Shinkansen Web Translator

Name: Shinkansen Web Translator
Author: Zhimin Su

iOS app by Zhimin Su. Productivity · Zhimin Su

Store rating: 0 / 5
Store rating count: 0
Download price: Free to download
In-app purchases: Unknown
Version: 2.5.0
Listing last refreshed: 2026-09-16

Store description excerpt

Shinkansen is a fast, smooth, privacy-first Safari translation extension for web pages and YouTube subtitles, built for iPhone and iPad. Three things make it different: • Watch the page start turning into your target language within one second of pressing translate (Instant Translation, Gemini engine) • Text is replaced in place — fonts, sizes, colors, and layout are preserved; links, bold, and italics survive untouched • You bring your own API key; every setting lives on your own device; your reading never touches a third-party server [Built for iPhone & iPad] • Four-finger tap any web page to toggle translation (tap again to restore) — no keyboard needed • Hardware keyboard shortcuts when an external keyboard is attached • First-launch onboarding walks you through your Gemini API key and a default translation method [Languages] Translate into 8 target languages. The extension UI is available in the same 8 languages — pick independently or follow your system language. [Features] • Multiple translation engines: Google Gemini (best-quality AI, requires API key), Google Translate (free, no API key), and any OpenAI-compatible model, cloud or self-hosted • Single-language overlay / bilingual side-by-side modes — one-click toggle, with 4 visual treatments for the bilingual layout • Free Chinese variant conversion: built-in dictionaries convert between Simplified and Traditional Chinese locally — no API key, works offline; auto-convert on page load is on by default • YouTube subtitle translation: automatic detection and real-time replacement; styling matches native captions; bilingual subtitles available; youtube.com/live/ stream links supported • YouTube AI smart segmentation: auto-generated captions are re-segmented by AI for natural full sentences • Adjustable YouTube subtitle size, readable even in full screen • Custom translation shortcuts: bind a key to each of the three presets, recorded on the settings page • Auto-translate specific sites: add domains and they translate on load • Cross-tab continuity: opening a link from a translated page auto-translates the new tab with the same preset • Translation cache + live cost report: cached content is free next time; a notification shows token count and cost • Custom glossary with CSV import (two columns: source,translation) with room for hundreds of entries, blocked-word list, and on-page translation editing • Respects the page's do-not-translate markup: marked names and codes stay untouched and are never sent to the API; icon-font glyphs are never turned into text • Send to Instapaper: save the whole translated article to Instapaper in one click [Bring your own API key] Shinkansen doesn't sell translation as a service — you bring your own Google Gemini API key for AI translation. Gemini's free tier means everyday use is typically free. Prefer no key? The Google Translate engine works free with no setup, and Chinese variant conversion runs entirely offline. Step-by-step setup is in the GitHub

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