About
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.
What's New in Castlingo
1.4.6
July 22, 2026
优化了一些bug
Subscription plans
Castlingo Pro (Yearly)
Unlock all Castlingo Pro features
Developer apps
FAQ
What is Castlingo's learning methodology?
Castlingo uses a combination of authentic YouTube videos with detailed bilingual subtitles and AI-generated daily podcasts. The AI podcasts employ a '5-pass listening method' to improve comprehension and language feel, alongside sentence structure explanations and vocabulary games.
How does Castlingo's subtitle feature work?
Castlingo offers meticulously refined bilingual subtitles that scroll automatically with the video. It includes word-level karaoke highlighting, allowing users to see and practice pronunciation precisely as words are spoken. Users can tap on unknown words to add them to a vocabulary list.
What are the benefits of the AI Daily Podcast feature in Castlingo?
The AI Daily Podcast is designed for learning based on the 'comprehensible input' hypothesis. It features a 5-pass listening method: three passes in English to familiarize with the language, one in the native language for understanding, and a final English pass for reinforcement. This aims for passive absorption and building language intuition.
How does Castlingo help with vocabulary building?
Castlingo incorporates vocabulary building through interactive games like 'word matching' and 'sentence construction'. Words learned are added to a personal vocabulary book and are reinforced through spaced repetition, with words automatically entering a review cycle if not practiced for 30 days.
What content is available in the free version of Castlingo?
The free version of Castlingo provides access to a portion of the content, including 4 passes of the AI daily podcast, one sentence structure explanation per day, and limited vocabulary game practice. Full access to features like word-level karaoke and unlimited vocabulary saving requires a Pro subscription.
Can I use Castlingo offline?
Yes, Castlingo allows you to continue listening to audio from videos and podcasts even when the screen is locked or the app is in the background, ensuring your progress is saved and you can utilize fragmented time for learning.
How often is Castlingo updated?
The latest version of Castlingo is 1.3.5, and it was last updated on June 24, 2026. The app is actively maintained, suggesting regular updates to improve features and content.
What devices does Castlingo support?
Castlingo is currently supported on iPhones. The app is designed for iOS devices, allowing users to learn English on their mobile phones.