问题
在平板上用 Excalidraw 和 AFFiNE 画图的用户反复受挫：Excalidraw
目标用户
在 iPad/Android/Windows 平板上用 Excalidraw 或 AFFiNE 做草图、白板和截图标注的自由职业者与知识工作者。市场规模定性看是开源画板工具的活跃平板用户群体（GitHub 单个 issue 即有 41 分热度、23 条评论），属于中等规模的细分人群，付费习惯不明。
解决方案
- 防误触与手写笔一等公民：以 Apple Pencil 为核心输入设计，手掌搭屏不画线；- 高性能渲染：针对 1000+ 笔画优化，iPad 上不冻结、低 GPU/电量消耗；- 单手可用的快捷操作：撤销按钮、白板模式一键切换、可自定义快捷键（如全部移到左手区）；- 截图标记工作流：快速导入截图并直接批注。AI 角色有限：可后续加入笔画整理、草图转结构图等，但核心是输入与渲染工程，不是 AI 产品。
MVP 范围
第一版只做 iPad + Apple Pencil：稳定防误触、撤销按钮、一键切换白板/标记模式、截图导入与标注，以及 1000+ 笔画不卡顿的渲染性能。明确不做：实时协作、云同步、桌面/Android 版、网页版。
风险
技术上，1000+ 笔画的流畅渲染和跨设备防误触是硬骨头，需要专门的图形/输入工程。市场上，Excalidraw 和 AFFiNE 都是开源项目，很可能自己补齐这些缺口，且其用户付费意愿低；苹果的 PencilKit/Freeform 也是平台级免费替代。商业化路径不清晰是最大风险，需先验证平板重度用户是否愿意为体验买单。
已有产品
| 产品 | 定位 | 价格 |
|---|---|---|
| Excalidraw | 开源画板工具，桌面优化为主，平板/手写笔体验被用户明确抱怨（无防误触、1000+ 笔画性能差） | — |
| AFFiNE | 开源笔记+白板，iPad 版 Apple Pencil 支持不完善（无防误触、无撤销按钮） | — |
信号证据
这张卡片依据的原始讨论。摘录保持原文，点“原文”查看上下文。
GitHub Issues · toeverything/AFFiNE10月20日功能请求▲ 145 条评论隐含付费意愿
“It is possible now, but without proper palm rejection etc, it is very difficult to use, similarly missing basic functionality like undo button or a button for switching to edgeless mode (have to go the menu on top right to switch).”
AFFiNE's iPad app lacks proper Apple Pencil support (palm rejection, undo button, quick edgeless mode toggle), making sketching and markups on screenshots very difficult.原文
GitHub Issues · excalidraw/excalidraw6月28日痛点▲ 412 条评论
“Palm rejection doesn't work properly on certain devices/browsers, causing unwanted lines”
Palm rejection in Excalidraw is inconsistent across devices, causing unwanted lines when the hand touches the screen while drawing with a stylus.原文
GitHub Issues · excalidraw/excalidraw6月28日痛点▲ 412 条评论
“Significant performance degradation with 1000+ strokes on tablets”
On tablets, Excalidraw degrades significantly with 1000+ strokes, including freezing on iPad and high GPU/battery drain from vector rendering.原文
GitHub Issues · excalidraw/excalidraw6月28日投资方向▲ 412 条评论
“while Excalidraw functions on touch devices, it's currently primarily optimized for desktop use and lacks many features that tablet users expect from modern drawing applications.”
Excalidraw works on touch devices but is optimized for desktop and lacks standard tablet features like multitouch, stylus handling, gestures, and performance at scale.原文
GitHub Issues · excalidraw/excalidraw7月21日功能请求▲ 3723 条评论
“I really want to move all binds to the left side of the keyboard, so I can access them all without moving my left hand.”
Excalidraw users cannot customize keyboard shortcuts, e.g. to move all binds to the left side of the keyboard.原文