DejaVocab vs HeyReader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
HeyReader
Learn languages by reading real-world content. Subscribe to RSS feeds or import your own eBooks to practice vocabulary, understand complex sentences, and translate as you read. Enjoy a distraction-free, customizable reading experience.
- RSS feed subscriptions
- Import PDF & EPUB books
- Vocabulary highlighting & saving
- Smart sentence splitting
- Sentence & paragraph translation
- Adjustable fonts & night mode
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HeyReader is a multilingual reading app built around RSS subscriptions and imported eBooks, designed to help you learn English and other languages through real content. Subscribe to foreign-language websites, blogs, and news via RSS, or import your own PDF and EPUB books. HeyReader supports vocabulary highlighting, smart sentence splitting, and translation tools to make language learning natural and effective. Learn Languages Through Reading * Support for English and multilingual reading * Learn languages through real-world articles and books * Ideal for English learners and multilingual learners Read Content You Choose * Add your own RSS feeds * Read articles, blogs, and news in multiple languages * Learn from content that truly interests you Import PDF & EPUB Books * Read foreign-language PDF and EPUB eBooks * Learn through original books and study materials * Improve language skills in real context Build Vocabulary Naturally * Automatically highlight key words * Save words to your vocabulary list * Learn words and phrases in context Smart Sentence Splitting * AI-powered sentence segmentation * Understand long and complex sentences more easily Translation Support When Needed * Sentence and paragraph translation * Support comprehension without interrupting reading A Reading Experience Made for Language Learners * Adjustable fonts and text size * Night mode for comfortable reading * Clean and distraction-free interface Perfect for: * English learners * Multilingual learners * Anyone improving language skills through reading Turn everyday reading into real language learning with HeyReader. --- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://www.heyreader.com/terms.html Privacy Policy: https://www.heyreader.com/privacy.html
Screenshots
Verdict
The clearest difference is rating: HeyReader at 5.0 against DejaVocab's 4.6. HeyReader also leads on monetization model (free vs freemium) and review sentiment (100% vs 85%). DejaVocab's advantage is ratings volume (52 vs 3). On price, ads, in-app purchases and device support 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. DejaVocab sells 6 in-app purchases, starting at $5.99 per month and HeyReader sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
HeyReader holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: DejaVocab has 52 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 85% of DejaVocab's written reviews are positive against 100% of HeyReader's.
DejaVocab ships an update weekly, HeyReader every 3 days. The most recent releases landed on September 24, 2026 and September 14, 2026 respectively.
| Parameter | DejaVocab | HeyReader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (52 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 85.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 52 — better | 3 |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 292 MB | 13 MB |
| Age rating | 17+ | 4+ |
| Developer | 灏 龙 | Shandong Linhu Cultural Development Co., Ltd. |
Customer experience
DejaVocab
HeyReader
In-app purchases
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
HeyReader
- HeyReader Pro$4.991 Month
- HeyReader Pro Max$9.991 Month








