--- title: "恒等数学 - Reviews, Revenue and Downloads in China | Apple App Store" description: "适合笔+iPad使用，目前的3.1.8版本可根据基础的点线面等元素快速画图以辅助理论探索，支持函数图像绘制 基础功能免费,但包含一些收费功能，联动点功能，隐圆和颜色块功能，新建超过5个文件夹，平面坐标系的弧度制显示，3D坐标系，向量箭头，参数方程，水滴上色等等 除了几何部分，便签功能也是核心之一，它可以固定在页面以显示最主要的步骤，多余且无用的笔迹可擦除避免牵扯精力 除此之外还有以下功能： 1、手" --- # 恒等数学 — China > 基础几何绘图、交互、辅助作业 ![恒等数学 App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/2b/fb/05/2bfb05bb-ad49-dcb2-c167-9d33c39eec01/AppIcon-0-0-1x_U007epad-0-1-0-85-220.jpeg/434x0w.png) **Developer:** [Unknown](https://apptail.io/developer/unknown-wJhOM) **Category:** Education **Rating:** 5.0/5 (5 ratings) **Price:** Free **Bundle ID:** com.canvas.Equal **Store:** Apple App Store **Country:** China **Version:** 3.1.8 (released 2026-10-07) **Original Release:** 2025-08-22 **Languages:** English, Arabic, Dutch, French, German, Hindi, Italian, Japanese, Korean, Polish, Portuguese, Russian, Chinese, Spanish, Swedish, Thai, Turkish, Vietnamese **App Store Link:** [Download on Apple App Store](https://apps.apple.com/cn/app/app/id6749845326) **AppTail Page:** [https://apptail.io/app/app-iRDw/china](https://apptail.io/app/app-iRDw/china) ## 恒等数学 Description 适合笔+iPad使用，目前的3.1.8版本可根据基础的点线面等元素快速画图以辅助理论探索，支持函数图像绘制 基础功能免费,但包含一些收费功能，联动点功能，隐圆和颜色块功能，新建超过5个文件夹，平面坐标系的弧度制显示，3D坐标系，向量箭头，参数方程，水滴上色等等 除了几何部分，便签功能也是核心之一，它可以固定在页面以显示最主要的步骤，多余且无用的笔迹可擦除避免牵扯精力 除此之外还有以下功能： 1、手写大写字母识别：主要是绘制几何图形时快速给顶点命名，如果关闭此开关则支持手写体的命名方式 2、导出图片到相册：一键导出，不带水印 3、从相册选择图片：一键导入，仅图片显示，不能识别。支持导入PDF文件。 4、点线面：根据需要选择即可。重点是可从页面某个图形的顶点拽出一个新点，可代替从菜单选择生成点元素。 5、套索工具：选取内容或激活处于锁定状态的几何元素，重点是点元素的选择，有三种方式：在点附近用套索画一条线、用套索画一条线经过点元素、用套索画一个小圈，圈住点元素。 6、上色水滴：可以给封闭的几何图形和区域上色，一定程度上能动态感知周围区域的变化 7、画布延展：随着笔迹的增加画布大小也会动态向四周延展 8、函数图像：可绘制一元表达式图像和参数方程 9、多点联动：支持多点联动，可在一定程度上探索几何多动点问题 10、3D坐标系：当前版本只增加了一个3D坐标系功能，支持在其中绘制点及设置空间坐标 11、3D几何图形：3棱柱，4棱柱，圆柱，圆锥，3棱锥，4棱锥 使用条款： ## 恒等数学 Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/96/33/f5/9633f503-1bee-5a6c-c83c-de98f727e13d/IMG_0122.PNG/2796x1290.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/fb/20/13/fb2013b3-532e-cceb-6e08-e6eae5b35840/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-05_at_11.34.59.png/2868x1320.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/b6/46/78/b646780e-80f5-e7d5-7df3-46cd8865e37f/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-29_at_15.45.38.png/1320x2868.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/29/0a/2c/290a2c10-bee5-7587-e8a5-84589613f09e/IMG_0114.PNG/1290x2796.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/69/34/bc/6934bc3c-d74b-4beb-662d-41ae2ca6de2a/IMG_0115.PNG/2796x1290.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/67/d7/30/67d73047-02cb-2f53-5bf1-9041206e4586/IMG_0118.PNG/2796x1290.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/86/8c/e8/868ce8d9-ee36-6813-c939-cf44e069ac60/IMG_0119.PNG/2796x1290.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/fe/e8/21/fee82126-54b4-ff3a-96a4-72e5013616ef/IMG_0120.PNG/2796x1290.png) - [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/d4/34/3e/d4343e30-6209-a658-3739-7ba127fc3a0b/_U622a_U5c4f_2026-06-22_01.19.22.jpg/2796x1290.png) - [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9f/6b/66/9f6b66d6-bb73-0baf-ea14-63767b32f30c/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-07-31_at_16.11.19.png/2868x1320.png) ## 恒等数学 Rating Breakdown in China - 5 stars: 5 (100%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 0 (0%) ## 恒等数学 Reviews in China ### ***** "画图方便" 方便画图 -- 画图方便, 2025-09-27 ### ***** "画图" 做题很方便 -- 糖墩烤地瓜, 2025-09-25 [View all 恒等数学 reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## 恒等数学 In-App Purchases | Item | Price | |------|-------| | 手写识别、几何图形旋转与折叠、颜色喷绘 | ¥22.00 | ## 恒等数学 Available In - 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