Comparison

FOSS eBooks vs LingoTail

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

Head to head
About

FOSS eBooks

Access and read your FOSS educational eBooks offline with this interactive reader. Enjoy features like portrait/landscape viewing, thumbnail navigation, and listen to audio narration on supported titles.

Highlights
  • Offline eBook access
  • Portrait and landscape view
  • Thumbnail navigation
  • Audio narration on select products
  • Interactive learning
Read full description

FOSS eBooks is an interactive eBook reader app for users of FOSS (Full Option Science System) educational products. With FOSS eBooks you can: ・Download your FOSS eBooks and access them offline, where and when you choose ・Select portrait or landscape view with thumbnail-based navigation ・Listen to audio of the text on select products

About

LingoTail

This app helps you learn English by creating personalized AI flashcards from any word or phrase. It integrates with videos, books, and audiobooks to enrich your vocabulary with real-life usage examples and spaced repetition for long-term retention.

Highlights
  • AI-powered flashcard creation
  • Video and subtitle integration
  • Vocabulary saving from media
  • Adapted reading content
  • Spaced repetition system (SRS)
  • Personalized vocabulary decks
Features
Read full description

Turn words you discover into vocabulary you remember. LingoTail is your personal vocabulary builder, dictionary, and flashcard app. Save words and phrases from books, videos, conversations, or everyday life. AI adds meanings, translations, and examples, so you can focus on understanding and remembering them. Learn with words that matter to you, in the language you choose. • SAVE WORDS AND PHRASES Type or paste a word or phrase and save it with a tap. Build a personal dictionary around what you read, watch, hear, and want to learn. • LET AI ADD THE CONTEXT Get clear definitions, translations, and example sentences automatically. Understand what a word means and how to use it without creating every flashcard by hand. • LEARN THROUGH EXAMPLES Explore example sentences with translations. Watch video examples when available to see how words and phrases are used in context. Listen to pronunciation as you learn. • REMEMBER WITH SPACED REPETITION Review your vocabulary with simple flashcards. Tap to reveal the meaning and swipe to mark a word as reviewed. Spaced repetition brings words back at scheduled intervals to help you remember them over time. • ORGANIZE YOUR VOCABULARY Keep words together in collections: a book you’re reading, phrases for travel, vocabulary for work, or anything else you want to explore. Search your saved words whenever you need them. • CHOOSE YOUR LANGUAGES Choose the language you’re learning and the language you want for translations. Build your vocabulary beyond English. Whether you’re learning a language, reading in another language, or collecting useful expressions, LingoTail keeps your words and your practice together. Find a word. Save it. Make it part of your vocabulary. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lingotail.com/privacy

Screenshots

FOSS eBooks4 screens
LingoTail4 screens

Verdict

The call

The clearest difference is review sentiment: LingoTail at 100% against FOSS eBooks's 40%. LingoTail also leads on rating (5.0 vs 2.2) and update cadence (weekly vs every 2 months). FOSS eBooks's advantage is in-app purchases (none vs 6) and ratings volume (57 vs 2). On price, ads 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. LingoTail sells 6 in-app purchases, starting at $1.99 per 7 days. FOSS eBooks asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

LingoTail holds the better App Store score, 5.0 against 2.2. That said, the two scores are not equally well evidenced: FOSS eBooks has 57 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 40% of FOSS eBooks's written reviews are positive against 100% of LingoTail's.

UpkeepUpdate frequency

FOSS eBooks ships an update every 2 months, LingoTail weekly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

Scorecard7 real differences · 3 level
FOSS eBooks versus LingoTail: the parameters behind the verdict, then further details
ParameterFOSS eBooksLingoTail
PriceFreeFree
Rating2.2 (57 ratings)5.0 (2 ratings) — better
Positive reviews40.0% of reviews100.0% of reviews — better
Number of ratings57 — better2
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better16.4
Further details — not scored
Size139 MB63 MB
Age rating4+4+
DeveloperHurix Systems Pvt. Ltd.Boris Verigin

Customer experience

FOSS eBooks

All ratings57 ratings
Positive29.8%
Neutral1.8%
Negative68.4%
Written reviews20 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

LingoTail

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

FOSS eBooks

No in-app purchases

6 purchases

LingoTail

Subscriptions3
  • LingoTail Premium – Weekly$1.997 Days
  • LingoTail Premium – Monthly$8.991 Month
  • LingoTail Premium – Yearly7 Days trial$69.991 Year
One-time3
  • Coin Pack — 100 Coins$0.99
  • Coin Pack — 500 Coins$1.99
  • Coin Pack — 1000 Coins$2.99

Questions

Is FOSS eBooks free?
FOSS eBooks is free to download, with no in-app purchases.
Is LingoTail free?
LingoTail is free to download, with in-app purchases available.
Which has better reviews, FOSS eBooks or LingoTail?
LingoTail is rated higher. FOSS eBooks averages 2.2 out of 5 from 57 ratings, while LingoTail averages 5.0 from 2 ratings.
Do FOSS eBooks or LingoTail have ads?
Neither FOSS eBooks nor LingoTail shows ads.
Which is updated more often, FOSS eBooks or LingoTail?
FOSS eBooks ships an update every 2 months, and LingoTail weekly. Most recently, FOSS eBooks was updated on November 2, 2026 and LingoTail on November 5, 2026.

Other comparisons