 for the ultimate title - Up to 3 profiles, each tracking its own history and best records No personal data is collected. Everything stays on your device and is erased on uninstall. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

认识字母是一款专为2-6岁儿童设计的英语字母认知启蒙App，通过7个精心设计的互动关卡，帮助孩子循序渐进地认识26个英文字母。 【7大互动关卡】 第1关 认一认：看图听音，四选一认识基础字母 第2关 听一听：听清名字，选出对应字母卡片 第3关 配一配：拖拽字母，匹配正确影子 第4关 连续闯关：10题混合挑战，3条命闯关模式 第5关 拼一拼：字母碎片拼图，拼出完整图案 第6关 找字母：在趣味场景中找出隐藏字母 第7关 玩字母：字母序列思维，猜猜下一个字母 【产品特色】 - 循序渐进：从认读到思维，难度逐步提升 - 多感官学习：视觉识别 + 听觉辨音 + 动手操作 - 可爱伙伴：Letterie 全程陪伴，即时鼓励反馈 - 家长控制：每日时长锁，科学管理使用时间 - 纯净环境：无广告、无第三方SDK、无数据收集 【免费体验】 第1关完全免费，满意后再解锁全部7关。 【订阅说明】 - 终身解锁：一次买断，永久享有全部关卡 - 月订阅：每月自动续费，含3天免费试用 - 年订阅：按年自动续费，含3天免费试用 - 订阅可随时在iOS设置中取消 Copyright © 2026 wangzz 隐私政策：https://github.com/wangzz/md-doc/blob/main/KnowLetter/PRIVACY_POLICY.md 使用条款（EULA）：https://www.apple.com/legal/internet-services/itunes/dev/stdeula/