Comparison

Oju vs Dark Surf

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

Head to head
About

Oju

Features
Read full description

Transforming "I Can't Read" into "Learning" on the Spot. News, academic papers, social media, foreign books— The biggest obstacle to learning English is having to switch apps every time you encounter an unfamiliar word, which breaks your concentration. This app utilizes advanced character recognition technology to directly connect every word on the screen to your intelligence. ■ Three Core Features to Accelerate English Learning ・In-Screen AI OCR & Instant Translation Scan areas of interest while browsing. Eliminates the need to switch to a dictionary app, allowing you to read smoothly while maintaining context. ・Never Miss Text in Images and Videos Uses the standard iOS/macOS analysis engine. Accurately extracts text from social media posts that cannot be copied, subtitles in videos, and text in PDF documents. ・Multilingual Support for Over 20 Languages Supports the latest language engines supported by the OS, including English, Chinese, and Korean. Always provides highly accurate translation and recognition. *Supported languages ​​vary depending on the OS version. Certainly! I have translated the tables into English and cleaned up the duplicates for you. ## Supported Languages | Language | Browser Code | Translation Code | | :--- | :--- | :--- | | English (US) | `en-US` | `en` | | English (UK) | `en-GB` | `en` | | Japanese | `ja-JP` | `ja` | | Chinese (Simplified) | `zh-Hans` | `zh-Hans` | | Chinese (Traditional) | `zh-Hant` | `zh-Hant` | | Cantonese | `yue-Hant` | `yue` | | Korean | `ko-KR` | `ko` | | French | `fr-FR` | `fr` | | German | `de-DE` | `de` | | Italian | `it-IT` | `it` | | Spanish | `es-ES` | `es` | | Portuguese | `pt-BR` | `pt` | | Russian | `ru-RU` | `ru` | | Ukrainian | `uk-UA` | `uk` | | Thai | `th-TH` | `th` | | Vietnamese | `vi-VN` | `vi` | | Indonesian | `id-ID` | `id` | | Turkish | `tr-TR` | `tr` | | Polish | `pl-PL` | `pl` | ### New in iOS 26 | Language | Browser Code | Translation Code | | :--- | :--- | :--- | | Dutch | `nl-NL` | `nl` | | Arabic | `ar-SA` | `ar` | | Hindi | `hi-IN` | `hi` | | Danish | `da-DK` | `da` | | Norwegian | `nb-NO` | `nb` | | Swedish | `sv-SE` | `sv` | ■ Enjoy even greater comfort on larger screen devices ・iPad / Mac: The large screen allows for in-depth learning by displaying the original text and translation side-by-side. ・iPhone: Due to screen size, single-screen mode (not split-screen mode) is recommended. ■ Recommended for: ・Those who want to efficiently read the latest news and technical articles from overseas. ・Those who want to learn "authentic expressions" directly from social media and videos. ・Those who want to enter a reading flow state without being interrupted by the hassle of "looking things up." ■ Terms of Use https://www.anotherbrain.co.jp/terms/oju

About

Dark Surf

Enhance your browsing experience with a customizable dark theme for Safari. Adjust shade, contrast, saturation, and image settings. Schedule dark mode or set it per-site.

Highlights
  • Customizable dark theme
  • Adjustable shade and contrast
  • Saturation and image handling
  • Scheduling for dark mode
  • Per-site theme controls
  • Preset themes (Midnight, Warm, AMOLED, Gray)
Features
Read full description

Dark Surf gives Safari a thoughtful dark mode for every website. Instead of painting over pages, Dark Surf reads each site’s own design and rebuilds it in the dark. Backgrounds and cards turn deep and calm, text stays crisp, and the colors that carry meaning, like buttons, links, warnings and highlights, keep their character. Photos stay natural. SMART BY DEFAULT • Leaves websites that already have a dark design alone • Keeps dark logos, icons and formulas visible • Keeps text on top of photos readable • Handles modern websites built with CSS variables, Tailwind, Bootstrap and web components MAKE IT YOURS • Six themes: Midnight, Ocean, Dim, Warm, Graphite and true-black AMOLED • Build your own palette from any colors • Fine-tune brightness and contrast, and choose how images look • See every change instantly in a live preview that runs Safari’s own Dark Surf engine YOUR RULES • Switch any website between Dark, Invert and Off right from Safari • Keep lists of websites that are always dark, inverted or never themed • Follow a schedule or your device’s Dark Mode, or pause for an hour PRIVATE BY DESIGN Pages are recolored on your device. Dark Surf has no account, no analytics, no ads and no tracking, and never sends the pages you visit to anyone. Dark Surf is a Safari extension. After installing, turn it on in Settings › Apps › Safari › Extensions. The app shows you how.

Screenshots

Oju4 screens
Dark Surf4 screens

Verdict

The call

The clearest difference is in-app purchases: Dark Surf at none against Oju's 2. Dark Surf also leads on ads (none vs shown). Oju's advantage is update cadence (daily vs every 4 months). On price, device support and iOS requirement 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. Oju sells 2 in-app purchases, starting at $1.99 per month. Dark Surf asks for nothing beyond the download.

UpkeepUpdate frequency

Oju ships an update daily, Dark Surf every 4 months. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 6 level
Oju versus Dark Surf: the parameters behind the verdict, then further details
ParameterOjuDark Surf
PriceFreeFree
Rating—3.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyDaily — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size9 MB6 MB
Age rating17+17+
DeveloperAnotherBrain Inc.Vali Mikayilov

In-app purchases

2 purchases

Oju

Subscriptions2
  • Premium Monthly$1.991 Month
  • Premium Yearly$19.991 Year
None

Dark Surf

No in-app purchases

Questions

Is Oju free?
Oju is free to download, with in-app purchases available.
Is Dark Surf free?
Dark Surf is free to download, with no in-app purchases.
Do Oju or Dark Surf have ads?
Oju shows ads; Dark Surf does not.
Which is updated more often, Oju or Dark Surf?
Oju ships an update daily, and Dark Surf every 4 months. Most recently, Oju was updated on October 25, 2026 and Dark Surf on October 31, 2026.

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