FLOOX reader vs Simply Fluent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FLOOX reader
This app uses the RSVP method to significantly increase reading speed and comprehension. It presents words one at a time, making reading more engaging and less tiring on the eyes. Regular use can improve overall reading habits and concentration.
- RSVP speed reading method
- Supports EPUB, MOBI, FB2, PDF, TXT, HTML
- Automatic link loading
- Adjustable reading speed and delays
- Contextual word display
- Customizable colors and RTL support
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Have you ever wanted to read some book, but it felt like it needed too much time and was simply boring? FLOOX will make reading much faster and much more fun (once you get a hang of it ;) It is based on RSVP (Rapid Serial Visual Presentation) method, which has been scientifically proven to increase the reading speed by 33% while retaining the same comprehension level (G. Öquist, M. Goldstein). While most speed-reading techniques require a lot of self-discipline to keep a high speed, FLOOX keeps the speed you choose, so that you can relax and concentrate on the meaning. Reading becomes like watching a movie, while remaining a great exercise for your brain. Since words on the screen are always moving and grabbing your attention, concentrating on reading is also much easier than for a static text, where your mind tends to wonder away because there is no action. The basis of any speed reading is to reduce the vocalization: understand the words without pronouncing them with your internal voice; and FLOOX helps you achieve this. So your regular reading will also improve after using FLOOX! Besides, since you only need to see one word a time, you can use a much larger font and hold the device farther away, which is less tiring on your eyes and saves your vision. Remember: this method requires a skill. You can truly appreciate it only after practicing it for a couple of weeks. + Supports EPUB, MOBI, FB2, PDF, TXT and HTML files, Copy-Paste and Sharing. There are many websites to convert other formats to EPUB or FB2. + When pasting or sharing links, they are loaded automatically, so you can read the news or Wikipedia using FLOOX + See the remaining time to finish the book and the estimated speed (words per minute) + Easily increase/decrease speed or fine-tune all delays to make it behave exactly as you want + See the words surrounding the current words, to roughly understand the context and look ahead or behind when needed + Set colors you like + Right-to-Left support + Chinese and Japanese languages support You can purchase a 1-year AD-FREE subscription! Terms of Use: http://astrate.ch/terms_of_use_floox_free.html
Simply Fluent
This app helps you learn languages by reading books. It provides contextual translations, automatically saves new vocabulary, and creates flashcards from your reading. Enjoy reading any EPUB or PDF, or browse the app's library, even offline.
- Contextual word translations
- Automatic vocabulary saving
- Personalized flashcards
- Import EPUB/PDF
- Offline reading
- Read-aloud functionality
- Progress tracking
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A reading app that helps you learn a language by yourself. Pick up a book at your level and translate any word or phrase to see the meaning it has in that sentence. Save a word and its meaning is shown above it in every book after that. The common words come back on every page, so the more you read, the less you look up. • Books in 45 languages, at every level • Short stories and classics retold in today's language • Import your own books and read them the same way • Have your own AI assistant write you a story and read it here • The grammar behind any word or phrase, with examples • Any book read aloud while the pages turn • Flashcards of every word you save • Starting from zero? In a growing number of languages you can learn the alphabet and your first 100 words first Start a free trial of Premium or use the limited free version.
Screenshots
Verdict
The clearest difference is review sentiment: FLOOX reader at 80% against Simply Fluent's 50%. FLOOX reader also leads on ratings volume (5 vs 1) and iOS requirement (13.0 vs 17.0). Simply Fluent's advantage is update cadence (every 3 weeks vs every 9 months) and rating (5.0 vs 4.8). 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
Both are free to download. FLOOX reader sells 1 in-app purchase, starting at $3.99 per year and Simply Fluent sells 5 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.
Simply Fluent holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: FLOOX reader has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 80% of FLOOX reader's written reviews are positive against 50% of Simply Fluent's, so the app with the better star average is not the one people write more warmly about.
FLOOX reader ships an update every 9 months, Simply Fluent every 3 weeks. Both last shipped on October 24, 2026.
| Parameter | FLOOX reader | Simply Fluent |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 80.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 9 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 37 MB | 105 MB |
| Age rating | 4+ | 12+ |
| Developer | Anton Lastochkin | Simply Fluent OU |
Customer experience
FLOOX reader
Simply Fluent
In-app purchases
FLOOX reader
- FLOOX without advertisements$3.991 Year
Simply Fluent
- Monthly14 Days trial$6.991 Month
- Monthly$6.991 Month
- Quarterly3 Days trial$14.993 Months
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- Yearly14 Days trial$49.991 Year
- Yearly$49.991 Year









