
72
BU Score
Strong
Librera: EPUB & PDF Reader
✍️ BU Analytics Review
“
Librera: EPUB & PDF Reader is an Android app from Librera in the Books & Reference category, currently rated 4.1★ across 136,360 ratings. Initial signal reads as mixed reviews — supporters praise core features while critics cite stability/value gaps.
Our BU Score puts it at 72 — Strong (healthy traction). For a Books & Reference app, that means healthy traction.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 3 of 3 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| High install base (136,360 ratings)METRIC | +$12,000 | |
| Good rating (4.1★)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v9.3.75🔄 updated 2w ago📂 Books & Reference💰 Free
📝 About this app
<b>Librera Reader</b> is a light-weight and free book reading application that will devour almost any e-book format one can throw at her: <b>PDF, EPUB, EPUB3, MOBI, DJVU, FB2, FB2.ZIP, TXT, RTF, AZW, AZW3, HTML, ODT, XPS, CBZ, CBR, TIFF, PDB, MHT and OPDS Catalgos.</b>
It also supports reading <b>out loud, using whatever TTS engine</b> installed on your device.
The application is just under 14MB, with the <b>feature-rich and highly customizable interface</b>
to ensure a most <b>comfortable reading</b> experience one can imagine on an Android device.
Librera Reader is intended as an <b>all-in-one replacement</b> for all your reading apps.
<b>Just switch to Librera Reader and never look back!</b>
Moreover, it's constantly under heavy development with the ultimate goal to <b>implement all the wishes of its users.</b>
Librera: boasting 10+ million installations!
<b>Book Reader Interface</b>
✔ Modern reading design
✔ Change theme and accent colors
✔ Night or daytime theme (Substratum friendly)
✔ Book display as a list or grid
✔ Change the size and look of book covers
✔ Library search
✔ Favorites list
✔ Recent list
✔ Notes and bookmarks in all formats
<b>Bookshelf (Library)</b>
✔ Search for EPUB, FB2, PDF, etc. documents and create a library
✔ Add and remove folders
✔ Filtered book search: by title, author, series, genre, etc.
✔ Book display sorting: by author(s), genre, series, size, etc.
✔ Open folders w/ image assortments as books (bookbinding)
<b>Reading settings</b>
● Change background and font colors
● Solid and textured backgrounds (work for all formats, even PDF and DjVu)
● Select fonts for text, titles, italics, etc.
● Change reading direction (LTR, RTL)
● Intelligent white space cropping
● Night mode
● Lock page in place to disable accidental dragging
● Accurate PDF text reflow
● Page splitting
● Multi-word text search
● Honored document's CSS styles for EPUB, AZW, AZW3 and MOBI books
● Contents presentation in the form of nested hierarchy
● Commenting and drawing in PDF files
● Thumbnailed page display in Go To
● Open password-protected PDF documents
● Accurate multi-line text selection w/ draggable handles
● Manual brightness adjustment (+auto-brightness setting)
● Configurable tap-zones
● Text alignment, indents, line spacing, additional fonts
● RSVP speed reading for all supported formats
<b>Unique mode for musicians</b>
● Automatically scroll sheets at an adjustable speed
● Fast transition between previous and next sheet
● Return to the first sheet
● Notes and drawings
● Bookmarks
<b>Learning foreign languages</b>
● Listen to audio files within Librera (internal media player)
● Read aloud (using stock and custom Text-To-Speech engines)
● Dictionary lookup (installed dictionaries: GoldenDict, ABBYY Lingvo, ColorDict, etc.)
● Online search for word meanings and passage translations (GTranslate, Dictionary.com, Oxford, Longman, Cambridge, Collins, Merriam-Webster, Vdict, etc.)
<b>PDF reader and PDF viewer</b>
● Find all PDF documents on the device
● File manager, cover view
● Changing the document's background
● Day and night theme
● Notes, comments, and bookmarks
● Automatic scrolling at an adjustable speed
● Voice reading (TTS Reader)
● Opening of password-protected documents
● Page splitting
● Option to prevent accidental page dragging
<b>Comic book reader and comic book viewer</b>
● CBZ, CBR formats (CBZ Reader)
● Thumbnail view
● Remember reading position on book close or/and exit
<b>Advanced</b>
● Opening any book (epub, fb2, mobi, pdf) packed in zip-format
● Opening documents in emails, file managers, and other sources
● Exporting notes to a file or an email
● Export and import book and app settings (automatic)
● Widget on the desktop
● Page sharing as image
● Support for offline Calibre libraries (search, meta-data, covers)
● EPUB3 multimedia support (video and audio)
● Office doc formats LibreOffice, OpenOffice (ODT, RTF)
● Support for online book Catalogs (Gutenberg, Manybooks) search and download
It also supports reading <b>out loud, using whatever TTS engine</b> installed on your device.
The application is just under 14MB, with the <b>feature-rich and highly customizable interface</b>
to ensure a most <b>comfortable reading</b> experience one can imagine on an Android device.
Librera Reader is intended as an <b>all-in-one replacement</b> for all your reading apps.
<b>Just switch to Librera Reader and never look back!</b>
Moreover, it's constantly under heavy development with the ultimate goal to <b>implement all the wishes of its users.</b>
Librera: boasting 10+ million installations!
<b>Book Reader Interface</b>
✔ Modern reading design
✔ Change theme and accent colors
✔ Night or daytime theme (Substratum friendly)
✔ Book display as a list or grid
✔ Change the size and look of book covers
✔ Library search
✔ Favorites list
✔ Recent list
✔ Notes and bookmarks in all formats
<b>Bookshelf (Library)</b>
✔ Search for EPUB, FB2, PDF, etc. documents and create a library
✔ Add and remove folders
✔ Filtered book search: by title, author, series, genre, etc.
✔ Book display sorting: by author(s), genre, series, size, etc.
✔ Open folders w/ image assortments as books (bookbinding)
<b>Reading settings</b>
● Change background and font colors
● Solid and textured backgrounds (work for all formats, even PDF and DjVu)
● Select fonts for text, titles, italics, etc.
● Change reading direction (LTR, RTL)
● Intelligent white space cropping
● Night mode
● Lock page in place to disable accidental dragging
● Accurate PDF text reflow
● Page splitting
● Multi-word text search
● Honored document's CSS styles for EPUB, AZW, AZW3 and MOBI books
● Contents presentation in the form of nested hierarchy
● Commenting and drawing in PDF files
● Thumbnailed page display in Go To
● Open password-protected PDF documents
● Accurate multi-line text selection w/ draggable handles
● Manual brightness adjustment (+auto-brightness setting)
● Configurable tap-zones
● Text alignment, indents, line spacing, additional fonts
● RSVP speed reading for all supported formats
<b>Unique mode for musicians</b>
● Automatically scroll sheets at an adjustable speed
● Fast transition between previous and next sheet
● Return to the first sheet
● Notes and drawings
● Bookmarks
<b>Learning foreign languages</b>
● Listen to audio files within Librera (internal media player)
● Read aloud (using stock and custom Text-To-Speech engines)
● Dictionary lookup (installed dictionaries: GoldenDict, ABBYY Lingvo, ColorDict, etc.)
● Online search for word meanings and passage translations (GTranslate, Dictionary.com, Oxford, Longman, Cambridge, Collins, Merriam-Webster, Vdict, etc.)
<b>PDF reader and PDF viewer</b>
● Find all PDF documents on the device
● File manager, cover view
● Changing the document's background
● Day and night theme
● Notes, comments, and bookmarks
● Automatic scrolling at an adjustable speed
● Voice reading (TTS Reader)
● Opening of password-protected documents
● Page splitting
● Option to prevent accidental page dragging
<b>Comic book reader and comic book viewer</b>
● CBZ, CBR formats (CBZ Reader)
● Thumbnail view
● Remember reading position on book close or/and exit
<b>Advanced</b>
● Opening any book (epub, fb2, mobi, pdf) packed in zip-format
● Opening documents in emails, file managers, and other sources
● Exporting notes to a file or an email
● Export and import book and app settings (automatic)
● Widget on the desktop
● Page sharing as image
● Support for offline Calibre libraries (search, meta-data, covers)
● EPUB3 multimedia support (video and audio)
● Office doc formats LibreOffice, OpenOffice (ODT, RTF)
● Support for online book Catalogs (Gutenberg, Manybooks) search and download
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Librera: EPUB & PDF Reader
- Developer
- Librera
- Bundle ID
- com.foobnix.pdf.reader
- App Store URL
- Open in App Store
- Category
- Books & Reference
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- Not found
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $2.7K/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
More by Librera
View all →EPUB Reader for all books
★ 4.3 · 28,976 reviews
PDF Reader - PDF, DJVU Viewer
★ 4.1 · 15,435 reviews
PDF Reader: PDF Viewer+Folders
★ 4.3 · 13,769 reviews
eBook Reader: all in one
★ 4.5 · 8,395 reviews
TTS Reader - reads aloud books, all books!
★ 3.9 · 4,303 reviews
Librera PRO - eBook and PDF Reader (no Ads!)
★ 4.5 · 3,797 reviews
Browse BU Analytics
📚 All 55,000+ Books
🜍 Alchemy & Hermeticism
🔮 Magic & Ritual
🌙 Witchcraft & Paganism
⭐ Astrology & Cosmology
🃏 Divination & Tarot
📜 Books & Reference
✡️ Kabbalah & Jewish Mysticism
🕉️ Mysticism & Contemplation
🕊️ Theosophy & Anthroposophy
🏛️ Freemasonry & Secret Societies
👻 Spiritualism & Afterlife
📖 Sacred Texts & Gnosticism
👁️ Supernatural & Occult Fiction
🧘 Spiritual Development
📚 Esoteric History & Biography
Info
About BU Analytics 



