DeepEng vs DejaVocab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Immersive learning approach
- Language vector space theory
- Multimodal neural network training
- Scene-voice-semantics system
- Natural language acquisition
- Zero-beginner friendly
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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。
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.
- 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
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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
Verdict
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
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.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | DeepEng | DejaVocab |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (59 ratings) — better |
| Positive reviews | 60.0% of reviews | 86.4% of reviews — better |
| Number of ratings | — | 59 — better |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 235 MB | 360 MB |
| Age rating | 17+ | 17+ |
| Developer | 成都麦田外科技有限公司 | 灏 龙 |
Customer experience
DeepEng
DejaVocab
In-app purchases
DeepEng
- 5天体验卡$7.99
- 365天年卡$449.99
DejaVocab
- 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
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- DejaVocab 专业版年付7 Days trial$69.991 Year
- DejaVocab 共建者$199.99
- DejaVocab 共建者 Plus$299.99








