DexSpeak vs Castlingo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DexSpeak
Improve English fluency by reading authentic texts and analyzing vocabulary in context. Build personalized word lists and review them with spaced repetition to gain deeper language intuition.
- Contextual reading of authentic texts
- Interactive vocabulary analysis
- Personalized word collections
- Spaced repetition review
- Deeper language intuition development
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You understand English. Now make it feel natural. DexSpeak helps you learn English in English, through books, articles and videos that interest you. Spend less time translating in your head and more time following the story. KEEP READING English explanations appear between the lines. When you look up a word, get the meaning that fits the context, explained simply. Learn one meaning at a time. LISTEN AND WATCH Listen to your books with high-quality text-to-speech and audiobook support. Follow real videos and hear how English expressions work in context. KEEP THE WORDS AND THEIR STORIES Save words and expressions you want to remember. Return to the sentences where you found them: recall the context first, then the meaning. SEE YOUR READING ADD UP Follow your reading journey, one book at a time. Look back at your reading with progress and statistics. Your interests. Your English. Your pace. Plans and purchases DexSpeak Pro offers monthly and yearly auto-renewing subscriptions, plus a one-time Lifetime purchase. Lifetime does not auto-renew. Prices and available plans are shown in the app for your App Store region. Payment is charged to your Apple Account when you confirm a purchase. Monthly and yearly subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Renewal is charged within 24 hours before the end of that period. You can manage or cancel subscriptions in your Apple Account settings. Terms: https://www.dexspeak.com/terms Privacy: https://www.dexspeak.com/privacy
Castlingo
Learn English through engaging YouTube videos and AI-generated podcasts with meticulously crafted bilingual subtitles. Practice pronunciation, build vocabulary with interactive games, and master sentence structures for natural language acquisition.
- Bilingual subtitles with word-level karaoke
- AI-generated daily podcasts with 5-pass listening method
- Interactive vocabulary games
- Sentence structure explanations
- Global search for videos and podcasts
- Offline audio playback
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Castlingo 把 油管上最好的英语视频按你感兴趣的话题装进口袋 —— 真实的访谈、演讲、播客,带字字精修的双语字幕。看视频学英语,戴上耳机就能开始。 【六大分类,按兴趣看】 不再被算法乱推。我们每天扫描 YouTube 上最值得看的英语内容,按话题分好类: - 娱乐 · 文化:Hot Ones / Vogue / Vanity Fair / WIRED - 两性 · 心理:Matthew Hussey / Jay Shetty / School of Life - 思想 · 访谈:TED / Andrew Huberman / Tim Ferriss / Diary of a CEO - 科普 · 科学:Veritasium / Kurzgesagt / 3Blue1Brown - 创业 · 商业:Y Combinator / Stanford / Acquired - 科技 · 评测:MKBHD 【字字精修的字幕】 - 中英双语字幕,焦点行高亮,跟视频自动滚动 - 词级 karaoke:每个单词在被说出的瞬间亮起,跟读时机精准 - 不认识的词点一下,加入生词本,例句翻译一应俱全(Pro) - 锁屏 / 后台继续听音频,进度永不丢 【AI 每日播客 · 5 遍循环法】 真实视频之外,还有为学习设计的 AI 每日播客。基于"可理解输入"假说,同一段对话听 5 遍: - 英语 3 遍熟悉语感 - 母语翻译 1 遍理解内容 - 英语 1 遍巩固记忆 【词汇小课堂·6 国场景】 美、英、澳等 6 国真实生活场景(银行开户、看医生、点单……)的实用词汇课,配场景插画,点单词即听纯正发音。每一课还能「模拟现场对话」,和虚拟角色一来一往把学到的词用出来。 【句型讲解·227 条地道表达】 每天从播客里提炼母语者张口就来的地道句型:读音跟读、字面意思、什么场景什么情绪该用、3-4 个真实例句,六段式讲透——让你形成语感条件反射,而不是「中译英」。 【练起来,记得牢】 · 词义配对 / 连词成句 / 场景模拟三种小游戏,边玩边练 · 生词自动进词汇本,按遗忘曲线提醒复习 · 连续打卡火苗、成就徽章,坚持有反馈 Castlingo Pro 解锁全部内容: - 完整双语字幕 + 词级 karaoke 跟读 - 点词查词 + 无限保存生词 - 完整 5 遍循环(免费版 4 遍) - 全部句型讲解(免费版每日 1 个) - 无限练习游戏 - 每日无限集数 订阅自动续费,可在 App Store 账户设置中随时取消。 隐私政策:https://amyhuang13506-svg.github.io/LangPod/docs/privacy.html 用户协议:https://amyhuang13506-svg.github.io/LangPod/docs/terms.html
Screenshots
Verdict
The clearest difference is review sentiment: DexSpeak at 100% against Castlingo's 50%. DexSpeak also leads on rating (5.0 vs 4.3) and ads (none vs shown). Castlingo's advantage is update cadence (every 4 days vs every 9 days). On price, in-app purchases, monetization model 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. DexSpeak sells 3 in-app purchases, starting at $5.99 per month and Castlingo sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.
DexSpeak holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 9 and 3 respectively. Written reviews point the same way: 100% of DexSpeak's written reviews are positive against 50% of Castlingo's.
DexSpeak ships an update every 9 days, Castlingo every 4 days. Both last shipped on October 24, 2026.
| Parameter | DexSpeak | Castlingo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (9 ratings) — better | 4.3 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 9 — better | 3 |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 509 MB | 30 MB |
| Age rating | 17+ | 4+ |
| Developer | Zihan Lin | 支涛 黄 |
Customer experience
DexSpeak
Castlingo
In-app purchases
DexSpeak
- DexSpeak Pro Monthly$5.991 Month
- DexSpeak Pro Yearly$49.991 Year
- DexSpeak Lifetime$119.99
Castlingo
- Castlingo Pro (Monthly)$12.991 Month
- Castlingo Pro (Yearly)7 Days trial$99.991 Year









