Comparison

RTL Fixer vs Readium

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

Head to head
About

RTL Fixer

This extension ensures right-to-left text displays correctly in AI chat interfaces without altering the overall layout. It intelligently handles mixed-language content and code blocks, offering a seamless experience for users of languages like Persian, Arabic, and Hebrew.

Highlights
  • Correct right-to-left text alignment
  • Preserves interface layout
  • Handles mixed-language content
  • Supports code blocks
  • Customizable site support
  • Local data processing
Features
Read full description

RTL Fixer fixes a small but constant frustration: every Safari extension I tried for right-to-left text in AI chat apps either did nothing, or flipped the entire interface and broke the sidebar, buttons, and input fields. So I built one that doesn't. When you write to Claude or ChatGPT or any site that you add in Persian, Arabic, Hebrew, or another right-to-left language, the reply renders with right-aligned text. When you write in English, the reply stays left-aligned. Code blocks always stay left-aligned. The interface itself never flips. HOW IT WORKS RTL Fixer only touches markdown content: paragraphs, list items, headings, blockquotes, table cells, and similar semantic elements. It never touches the sidebar, the message composer, or any other interface element. There are zero platform-specific selectors, so platform updates do not break it. Direction is detected using the first strong directional character in each paragraph. A paragraph that starts with English and contains Arabic stays left-aligned. A paragraph that starts with Persian and contains an English variable name stays right-aligned. Numbers, punctuation, and emoji are treated as neutral. SUPPORTED SITES - Claude (claude.ai) - ChatGPT (chatgpt.com) You can add any other site from the toolbar popup. Custom sites work the same way: enable the extension, type the hostname, and reload. PRIVACY RTL Fixer does not collect, transmit, or store any data. Everything happens locally in your Safari browser. There are no analytics, no advertising identifiers, no cookies, and no third-party SDKs. Your preferences (which sites you have enabled) are stored locally in Safari and never leave your device. The extension only runs on sites you have explicitly enabled, either from the built-in list or by adding them yourself. REQUIREMENTS - macOS with Safari 17 or later - iOS, iPadOS 17 with Safari LANGUAGES The extension itself is in English. The text it processes can be in any right-to-left language: Persian (Farsi), Arabic, Hebrew, Urdu, Yiddish, and others.

About

Readium

Features
Read full description

Turn PDFs, EPUB books, and web articles into a personal reading and listening library. Readium is a document reader and text-to-speech companion built for long reads, focused study, and hands-free listening. Import your own content, press play, and follow along as the current passage is highlighted. READ OR LISTEN YOUR WAY • Import PDF and EPUB documents • Save readable articles from the web • Listen with narration while following the text • Choose a voice and adjust playback speed • Move naturally between reading and listening KEEP IDEAS CLOSE • Highlight useful passages • Add notes without leaving the reader • Return to your saved reading position • Keep documents organized in one library LOCAL-FIRST BY DESIGN Your imported content, notes, highlights, and reading progress are stored locally on your device. Readium gives you a calm, focused space for reading, studying, and listening at your own pace.

Screenshots

RTL Fixer1 screens
Readium4 screens

Verdict

The call

The clearest difference is update cadence: RTL Fixer at every 3 weeks against Readium's every 2 months. Readium's advantage is iOS requirement (13.0 vs 15.4). 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

RTL Fixer ships an update every 3 weeks, Readium every 2 months. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
RTL Fixer versus Readium: the parameters behind the verdict, then further details
ParameterRTL FixerReadium
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.413.0 — better
Further details — not scored
Size1 MB112 MB
Age rating4+4+
DeveloperSHAHAB ALAMIAYZO

In-app purchases

None

RTL Fixer

No in-app purchases

None

Readium

No in-app purchases

Questions

Is RTL Fixer free?
RTL Fixer is free to download, with no in-app purchases.
Is Readium free?
Readium is free to download, with no in-app purchases.
Do RTL Fixer or Readium have ads?
Neither RTL Fixer nor Readium shows ads.
Which is updated more often, RTL Fixer or Readium?
RTL Fixer ships an update every 3 weeks, and Readium every 2 months. Most recently, RTL Fixer was updated on October 22, 2026 and Readium on October 9, 2026.

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