ReadFlow vs Fish Reading
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReadFlow
This app transforms PDF documents into a comfortable reading experience on small screens. It offers text reflow, customization options for fonts and themes, and iCloud sync for seamless access across devices. Enjoy reading PDFs as easily as other ebook formats.
- PDF text reflow for mobile
- Customizable fonts and themes
- Import custom font files
- iCloud sync
- PDF file cropping
- Metadata editing
- Generate and share reflowed text
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Designed for mobile reading! ReadFlow is a carefully crafted reading app for EPUB and PDF, made to feel refined, smooth, and close to reading on paper. For PDF, we built text reflow so small type and unclear scans are no longer a struggle on a phone. On iPhone Duo and iPad, dual-page reading is supported—like turning a real book. Key features: - EPUB reading with page-turn or scroll - PDF text reflow with page-turn or scroll, a preview wizard, automatic body-text detection, and multiple languages¹ - EPUB highlights, notes, and bookmarks - In-book search for EPUB and PDF - Custom font, size, and line spacing; import font files² - Reading themes that follow the system light/dark appearance - Dual-page reading on iPad landscape and foldable inner displays - iCloud sync with on-demand download to save storage and data - EPUB and PDF metadata editing (title, publisher, author, and more) - Export reflowed text as TXT and share³ - Library filters, favorites, and more fine details Free to download. ReadFlow Pro unlocks highlights/notes, reflow text export, and more via In-App Purchase / subscription. ¹ Auto-detect: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Spanish, Simplified Chinese, Traditional Chinese, Ukrainian, Thai, Vietnamese, Arabic ² Supported formats: otf, ttf ³ TXT is plain text—body only for now; table of contents, images, and other complex content are not supported yet Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://is.gd/TgnFzI
Fish Reading
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解决的核心问题: 在精读和泛读过程中,需要频繁切换工具打断阅读思路,难以快速定位感兴趣的内容,阅读思考难以有效沉淀。小鱼阅读提供完整的笔记、书签和备注系统,让您在不脱离阅读语境的情况下,快速导航到任意位置,有效记录阅读思考,并通过单词本功能在原文语境中学习词汇,全面提升阅读效率和体验。 会员服务: 购买会员可享受免广告体验,年度订阅 ¥15/年,支持自动续订和恢复购买。 隐私与安全: 我们重视您的隐私,用户笔记和阅读数据主要存储在本地设备,账号信息加密存储。我们不会向第三方分享您的个人数据。 用户服务条款: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ 立即开始您的精读和泛读之旅!
Screenshots
Verdict
The clearest difference is in-app purchases: Fish Reading at none against ReadFlow's 3. Fish Reading also leads on iOS requirement (16.6 vs 26.0). ReadFlow's advantage is ads (none vs shown). On price, update cadence 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
Both are free to download. ReadFlow sells 3 in-app purchases, starting at $0.99 per month. Fish Reading asks for nothing beyond the download.
ReadFlow ships an update every 10 days, Fish Reading every 3 weeks. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.
| Parameter | ReadFlow | Fish Reading |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 15 MB | 179 MB |
| Age rating | +4 | 17+ |
| Developer | 实 许 | 宇 方 |
In-app purchases
ReadFlow
- ReadFlow Pro 1x$0.991 Month
- ReadFlow Pro 12x$9.991 Year
- ReadFlow Pro ∞$19.99
Fish Reading
No in-app purchases





