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Screen Annotations - draw, write math and sketch diagrams on top of anything on your Mac or iPad (I built it)

Hi all, I'm Adib. I teach and make tutorials, and I kept wanting to circle things, draw arrows and write equations right on top of whatever was on my screen, without switching to a separate whiteboard app. So I built Screen Annotations (it's called Annotate Screen on the App Store). What it does Draws over any app on your Mac: 12 tools, 135+ shapes and smart arrows, with one-key shortcuts (P for pen, A for arrow, G for a laser pointer). STEM extras: coordinate planes, function plots

五维评分

付费意愿

需求真实度

个人可落地

竞争空间

新鲜度

AI 分析

痛点：教师和教程作者在讲课或录屏时，需要在任意屏幕内容上直接圈画、写公式，而不想切换到独立白板应用。

目标用户：教师、在线课程和教程创作者、做产品演示或录屏讲解的人，以及 STEM 内容作者

证据：I teach and make tutorials, and I kept wanting to circle things, draw arrows and write equations right on top of whatever was on my screen, without switching to a separate whiteboard app. / Price: $14.99 one-time on the App Store, and one purchase covers both the Mac and iPad apps. / An MCP server, so Claude Code, Claude Desktop, Cursor or Codex can draw diagrams on your screen or boards for you.

变现：一次性买断（类似 $14.99，Mac+iPad 通用）为主，可加教育/团队批量授权；提供 AI 绘图（MCP）或云同步，作为订阅版增值点

MVP：两周内做一个 macOS 菜单栏常驻工具：全局快捷键唤起，笔、箭头、高亮、激光笔、橡皮、取色圈选，点击穿透，一键截图或导出 PNG，不做白板、LaTeX 和 iPad 端

竞品：Presentify、ScreenBrush、Epic Pen、ZoomIt、Annotate (Mac App Store)、DemoPro

摘要：独立开发者 Adib 上架了 macOS/iPad 屏幕标注应用 Screen Annotations，$14.99 买断、一次购买双端通用，含 12 种工具、135+ 图形、LaTeX 公式渲染以及可让 Claude Code/Cursor 在屏幕上画图的 MCP server。它验证了“教学录屏即时标注”这一细分付费品类确实存在，但同类竞品密集，且帖子未披露任何销量或用户付费反馈，付费意愿只能算中等偏弱。