Lucid Reader vs Yomu
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Lucid Reader
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Lucid Reader โ A Streamlined PDF Viewer for Focused Reading Lucid Reader gives you a clean, distraction-free way to read PDFs โ whether they're standard documents or books you've scanned yourself. No clutter, no complexity. Just your PDF and you. *** Key Features *** โข Two-Page Spread โ Read like a real book, with an optional standalone cover page. โข Flexible Binding โ Switch between right-to-left or left-to-right binding, perfect for Japanese-style books and manga. โข Optimized Display โ Fine-tune the display area and zoom independently for the left and right pages to maximize space and trim away margins. โข Intuitive Page Navigation โ Turn pages effortlessly with a tap or a swipe, with customizable tap zones. โข Page Lock โ Keep your view exactly where you set it and prevent accidental shifts. โข Full-Screen Mode โ Fully immerse yourself with a distraction-free view. โข Collections โ Group multiple files together for tidy, organized reading. โข iCloud Storage โ Offload files to iCloud to reclaim space on your device. *** Effortless File Access *** Open PDFs in seconds: โข Tap the + icon in the top-right corner of the file list, or โข Choose "Save to Lucid Reader" from the share menu in any other app. *** Secret Mode โ Enhanced Privacy (In-App Purchase) *** โข Create more collections โข Protect your sensitive files with advanced privacy tools: โข File Hiding โ Swipe right on any file and tap Secret to hide it from the list. โข Restricted Access โ Hidden files stay concealed until you unlock them with Face ID / Touch ID, keeping them private even if someone glances at your screen. โข App Switcher Privacy โ Secret-mode PDFs are blurred when switching apps, so your private content stays hidden even on the multitasking screen. โข End-to-End Encryption โ Encrypt secret files with a password directly on your device. Your files remain unreadable without your password, even if your iCloud storage is accessed. Experience the perfect balance of simplicity and control. Lucid Reader is built for one thing โ hassle-free PDF reading.
Yomu
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Yomu is a reader for iPhone and iPad built for heavy scanned and self-scanned PDFs. Convert self-scanned books, scanned handouts, and technical or class-material PDFs into .yom, a reading-optimized format, and page through them fast โ a reader built to focus on reading. [Key Features] โข Blazing-fast page rendering Smooth, stress-free reading even with heavy scanned PDFs and large documents. โข Full-text search, even for scans Build an index and jump straight to matching pages. Image-only scanned PDFs are made searchable with on-device OCR. โข Two-page spreads and reading direction Choose left-to-right or right-to-left, with full two-page spread support. โข Comfortable reading adjustments Shadow reduction at page edges and color inversion for dark reading. โข Everything runs on device Conversion, search, and reading all run on device โ your content is never sent to a server. Read offline anytime. โข Simple one-time purchase Add up to 2 books for free. Adding a 3rd requires a single one-time purchase โ no subscription, no recurring charges. Terms of Use: https://yomu.juntaki.com/terms/ Privacy Policy: https://yomu.juntaki.com/privacy-policy/
Screenshots
Verdict
The clearest difference is update cadence: Lucid Reader at every 3 weeks against Yomu's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Lucid Reader sells 1 one-off in-app purchase and Yomu sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Lucid Reader ships an update every 3 weeks, Yomu every 4 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.
| Parameter | Lucid Reader | Yomu |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks โ better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details โ not scored | ||
| Size | 7 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Satoshi Takezawa | Jumpei Takiyasu |
In-app purchases
Lucid Reader
- Pro Mode$0.99
Yomu
- Yomu Pro Monthly$3.991 Month
- Yomu Pro Yearly$29.991 Year
- Yomu Unlimited$9.99








