ReadFlow vs 口笛AI
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
口笛AI
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口笛AI是一款通用Agent，可以帮你完成各种任务、全栈应用开发、共享组件
Screenshots
Verdict
The clearest difference is in-app purchases: 口笛AI at none against ReadFlow's 3. 口笛AI also leads on update cadence (every 2 days vs every 20 months) and iOS requirement (13.4 vs 26.0). On price, ads 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. 口笛AI asks for nothing beyond the download.
ReadFlow ships an update every 20 months, 口笛AI every 2 days. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.
| Parameter | ReadFlow | 口笛AI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 20 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 14 MB | 29 MB |
| Age rating | 4+ | 17+ |
| Developer | 实 许 | bodongyueqian |
In-app purchases
ReadFlow
- ReadFlow Pro 1x$0.991 Month
- ReadFlow Pro 12x$9.991 Year
- ReadFlow Pro ∞$19.99
口笛AI
No in-app purchases
