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I built a free whiteboard app for math teachers — one-stroke shapes, PDF annotation, laser pointer

Hey r/SideProject ! I'm a solo dev at Endless AI. A while back I watched a math teacher friend struggle through an online lesson — switching between a clunky drawing tool, a PDF reader, and screenshots just to work through one worksheet. So I built Whiteboard: a lightweight whiteboard app designed for teaching. What it does: Draw math shapes (circles, axes, 3D-ish boxes) with a single stroke — no menu diving mid-lesson Import and annotate multi-page PDFs / worksheets directly on the

五维评分

付费意愿
35
需求真实度
55
个人可落地
70
竞争空间
35
新鲜度
50

AI 分析

痛点:数学老师上网课时要在简陋的绘图工具、PDF 阅读器和截图之间反复切换,才能讲完一张练习卷,缺少一个把「单笔画几何图形 + PDF 批注 + 投屏激光笔」整合在一起的轻量教学白板。

目标用户:使用 iPad/平板授课的数学与理科教师、在线家教、教育机构讲师。

证据:A while back I watched a math teacher friend struggle through an online lesson — switching between a clunky drawing tool, a PDF reader, and screenshots just to work through one worksheet. ... Free to download; a few Pro features vary by platform. ... I'm a developer, not a teacher — I'd love feedback from anyone who's taught with a tablet.

变现:免费下载 + Pro 买断/订阅(LaTeX、函数图形、3D 立体、跨设备同步、课堂导出);面向学校或教培机构做批量授权与私有部署。

MVP:只做 iPad + Apple Pencil 的垂直版本:单笔画识别圆/坐标轴/立体框 + PDF 多页导入与手写批注 + 无限画布网格 + 一键导出课堂笔记,本地存储免账号,2 周可完成核心闭环,其余平台后置。

竞品:Explain Everything、GoodNotes、Notability、Explain Everything、Excalidraw、Microsoft Whiteboard、Whiteboard.fi、Miro、Google Jamboard(已停用)

摘要:一位独立开发者(Endless AI)在 r/SideProject 发布面向数学老师的免费白板 App:单笔画几何图形、多页 PDF 批注、无限画布、激光笔与专注模式,覆盖 iPad/iPhone/Mac/Android/Windows/Linux,体积小于 100MB、免账号、文件本地存储,基础功能免费、部分 Pro 功能按平台区分。帖中痛点来自作者朋友的真实授课困境,但全文没有任何付费意愿原话或收入数据,作者也强调自己不是老师、只是来收集反馈,因此需求验证仍偏弱。