橡皮错题 vs MathBoard

橡皮错题是一款简洁好用的学习工具，支持收录整理错题，轻松记录复习进度，高效攻克知识薄弱点。 我们的目标是，帮助更多同学吃透错题，稳步提分！！！ 我们为什么要做橡皮错题？ 很多同学刷题无数，但错题反复错；手抄错题耗时长，整理麻烦，错题本越积越厚，复习找不到重点。其实很多人不是不够努力，而是被低效的错题整理困住，无法定位自己的知识漏洞。于是，我想要做这款橡皮错题APP，帮大家把零散错题整理成清晰的复习清单，吃透每一道错题，高效查漏补缺。 【功能介绍】 - 快速录入：仅需两步，轻松添加你的错题 - 简洁界面：拒绝繁琐，清爽布局，错题列表一目了然 - 灵活排序：担心复习分不清优先级？手指拖拽，自由调整顺序 - 便捷修改：无需来回切换，随时随地编辑错题内容 - 记录进度：支持复习打卡，记录掌握状态，越学越有成就感 - 归档删除：长按即可移除错题，清理已掌握题目，轻装复习 ————————— 橡皮错题可以免费下载使用，欢迎你体验我们的产品。 遇到任何问题，请随时联系我 反馈邮箱：719586684@qq.com 隐私协议（Privacy Policy）：[https://www.dreammap.top/privacy.html](https://www.dreammap.top/privacy.html)

MathBoard is a handwriting-first mental-math practice app. Generate arithmetic worksheets, solve each problem by hand on an iPad whiteboard, and get instant auto-grading, wrong-answer explanations, and printable PDFs. Pick a ready-made set or build your own: ① Within-10 / within-20 / within-50 / within-100 addition and subtraction ② Two-digit addition and subtraction ③ Multiplication tables, division tables, and mixed × ÷ ④ Compare numbers (greater than, less than, equal to) ⑤ Four operations mixed Work each problem with Apple Pencil or a finger on a per-question whiteboard — line up column working, carry and borrow, draw it out. MathBoard grades instantly, tracks accuracy and time, and saves every wrong answer with the correct solution, your draft, and a step-by-step explanation. A built-in process calculator lets you enter a two-digit addition or subtraction and see the answer with vertical working and stick-counting visuals — the same show-your-work approach, on demand. Designed for families: ① Apple Pencil and finger handwriting on every problem ② Auto-grading with accuracy and timing stats ③ Wrong-answer book with explanation and your draft ④ One tap generates a similar set to practice weak spots ⑤ Printable PDF worksheets — student, answer-key, and explanation versions ⑥ Bilingual: English and 简体中文, switchable at runtime ⑦ Fully offline, no ads, no accounts MathBoard is local-first: worksheets, attempts, wrong answers, and PencilKit drafts stay on the device. Nothing is uploaded. Core practice is entirely free: all problem types, number ranges, and set sizes (including comparison and two-digit) are available without paying. MathBoard Pro unlocks PDF export, full step-by-step explanations with vertical and visual models, wrong-question drills, learning reports, and batch generation — choose a Monthly or Yearly subscription, or a one-time Lifetime purchase. Contact: sectojoy@gmail.com Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://zelonai.com/app/mathboard/privacy-policy