Comparison

XtremeLabs eReader vs tsundoku reader

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

Head to head
About

XtremeLabs eReader

Features
Read full description

Just launched! A full featured cloud-based e-reader application for reading and working with digital training materials. Built by XtremeLabs, the award-winning company behind the original XtremeLabs hands-on labs and XtremeLabs Marketplace (XLM), XtremeCourseware is the platform for technology students and learning organizations to read and engage with the courseware they need to pass certification exams, in college courses, or for self-study. The app comes in a stunning new design, refreshing eBook Interface, book download capabilities and a host of features to enhance your learning. It seamlessly integrates eBooks with videos, synched audios, image banks and interactivities for an engaging eBook reading experience.

About

tsundoku reader

This app offers a free, universal EPUB reader optimized for quick Japanese reading. It features an integrated, powerful Japanese dictionary and customizable reading settings for an enhanced on-the-go experience.

Highlights
  • Universal EPUB reader
  • Integrated Japanese dictionary
  • Paginated and continuous scroll modes
  • Autosave and progress tracking
  • Customizable font size and themes
  • Toggleable furigana
  • Vertical/horizontal text direction
Features
Read full description

tsundoku reader is the first universal EPUB reader app designed with quick-and-easy Japanese reading at the forefront, for free. Gain access to a powerful Japanese dictionary in milliseconds with the tap of any word. tsundoku is designed to revolutionize on-the-go reading, making any book both quick and convenient. Stop scrolling and start reading today, for free, forever. ______________________ Custom EPUB Reader tsundoku uses a custom EPUB renderer optimized for iOS. Read on your phone similar to a book by using paginated mode, allowing you to swipe between pages as though you’re flipping through, or scroll smoothly through your book with continuous scrolling mode. Powerful Japanese Dictionary Other free reading apps don’t have an integrated dictionary. Specialized reading devices are slow, their dictionaries aren’t thorough, and you always have to carry it with you. With tsundoku, you gain access to JMDict, one of the most complete dictionaries around, in addition to Kanji data from the Kanjidic project, and pitch accents from Wadoku, all in your phone. With the tap of a word, you’ll learn everything there is to know about any word. Autosave and progress tracking tsundoku is designed to be on-the-go. That’s why we prioritize automatic progress saving on every book, always. tsundoku will always track your progress, and wait for you where you last left off. Customizable settings tsundoku is designed to be customizable, to suit your needs for any book in any language. Customize font size, line height, font, paginated and continuous scroll modes, and reader theme. With Japanese, gain access to toggleable furigana, and change between vertical and horizontal text direction. ______________________ Check out the official tsundoku webpage: https://www.evansyu.com/projects/tsundoku Changelog: https://www.evansyu.com/projects/tsundoku/changelog Privacy Policy: https://www.evansyu.com/projects/tsundoku/privacy

Screenshots

XtremeLabs eReader4 screens
tsundoku reader4 screens

Verdict

The call

The clearest difference is update cadence: XtremeLabs eReader at weekly against tsundoku reader's every 5 months. XtremeLabs eReader also leads on iOS requirement (14.0 vs 16.0). 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

XtremeLabs eReader ships an update weekly, tsundoku reader every 5 months. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
XtremeLabs eReader versus tsundoku reader: the parameters behind the verdict, then further details
ParameterXtremeLabs eReadertsundoku reader
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyWeekly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.0
Further details — not scored
Size70 MB207 MB
Age rating4+4+
DeveloperXtremeLabs LLCEvans Yu

In-app purchases

None

XtremeLabs eReader

No in-app purchases

None

tsundoku reader

No in-app purchases

Questions

Is XtremeLabs eReader free?
XtremeLabs eReader is free to download, with no in-app purchases.
Is tsundoku reader free?
tsundoku reader is free to download, with no in-app purchases.
Do XtremeLabs eReader or tsundoku reader have ads?
Neither XtremeLabs eReader nor tsundoku reader shows ads.
Which is updated more often, XtremeLabs eReader or tsundoku reader?
XtremeLabs eReader ships an update weekly, and tsundoku reader every 5 months. Most recently, XtremeLabs eReader was updated on October 10, 2026 and tsundoku reader on October 9, 2026.

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