Question 1

What is zeroStudy?

Accepted Answer

zeroStudy is a language learning tool that turns YouTube and Netflix into immersive classrooms. Click any subtitle word for instant translations, track vocabulary automatically, and review with spaced repetition — all without leaving your video.

Question 2

What languages can I learn with zeroStudy?

Accepted Answer

You can learn Korean, Japanese, Chinese (Mandarin), Spanish, French, German, and many more. zeroStudy works with any language that has subtitles on YouTube or Netflix.

Question 3

Is zeroStudy free?

Accepted Answer

Yes! zeroStudy has a generous free tier that includes unlimited video watching, quick lookups, and saving up to 100 words. The Pro plan unlocks unlimited word saving, AI explanations, advanced listening mode, and full analytics.

Question 4

How does the click-to-translate feature work?

Accepted Answer

While watching a video with subtitles, simply click on any word in the subtitle. A popup instantly shows the definition, pronunciation, and example usage. You can also select multiple words to look up phrases.

Question 5

What is the Reinforce feature?

Accepted Answer

Reinforce is zeroStudy's spaced repetition system. It automatically schedules reviews of words you've saved, showing them in the context of the original video. The algorithm calculates optimal review times so you remember words long-term with minimal effort.

Question 6

Do I need to install anything?

Accepted Answer

For YouTube and Netflix learning, install the free Chrome extension. For reviewing vocabulary on the go, download the zeroStudy mobile app on iOS or Android.

Question 7

How is zeroStudy different from traditional flashcard apps?

Accepted Answer

Unlike traditional flashcard apps, zeroStudy collects vocabulary automatically from real content you watch. Words are always shown in their original video context, making them easier to remember. There's zero manual card creation or deck maintenance.

Question 8

Does zeroStudy work on Netflix?

Accepted Answer

Yes! zeroStudy works on both YouTube and Netflix. On Netflix, you get the same click-to-translate subtitles, automatic vocabulary tracking, and subtitle translation features.

Question 9

Can I export my vocabulary to Anki?

Accepted Answer

Yes, Pro users can export their vocabulary list as CSV, which is compatible with Anki and other flashcard apps.

Question 10

What platforms does zeroStudy support?

Accepted Answer

zeroStudy is available as a Chrome browser extension for YouTube and Netflix, and as a mobile app on iOS and Android for vocabulary review.

Frequently Asked Questions