Comparison

DeepEng vs DejaVocab

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

Head to head
About

DeepEng

This immersive learning tool uses a "language vector space" theory and multimodal neural network training to help beginners acquire English naturally, like a native language. Its "scene-voice-semantics" system enhances learning efficiency.

Highlights
  • Immersive learning approach
  • Language vector space theory
  • Multimodal neural network training
  • Scene-voice-semantics system
  • Natural language acquisition
  • Zero-beginner friendly
Features
Read full description

深度英语是一款基于“语言向量空间“理论研发的沉浸式学习工具,突破传统翻译式学习,通过多模态神经网络训练法, 让零基础学员像掌握母语般自然习得英语。我们提出的“场景-语音-语义“三位一体学习系统能够帮助学员提升效率。

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

DeepEng4 screens
DejaVocab4 screens

Verdict

The call

The clearest difference is review sentiment: DejaVocab at 86% against DeepEng's 60%. DeepEng's advantage is iOS requirement (15.1 vs 17.6). On price, update cadence, ads and in-app purchases 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. DeepEng sells 2 one-off in-app purchases 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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 8 level
DeepEng versus DejaVocab: the parameters behind the verdict, then further details
ParameterDeepEngDejaVocab
PriceFreeFree
Rating—4.5 (59 ratings) — better
Positive reviews60.0% of reviews86.4% of reviews — better
Number of ratings—59 — better
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.6
Further details — not scored
Size235 MB360 MB
Age rating17+17+
Developer成都麦田外科技有限公司灏 龙

Customer experience

DeepEng

Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

DejaVocab

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

In-app purchases

2 purchases

DeepEng

One-time2
  • 5天体验卡$7.99
  • 365天年卡$449.99
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 DeepEng free?
DeepEng is free to download, with in-app purchases available.
Is DejaVocab free?
DejaVocab is free to download, with in-app purchases available.
Do DeepEng or DejaVocab have ads?
Neither DeepEng nor DejaVocab shows ads.
Which is updated more often, DeepEng or DejaVocab?
DeepEng ships an update weekly, and DejaVocab weekly. Most recently, DeepEng was updated on October 8, 2026 and DejaVocab on October 15, 2026.

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