Comparison

ReadEra vs Glass Book Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ReadEra

This app allows you to read and listen to books and documents in various formats, including PDF and EPUB. It offers text-to-speech functionality, customizable reading settings, and a built-in book manager for your library. Enjoy an ad-free and registration-free reading experience.

Highlights
  • Multi-format ebook support (EPUB, PDF, MOBI, DOCX, etc.)
  • Text-to-Speech (TTS) for listening to books
  • Ad-free and registration-free experience
  • Offline reading capabilities
  • Book manager with grouping and sorting
  • Customizable reading settings (themes, fonts, margins)
Features
Currently charting
Read full description

ReadEra - a book reader, allows you to read books for free, text to voice and listen to books for free, offline, in the PDF, EPUB, DOC, DOCX, RTF, MOBI, AZW3, CBZ, CBR, DJVU, FB2, TXT, ODT and CHM formats. No ads Read books and listen to books without ads. The ReadEra app for reading books and viewing PDF documents neither contains ads nor imposes internal purchases. No registration We’ve made a fast, reliable reader that doesn't compel users to use any specific services. The book reader works offline and is entirely free. Read books for free and listen to books for free (TTS), without limits! Text to Speech (TTS) Read text aloud with voice (TTS) – allows you to read text aloud and listen to all your books, PDF files and documents for free. With the Text to Speech (TTS) function, all your books and documents turn into audiobooks at the tap of the "Read aloud" button. TTS turns your book library into a personal audio library, making reading more flexible and enjoyable. This is especially useful for those who prefer the audio format or want to listen to books in situations where reading is impossible. You can read foreign books and at the same time listen to the pronunciation of words and sentences. You can choose a voice, adjust the speech speed, turn on repeating text to voice of the selected text, word or sentence. Listen to books and documents with ReadEra while doing your things – on the go, working out, before bed and even when sleeping. Read books of all formats ReadEra is a set of reading apps in one app, which reads well multiple types of formats: book Epub, Kindle (MOBI, AZW3), Fb2; business PDF, Djvu; office Microsoft Word (DOC, DOCX, RTF), ODT; text TXT and others. Reading books, viewing Microsoft Word documents and PDF files from zip archives. The reader for books, ReadEra, reads all popular formats of books, journals, articles and other documents in one app. Best book manager for your library Auto-detection of books and documents. Grouping books into lists: To Read, Have Read, Favorites. Sorting by name, file format, the last time read, etc. Quickly search for books, PDF files and documents in your library. Navigation through a book Quick access to reading settings, table of contents, your bookmarks, quotes, notes and other eBook options. Navigate through the book using the page index or the progress bar line. Convenient reading settings Auto-saving the current reading page. Comfortable color themes when reading books: day, night, sepia, console. Horizontal or vertical page flipping mode. Brightness and page margins adjustment, including PDF and DjVu. Separate settings for text and graphic formats. Adjustable type font, size, boldness, line spacing and hyphenation for Microsoft Word, Epub, Kindle (Mobi, Azw3), Fb2, TXT and ODT. Zoom in option for reading PDF and Djvu files. Quotes and Notes Create quotes and add notes to text. Highlight text in books, PDF files and documents, add personal notes to the highlighted text. A well-thought-out and simple algorithm for working with quotes and notes. All your quotes and notes in a book are conveniently gathered in one place—in the “About Document” section. Bookmarks Add bookmarks to save your favorite spots in books with a single tap. Just tap the upper-right corner while reading to quickly add a bookmark. All bookmarks for the book are conveniently gathered in one place—in the "About Document" section. Text Translation ReadEra supports integration with the iOS system “Translate” app for seamless text translation. Instantly translate text in books, PDFs, and documents using the built-in translator on your device. Read books and Listen to books easily and for free with ReadEra!

About

Glass Book Reader

This app reads your DRM-free e-books aloud using your device's built-in voices. It can display the current, previous, and next line of text on compatible smart glasses, highlighting the spoken word.

Highlights
  • Reads DRM-free EPUB, PDF, TXT files
  • Audio playback using system voices
  • Displays text on Meta Ray-Ban smart glasses
  • Highlights spoken words on glasses
  • Headphone/AirPod/touchpad controls
  • Adjustable reading speed and sync
Features
Read full description

Glass Book Reader reads your own e-books aloud with the voices built into iOS and, if you own Meta Ray-Ban Display glasses, shows the previous, current and next line on the glasses with the spoken word highlighted. • Import DRM-free EPUB, text PDF and TXT files, or start with the built-in sample. • Reading uses the system voices on your iPhone — nothing is sent to the cloud. • Three lines on the glasses: the line being read in the middle, the word being spoken highlighted. • Control reading from headphones, AirPods or the glasses touchpad: play/pause, next and previous page. • Resume where you left off; pick a voice, speed and reading area; adjust audio/text sync. • English and Simplified Chinese text and interface. Meta glasses are optional: without them, Glass Book Reader reads on the phone with a three-line preview. Showing text on glasses requires the Meta AI app and a one-time approval of Glass Book Reader in it. No accounts, no analytics, no servers. Your books stay on your phone.

Screenshots

ReadEra4 screens
Glass Book Reader4 screens

Verdict

The call

The clearest difference is rating: Glass Book Reader at 5.0 against ReadEra's 4.2. Glass Book Reader also leads on update cadence (every 2 weeks vs every 2 months). ReadEra's advantage is ratings volume (239 vs 1) and chart position (#90 vs unranked). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Glass Book Reader holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: ReadEra has 239 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

ReadEra ships an update every 2 months, Glass Book Reader every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 6 level
ReadEra versus Glass Book Reader: the parameters behind the verdict, then further details
ParameterReadEraGlass Book Reader
PriceFreeFree
Rating4.2 (239 ratings)5.0 (1 ratings) — better
Positive reviews60.0% of reviews—
Number of ratings239 — better1
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#90 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.2
Further details — not scored
Size62 MB22 MB
Age rating4+4+
DeveloperREADERA EOODRed Shore Tech

Customer experience

ReadEra

All ratings231 ratings
Positive74.9%
Neutral11.7%
Negative13.4%
Written reviews275 reviews
Positive60.0%
Neutral17.5%
Negative22.5%

Glass Book Reader

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

ReadEra

Reported bugs

3 issues
  • Unexpected page jumps or scrolling issues
  • Compatibility problems with certain file formats
  • Inconsistent behavior when minimizing or locking the screen

Requested features

5 requests
  • Add text-to-speech functionality
  • Implement highlighting, annotation, and lookup features
  • Introduce cloud sync and cross-device syncing
  • Expand font and theme options
  • Add search within documents

Glass Book Reader

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ReadEra

No in-app purchases

None

Glass Book Reader

No in-app purchases

Questions

Is ReadEra free?
ReadEra is free to download, with no in-app purchases.
Is Glass Book Reader free?
Glass Book Reader is free to download, with no in-app purchases.
Which has better reviews, ReadEra or Glass Book Reader?
Glass Book Reader is rated higher. ReadEra averages 4.2 out of 5 from 239 ratings, while Glass Book Reader averages 5.0 from 1 ratings.
Do ReadEra or Glass Book Reader have ads?
Neither ReadEra nor Glass Book Reader shows ads.
Which is updated more often, ReadEra or Glass Book Reader?
ReadEra ships an update every 2 months, and Glass Book Reader every 2 weeks. Most recently, ReadEra was updated on October 30, 2026 and Glass Book Reader on October 31, 2026.

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