ULSA DRM vs LaziBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ULSA DRM
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ULSA DRM là ứng dụng đặt mượn, đọc sách của Thư viện Trường Đại Học Lao Động - Xã Hội
LaziBook
Transform your ebooks into audiobooks with natural-sounding voices, all processed on your device. Enjoy offline listening, customizable playback, and advanced reading features for various file formats.
- On-device audiobook generation
- Offline listening
- Customizable voices and playback speed
- Supports multiple ebook and comic formats
- Page highlighting and self-turning
- Background sound themes
- On-device translation
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LaziBook turns every book you own into an audiobook. Open EPUB, PDF, Kindle, Word files or comics and listen in natural voices — speech is generated right on your iPhone or iPad, with no internet, no account and no ads. LISTEN • Tap Listen and reading starts from the page you are on; the current sentence is highlighted, each word lights up as it is spoken, and pages turn by themselves. Tap any sentence to read from there. • Keeps reading with the screen locked, with controls on the Lock Screen, Dynamic Island and headphones. • Background sound: 18 music themes and 12 ambient sounds (rain, a flowing stream, campfire…) that play along with the voice. • A separate voice for dialogue, custom pronunciations for any word, and Speak for any selected passage. • Speed 0.75–2×, sleep timer and an Up Next queue; export audiobooks as M4B with chapters. VOICES ON YOUR DEVICE • 30 Vietnamese voices from the North, Centre and South, each in two editions: Turbo, with expressive 48 kHz audio (iPhone 13 / SE 3 and later, iPads with A15 or M1), and Nano, light and battery-friendly on every device. When Turbo can't keep up or the device is hot, LaziBook switches to the matching Nano voice so playback never stalls. • 10 English voices. LaziBook picks the right voice for the language of each book and each sentence. • Studio: preview every voice, add pauses and emotions, write multi-voice scripts and save them as MP3 with cover art. • Create your own voice from 5–8 seconds of recording — processed entirely on your device, never uploaded, synced through iCloud. BOOKS THAT LOOK THE PART • Book effect with page edges, spine and pages that curl under your finger; two pages on a landscape iPad, or vertical scrolling. • Cover templates: 6 layouts, 8 styles, 6 palettes each — design a beautiful cover from your own picture; books without a cover get one that suits their genre. • Clean Up & Convert: rewrite a book as a tidy EPUB 3 laid out like an edited edition — red chapter titles, a large initial letter, rebuilt contents, spelling fixes; turn TXT, Word, Kindle and text PDFs into EPUB 3, or export an A5 PDF to print. • Six light and dark themes; highlights in five colours, notes, bookmarks and a Notebook; footnotes open in place. LOOK UP AND TRANSLATE • Look up a word or a whole passage with Lazidi (Vietnamese, English, Chinese, Japanese): select a passage for its word list and tap a word for its meaning; or use the built-in Dictionary. Pinyin and Sino-Vietnamese readings above Chinese characters. • Translate English, Chinese, Japanese and Korean books into Vietnamese on your device: read side by side, sentence by sentence, or listen to the translation; Chinese names follow their Sino-Vietnamese readings. Works offline after a one-time download (about 440 MB). PDFS AND COMICS • PDFs keep their original printed layout, with the current sentence highlighted on the page; scanned books and photographed pages are recognized on your device so they can be read aloud. • Comics in CBZ, CBR, CB7, CBT and PDF: right-to-left reading for manga, vertical scrolling for webtoons. LIBRARY • 15 formats: EPUB, PDF, MOBI, PRC, AZW, AZW3, DOCX, TXT, RTF, Markdown, FB2, CBZ, CBR, CB7, CBT. • Add books from Files, Google Drive, Dropbox, OPDS servers (Calibre, Komga, Kavita…), or paste a Wikisource, Project Gutenberg or story-site link; Free Books to listen right away. • Books live in iCloud Drive › LaziBook, shared with your iPad and Mac; reading positions, highlights, notes, covers and custom voices sync through your own iCloud. • Quick Find, book status, smart shelves, reading and listening statistics with a daily goal; widgets and a Read button for Control Center. PRIVACY No account, no ads, no tracking. Your books, notes and custom voices stay on your device and in your own iCloud. Note: DRM-protected books cannot be opened. On-device translation requires an iPhone or iPad with an A13 chip or later and at least 4 GB of RAM.
Screenshots
Verdict
The clearest difference is iOS requirement: ULSA DRM at 14.0 against LaziBook's 17.0. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ULSA DRM | LaziBook |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (9 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | — | Daily |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 94 MB | 679 MB |
| Age rating | 4+ | 4+ |
| Developer | D&L Technology Integration And Consulting Joint Stock Company | Pham Hung |
In-app purchases
ULSA DRM
No in-app purchases
LaziBook
No in-app purchases









