Comparison

Capacity vs DualView Translator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Capacity

Features
Read full description

Capacity lets you build and publish real web applications using AI — right from your iPhone. Describe what you want to create in plain language, and watch as AI writes the code in real time. Preview your web app live, refine it through conversation, and deploy to production — all without writing a single line of code. What you can build: Static websites and landing pages -Full-stack web apps with backend, database, and API A complete development environment in your pocket: -Real-time AI chat that builds your app as you watch -Live preview with desktop, tablet, and mobile views -Backend logs, database panel, and console -Supabase integration for production databases From idea to production in minutes: -Publish web apps to your own capacity.studio URL -Manage multiple projects from one dashboard

About

DualView Translator

This extension displays original text and translations side-by-side, allowing you to read foreign language content naturally. It offers multiple translation modes, automatic translation rules for specific sites, and AI summarization. Supports two translation engines and a clean, tabbed pop-up interface.

Highlights
  • Side-by-side dual-view display
  • 8 translation modes
  • Automatic translation rules
  • AI summary feature
  • Two translation engines (Google, DeepL)
  • Tabbed pop-up UI
Features
Read full description

DualView Translator is a Safari translation extension that displays the original text and translation side by side. Since the original text remains visible even after translation, you can read foreign-language articles and documents naturally while checking the context. ■ Key Features ・Dual-view display — Translations appear directly below the original text ・8 translation modes — Select-and-translate, full-page translation, element-select translation & summary, and more ・Automatic Translation Rules — Automatically translate specific sites based on URL patterns. Narrow down target elements using CSS selectors ・Translation Reset — Reset individual elements with the × button, or reset all at once ・Two Translation Engines — Google Translate (free) and DeepL (high quality) ・AI Summary Feature — Summarize translation results into 3–5 lines using Claude / Gemini ・Tabbed Pop-up — Clean UI that separates translation operations from settings ・UI Support for 11 Languages — Japanese, English, Chinese, Korean, French, German, Spanish, Portuguese, Russian, Arabic ・Dark / Light Theme — Automatically follows OS settings ■ Translation Modes 1. Select Translation — Simply select text to display the translation panel 2. Full Page Translation — Translate entire articles or documents in dual-view mode 3. Full-Page Translation & Summary — Displays an AI-generated summary in addition to the translation 4. Element Selection Translation — Click on specific elements on the page to translate them 5. Element Selection Translation & Summary — Click on an element to translate it and view an AI summary 6. Right-Click Translation (macOS only) — Select text, then right-click to translate instantly 7. Element Translation (macOS only) — Translate by block with a right-click 8. Element Translation & Summary (macOS only) — Translate and display an AI summary with a right-click ■ Translation Bar When you open a page in a foreign language, a translation bar automatically appears at the top of the screen. You can execute "Translate" or "Translate & Summary" with a single click. ■ Automatic Translation Rules Register frequently visited sites as rules, and automatic translation will run as soon as you open them. You can specify targets in detail using URL patterns and CSS selectors, and the tool includes an element picker feature that automatically generates selectors just by clicking on elements on the page. It also supports SPAs, dynamic content, webmail, and more. ■ About API Keys ・Google Translate: No API key required (default) ・DeepL: Set the API key obtained after free registration (Free up to 500,000 characters per month) ・Claude (Summary): Requires an Anthropic API key ・Gemini (Summary): Available using the free-tier API key from Google AI Studio API keys are stored only in the browser’s local storage and are never sent to our servers. Text to be translated is sent directly to the API of the selected engine; we do not receive or store it. ■ iOS Limitations Since iOS Safari does not support some parts of the Web Extension API (keyboard shortcuts, right-click menu), these features are automatically hidden. Page translation, selected text translation, area selection translation, and settings can all be accessed via pop-ups. ■ Privacy Please review our Privacy Policy for details. https://hirokatsuhibino.github.io/dualview-translator/privacy-policy.html

Screenshots

Capacity3 screens
DualView Translator4 screens

Verdict

The call

The clearest difference is update cadence: DualView Translator at weekly against Capacity's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Capacity ships an update every 3 months, DualView Translator weekly. The most recent releases landed on October 3, 2026 and October 15, 2026 respectively.

Scorecard1 real difference · 8 level
Capacity versus DualView Translator: the parameters behind the verdict, then further details
ParameterCapacityDualView Translator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.115.0 — better
Further details — not scored
Size31 MB1 MB
Age rating4+17+
DeveloperSamuel RondotHirokatsu Hibino

In-app purchases

None

Capacity

No in-app purchases

None

DualView Translator

No in-app purchases

Questions

Is Capacity free?
Capacity is free to download, with no in-app purchases.
Is DualView Translator free?
DualView Translator is free to download, with no in-app purchases.
Do Capacity or DualView Translator have ads?
Neither Capacity nor DualView Translator shows ads.
Which is updated more often, Capacity or DualView Translator?
Capacity ships an update every 3 months, and DualView Translator weekly. Most recently, Capacity was updated on October 3, 2026 and DualView Translator on October 15, 2026.

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