| 维度 / 指标 | ![]() | ![]() |
|---|---|---|
| 官方域名 | goodnotes.com | ubblu.com |
| 定价模式 | 免费增值,免费试用 | 免费 |
| 月访问量 | 322.73万 (3,227,341) | 2794 (2,794) |
| 月度环比流量变化 | +31.47万 (+10.8%) | +332 (+13.5%) |
| 主要市场与份额 | 🇺🇸 美国 (33.8%) | 🇺🇸 美国 (100%) |
| 直接访问 / 月 | 163.89万 | 1099 |
| 用户评分 | 4.4 | 4.2 |
| 支持的平台 | 网站 | 网站 |

手写笔记、PDF 批注与 AI 学习工具,都在同一块画布上
低延迟墨迹、防误触手掌识别、划掉即擦除以及手写转文字,让书写接近纸笔手感。
导入合同、论文或教材,用手直接标注,批注可搜索并可干净导出。
同时检索键入文本、手写与速写,并把笔记转成摘要、思维导图或结构化计划。
在共享笔记本、文档和白板上同时协作,不再有版本冲突或反复传文件。

少搜索,多创造
用自然语言提问,UBBLU 会从你的笔记、卡片、文件夹和标签中取出答案,而无需你翻找。
用 Notes 快速捕捉稍纵即逝的念头,用结构化的 Cards 展开更长的想法并沉淀为知识库。
用标签和文件夹整理,把常用内容置顶,并设置提醒,让截止日期和跟进事项不再遗漏。
UBBLU 会连接相关概念,并基于某个标签下归组的内容生成详细答案与洞察。
Knowt is a free study platform and the most popular Quizlet alternative, combining flashcards, note-taking, and AI study tools. Students can turn PDFs, lecture recordings, slides, and videos into flashcards, notes, and practice tests automatically.
专项更强将课程材料转变为互动式AI学习工具,不过对手写数字笔记本的关注相对较少。

专项更强Stronger online PDF editing and AI chat capabilities, but lacks tablet-optimized handwritten note-taking workflows.
专项更强Stronger online PDF editing and AI chat capabilities, but lacks tablet-optimized handwritten note-taking workflows.
专项更强Converts notes and PDFs into quizzes and flashcards, but lacks stylus-based handwriting and sketching tools.
专项更强Converts notes and PDFs into quizzes and flashcards, but lacks stylus-based handwriting and sketching tools.
专项更强ThetaWave AI is an AI note taker for students that captures live lectures and converts PDFs, slides, videos, YouTube links, and articles into structured notes, flashcards, quizzes, and mind maps — all in one study workspace.
专项更强ThetaWave AI is an AI note taker for students that captures live lectures and converts PDFs, slides, videos, YouTube links, and articles into structured notes, flashcards, quizzes, and mind maps — all in one study workspace.
为思维打造的工作室:以对象相连的笔记
专项更强Uses an infinite visual canvas for note organization, but lacks Goodnotes' paper templates and PDF annotation polish.