Comparison

Context vs DejaVocab

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Context

This AI-powered tool helps you learn English naturally through context. It focuses on acquiring vocabulary and phrases from your own reading, offering AI-assisted explanations for grammar and word meanings. The app aims to make learning more engaging and effective by integrating with your personal learning notes.

Highlights
  • AI-powered vocabulary acquisition
  • Contextual word explanations
  • AI-assisted grammar analysis
  • DeepListen audio review
  • Import web links, text, and EPUB
  • Personalized learning notes management
  • Flashcard-style word review
Read full description

# App Store 编辑推荐 App # Context - 基于语境学英语的 AI 工具 ————————— Context 是结合二语习得理论开发的一款基于语境学英语的 iOS / iPadOS app,从日常的阅读自然习得单词短语等表达方式的学习工具。 Context 2.0 融合了二语习得的一些核心理念: - 通过自然阅读语境提供可理解输入; - 通过重复遇到生词促进自然记忆; - 结合AI 辅助讲解语法、词义、短语搭配,降低情绪焦虑,增强理解; - 未来将会支持输出练习(如仿写、翻译练习),强化输入到输出的闭环。 相比与大多数仅提供单词列表让用户通过固定的顺序和节奏进行反复记忆的应用, Context 更加注重通过从用户自己的阅读场景中收集单词,在实际的运用/语境中「习得」它们。在使用 Context 的阅读过程中,在查询生词的同时可以将上下文保存下来,并与之关联。因此, Context 中是没有独立存在的单词或短语,必须是基于用户自己积累的语境存在。 研究数据表明,亲身经历的真实语境的记忆留存率是远高于陌生例句。 在 Context 复习时,回到收集语境时的原场景中去学习这些生词,像 native speaker 一样在真实场景中真正学会单词及其使用。由于语境和单词本身来源都是自己感兴趣的英语内容,所以学起来也会更加轻松有趣有动力。长期从自己日常记录的语境中积累词汇以及词汇的使用和表达,最终实现无障碍阅读自己感兴趣的英语内容。并利用笔记本管理所收集的内容,搭建高效英语学习笔记体系。 ------ 主要功能包括: 【你可能不认识的词】 在阅读过程中停下来去查词或写笔记都会中断阅读,增加阅读的难度;并且词典给出的释义可能无法直接代入到原文中,需要自己根据原文再次理解。2.0 版本中我们结合 AI 增加了“推荐生词”、“单词描述”、“AI 自动选择单词在语境中的释义”等功能,把句子放到 Context 中,不需要手动查词即可查看生词的释义以及描述,帮助你沉浸阅读、理解单词的语境中的意思。 【语境分析】 当遇到长难句或包含一些习语或固定搭配等短语时,理解句子的难度就更大了,这时可以试试“语境分析”功能,AI 会根据语境原文分析句子结构、提示需要注意理解的短语等等,精读练习的好帮手~ 【 DeepListen】 与常见的“播放句子”功能不同,AI 会朗读你收集句子和生词;并在需要时补充生词短语的解释,就像老师带你一起回顾。 有了音频,学习不再只停留在屏幕上。听的是你阅读时收集的词句,你对内容熟悉且难度更小,每条大约 30 秒,轻量又容易坚持。 这样,复习变得更自然,也更容易融入日常生活。 【学习功能】 我们调研发现,几乎所有英语学习者都会将希望自己学会的内容收集到笔记本上,但是由于笔记工具(纸质/电子)的局限性在于难以整理查找和学习,导致最后笔记积累的很多但是真正会学到脑子里的很少。Context 想做的就是让你的英语笔记不再吃灰(这里的笔记包含收集的生词、语料、语法等) Context 会加入一些被动学习的环节,在“收集”的过程中你也无意间多次复习了笔记,对生词加深印象,久而久之你收集下来希望自己学会的知识就已经学到脑子里了。 - 例如当你在不同语境重复查同一个词时,会展示你过去遇到这个词时的语境,也就是说你每一次遇到这个词时,你都在无意间做了一次复习。 - 将来还会加入:AI 给出的例句、英文的单词描述、出题内容等会优先使用你收集过的生词等功能,支持更多这样被动学习的场景~ 在 Context 中我们会将隐性习得和显性习得结合,最终希望做到只要一直在使用 Context,无论你是否有主动学习回顾,你记录的笔记就是进了你的脑子。突然哪天遇到或者需要表达时,可能就脱口而出了。 2.0 将会开始逐步完善学习功能,目前已经加入了生词回顾功能,以 flash card 的形式,回到语境中回顾生词。将来会结合 AI 加入更多学习功能,例如 AI 结合你收集的生词和句子生成一篇短文、翻译练习、AI 场景对话等。 【导入文章】 在当前版本中,支持导入网页链接、纯文字、epub - 其他收集语境方式: 从其他 app 粘贴、拖拽、手动输入等方式收集你的语境 【其他功能】 单词学习:基于语境,查看学习单词的“辨析”、“助记”等 ———————————— Context 官方公众号/B站/小红书/微博:@ Context AI 驱动的语境学习法 联系邮箱:support@okr.vision 同时,App Store 的评论对我们来说非常重要,如果 Context 给您带来了价值与帮助,希望能写个五星评价!大家的建议和意见我们都会第一时间回复。这也将是我们不断努力的动力~再次感谢! ———————————————— 小红书/微信公众号: Context - AI 驱动的语境学英语工具 联系我们:support@okr.vision 用户协议:https://social-tenure-159376.framer.app/context/agreement 隐私政策:https://social-tenure-159376.framer.app/context/policy

About

DejaVocab

This app helps you learn languages by immersing you in real-world content like videos, podcasts, and books. It builds a personal language corpus by capturing and organizing language chunks from natural input, allowing you to review words within their original context. The system integrates spoken and written language for a continuous learning experience.

Highlights
  • Learn from videos, podcasts, and audiobooks
  • Build a personal language corpus
  • Review vocabulary in original context
  • Integrates spoken and written language
  • Supports EPUB, PDF, and text files
Features
Read full description

Deja 从一个问题开始: 语言,为什么总是被学成抽象的单词? 在真实世界中,语言来自视频、播客、阅读和声音。 Deja 将这些语境中的表达自动提取、组织,逐渐形成一个属于自己的语料系统。 复习不再是孤立的记忆,而是回到语言第一次出现的那个语境。 阅读、听力、学习不再分离,所有输入汇聚成一条连续的语言路径。 Deja 不属于某一种格式或平台,它试图构建的,是一个会随着使用不断生长的语言系统。 Deja starts with a simple idea: Language is not learned from isolated words, but from real usage. Import videos, podcasts, books, or any text. Deja automatically captures phrases in context and turns scattered exposure into a growing personal corpus. Review is not repetition. It is a return to the moment where the language first made sense. Reading, listening, and studying are no longer separated. Everything flows into one continuous system, one evolving memory. Deja is not about formats or platforms. It is about building a language system that grows with you. Contact WeChat: longhao1596 Discord Community: https://discord.gg/AC7sNMJW Privacy Policy: https://dejavocab.com/privacy-policy/ Subscription Information Subscriptions renew automatically 24 hours before the end of the current period You can manage or cancel your subscription in Apple ID settings at any time After cancellation, access remains until the end of the current subscription period Payment will be charged to your iTunes account upon confirmation of purchase Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Don’t let words slip past unnoticed. Let DejaVocab capture every meaningful chunk of language. Download DejaVocab and build your own language corpus.

Screenshots

Context4 screens
DejaVocab4 screens

Verdict

The call

Context and DejaVocab both sit at 4.5 stars, but that hides the real split: 86% of DejaVocab's written reviews are positive against 58% of Context's. DejaVocab also leads on ratings volume (59 vs 13). On price, rating, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Context sells 2 in-app purchases, starting at $9.99 per month and DejaVocab sells 6 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Context against 4.5 for DejaVocab. Both are backed by a comparable volume of ratings — 13 and 59 respectively. Written reviews are what separate them: 58% of Context's written reviews are positive against 86% of DejaVocab's.

UpkeepUpdate frequency

Context ships an update every 6 days, DejaVocab weekly. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

Scorecard2 real differences · 8 level
Context versus DejaVocab: the parameters behind the verdict, then further details
ParameterContextDejaVocab
PriceFreeFree
Rating4.5 (13 ratings) — better4.5 (59 ratings)
Positive reviews58.3% of reviews86.4% of reviews — better
Number of ratings1359 — better
Update frequencyEvery 6 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size57 MB360 MB
Age rating4+17+
DeveloperChengdu Visionary Co., Ltd.灏 龙

Customer experience

Context

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews24 reviews
Positive58.3%
Neutral20.8%
Negative20.8%

DejaVocab

All ratings59 ratings
Positive86.4%
Neutral1.7%
Negative11.9%
Written reviews66 reviews
Positive86.4%
Neutral4.5%
Negative9.1%

In-app purchases

2 purchases

Context

Subscriptions2
  • Plus 月度$9.991 Month
  • Plus 年度$39.991 Year
6 purchases

DejaVocab

Subscriptions4
  • DejaVocab 高级版3 Days trial$5.991 Month
  • DejaVocab 高级版3 Days trial$7.991 Month
  • DejaVocab 高级版年付7 Days trial$49.991 Year
Show 1 more
  • DejaVocab 专业版年付7 Days trial$69.991 Year
One-time2
  • DejaVocab 共建者$199.99
  • DejaVocab 共建者 Plus$299.99

Questions

Is Context free?
Context is free to download, with in-app purchases available.
Is DejaVocab free?
DejaVocab is free to download, with in-app purchases available.
Which has better reviews, Context or DejaVocab?
Context is rated higher. Context averages 4.5 out of 5 from 13 ratings, while DejaVocab averages 4.5 from 59 ratings.
Do Context or DejaVocab have ads?
Neither Context nor DejaVocab shows ads.
Which is updated more often, Context or DejaVocab?
Context ships an update every 6 days, and DejaVocab weekly. Most recently, Context was updated on October 21, 2026 and DejaVocab on October 20, 2026.

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