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Read Frog vs Migaku

Migaku turns Netflix, YouTube and the web into flashcards for 11 languages, from $10 a month with no free plan. Read Frog translates pages, subtitles and selections for free in 179 languages, explains words and sentences with AI, and reviews what you save with FSRS, from $3 a month.

Last updated October 18, 2026

Migaku is a study tool: click words in subtitles and web pages, turn them into flashcards and review them, in 11 languages, from $10 a month with no free plan. Read Frog starts from reading: bilingual pages, dual subtitles and selection translation are free in 179 languages, and AI explanations, a notebook and FSRS review are there when you want to keep what you read. Open source; Pro is $3 a month.

Read first, then learn

Whole-page bilingual translation, dual subtitles on YouTube, X and Netflix, and selection translation are free with the Google or Microsoft translator, or bring your own OpenAI, DeepSeek, Gemini or local model. Select a word or sentence to have an AI Action explain it, and save the result to Notebase together with the sentence it came from.

Feature comparison

	Read Frog	Migaku
Languages	179, in any pair	11: Japanese, Chinese, Cantonese, Korean, Spanish, French, German, Italian, Portuguese, Vietnamese and English
Bilingual web page translation	✓free	Not in its feature list
Selection translation on any page	✓free	Word lookups with its dictionaries
Dual subtitles on YouTube, X and Netflix	✓free on captioned videos	Clickable subtitles on YouTube, Netflix, Disney+ and more
AI subtitles for videos without captions	✓Pro	✓YouTube subtitle generation, or import a subtitle file
AI explanations of words and sentences	✓Custom AI Actions, with your own prompts	✓ChatGPT explanations of a word in context
Known-word tracking and comprehension score	No	✓
Flashcards with spaced repetition	✓Notebase and FSRS	✓one-click cards with audio and screenshot, built-in SRS
Your own API key, or local models like Ollama	✓	Not in its feature list
Beginner courses	No	✓for some of its languages: the most common words and grammar first
Mobile apps	No	✓iOS and Android
Free plan	✓	No (10-day trial)
Open source	✓GPL-3.0	No
Browsers	Chrome, Edge, Firefox	Chrome

Migaku's details come from its website, its pricing page, its changelog and its Chrome Web Store listing, checked in October 2026.

What Read Frog adds

The page itself, in two languages

Migaku gives you a dictionary on every word. Read Frog gives you the whole page first, then the dictionary:

Turn on page translation and read the article, thread or documentation with the translation beside each paragraph, so you can read on and check yourself only when you need to.
Select a word or a long sentence and run an AI Action: a definition in context, a breakdown of the grammar, or any prompt you write yourself.
Save it to Notebase in one click. Add a card template and your notes become flashcards that FSRS schedules by how well you remember each one.

Who each one is for

Read Frog fits you if

You read articles, documentation or social feeds in a foreign language and want the translation beside the text, for free.
You learn a language Migaku doesn't cover, or switch between several.
You want to bring your own API key or run a local model, and read the code that handles your pages.
You'd rather start free and pay $3 a month once you need unlimited notes and reviews.

Migaku may fit better if

You're a beginner in a language its Academy courses cover and want a course before you touch native content.
You want built-in dictionaries, a known-word count and a comprehension score for every page and video.
You study on your phone: Migaku has iOS and Android apps, while Read Frog is a browser extension and a web app.
You'd rather pay once: Migaku sells a lifetime plan.

Pricing

	Read Frog	Migaku
Free plan	✓	No (10-day trial, no card needed)
Monthly	Pro: $3. Ultra: $7	$10
Yearly	Pro: $30. Ultra: $70	$96
Pay once	—	$240 on sale when we checked, list price $499

Migaku's prices are the US dollar prices on its pricing page on October 18, 2026; its iOS in-app prices are higher, and its discounts change often. See what each Read Frog plan includes on the pricing page.

Switching from Migaku

1
Install Read Frog
Follow the installation guide. Both extensions can stay installed; each adds its own lookups to pages and subtitles, so turn off one of them on sites where you use the other.
2
Pick a translator
Start with the free Google or Microsoft translator, or add the model you prefer, such as OpenAI, DeepSeek, Gemini or Ollama, as described in Set Up Providers and API Keys.
3
Save your first word
Select a word on a page or in a video's subtitles, run an AI Action, and save the result to a notebase. Add a card template and the review schedule starts.