Question 1

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 2

Is zeroStudy free?

Accepted Answer

Yes! zeroStudy has a generous free tier that includes unrestricted video watching, 100 quick lookups per day, and saving up to 100 words. Pro raises the quick lookup and word-saving limits and unlocks AI explanations, advanced listening mode, and full analytics.

Question 3

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 4

What do I need to install on my computer?

Accepted Answer

Install the free zeroStudy browser extension in Chrome. You do not need to install a separate desktop app. Once installed, zeroStudy works on supported YouTube and Netflix pages.

Question 5

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 6

Do Pro members need to buy additional AI credits?

Accepted Answer

Usually not. Pro and Lifetime plans include 500 AI explanations and translation for 100,000 source characters each day—enough for several hours of video learning. Most users will not need to buy additional credits. You only need them if you use the day's included allowance and want to keep using AI features immediately.

Question 7

Can I use zeroStudy on Android and iOS devices?

Accepted Answer

Due to mobile platform limitations, the zeroStudy mobile app currently supports only Reinforce and other vocabulary-review features and cannot be used to watch videos. If you want to learn with videos on a phone or tablet, use a mobile browser that supports browser extensions. Install the zeroStudy browser extension, then open the desktop version of the video website. On Android, you can use Quetta Browser; on iPhone and iPad, you can use Orion Browser.

Frequently Asked Questions