比較

Read Frog vs Immersive Translate

Both turn web pages and YouTube subtitles into side-by-side bilingual text. Read Frog is open source, translates selections for free, breaks down words and long sentences with AI and turns them into flashcards, from $3 a month.

最終更新：2026年10月5日

The short answer

Both are browser extensions, and both handle the basics: bilingual web pages, dual YouTube subtitles, translating a selection, and bringing your own API key or local model. Read Frog adds three things:

Built for learning a language

Select text to look up words or break down long sentences with AI, save them with the sentence they came from, and review them on a spaced-repetition schedule.

Free selection translation

Select text and see the translation, with no paid plan needed.

Open source, and cheaper

The code is public, and Pro is $3 a month, or $30 a year.

Bilingual web pages and videos

Read web pages and YouTube subtitles with the translation beside the original, and see a translation as soon as you select a sentence. These basics are free with the Google or Microsoft translator, or bring your own OpenAI, DeepSeek, Gemini or local model.

Feature comparison

	Read Frog	Immersive Translate
Bilingual web page translation	✓	✓
Dual YouTube subtitles	✓	✓
AI transcription for videos without subtitles	✓	✓
Selection translation	✓ (free)	✓ (paid plan)
Custom AI Actions, such as word lookup or Sentence Analysis	✓	Not in its feature list
Your own API key, or local models like Ollama	✓	✓
Save words to a notebook and review them as FSRS flashcards	✓	Not in its feature list
Open source	✓ (GPL-3.0)	No
Browsers	Chrome, Edge, Firefox	Chrome, Edge, Firefox, Safari

Immersive Translate's details come from its website, its GitHub README, its App Store listing and hands-on use, checked in October 2026.

What Read Frog adds

From reading to remembering

Immersive Translate is done once the page is translated. Read Frog keeps going:

Select a word or sentence on a page or in a video's subtitles and run an AI Action to look it up or break down a long sentence.
Save the result to Notebase in one click, together with the sentence it came from.
Add a card template to the notebase and your notes become flashcards; FSRS schedules each review by how well you remember the card.

Immersive Translate's own comparison concedes that vocabulary learning is better served by dedicated tools (see its comparison with Saladict). Read Frog builds that tool into the translator.

Open source, and your keys stay with you

Public code

Read Frog's code is public on GitHub, so anyone can check what it does to a page.

Settings stay local

Your API keys and settings stay in your browser and are never uploaded unless you turn on sync. See Privacy and Your Data.

Local models

To keep everything on your machine, connect Ollama or LM Studio and translate with a local model.

Pricing

	Read Frog	Immersive Translate
Free plan	✓	✓
Entry paid plan	Pro: $3 a month, or $30 a year	Pro: $9.99 a month, or $79.99 a year
Top plan	Ultra: $7 a month, or $70 a year	Max: $34.99 a month, or $289.99 a year

Immersive Translate's prices are from the App Store and may differ on its website and by region. See what each Read Frog plan includes on the pricing page.

Switching from Immersive Translate

Install Read Frog

Follow the installation guide. With both extensions on, a paragraph can get translated twice, so turn on page translation in only one of them.

Bring your model

Add the model you already use, such as OpenAI, DeepSeek, Gemini or Ollama, as described in Set Up Providers and API Keys, or start with the free Google or Microsoft translator.