Comparison

TextbookDojo vs Feyn

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

Head to head
About

TextbookDojo

Features
Read full description

TextbookDojo is an app for "Memorization sheet". The "Memorization sheet" is a Japanese style memorization method. TextbookDojo means "memorize everything" in Japanese. With this method, you first hide the strings you want to remember from a textbook or notebook, and later see repeatedly if you have remembered them. This app turns memorization sheets into flashcards. Recommended for students studying medicine, law, geography, foreign languages, economics, programming, etc. These are fields that require a lot of memorization. # Main Features - Memorize textbooks and problem books by hiding the parts you want to remember. - Automatic AI-based Important Phrase Marking Feature - Supports memorization of question collections with questions and answers separated from each other - Voice recording and playback function - Free drawing function - By automatically alternating playback of questions and answers, memorization can be done without manipulating the flashcards. - Intensive memorization of weak points. - By adjusting the playback speed of the flashcards, you can memorize them at high speed. - Test questions based on the forgetting curve allow you to concentrate on memorizing the questions you have difficulty with. - An automatic zoom function allows non-stress memorization even for those who have difficulty with small letters or presbyopia. - Pages can be imported from PDF/photo/camera. - You can share books and markers with your friends. - You can create an unlimited number of books, pages, and markers for free. === Other details === # Premium Features - In the free version, ads are displayed during memorization. In the Premium version, no ads are displayed. # About Premium The Premium version has no advertisements and no functional limitations. Premium monthly fee: $4.49 Premium yearly fee: $32.99 *It will automatically renew within 24 hours before the end of the term. - Payment Method Payment is charged to your iTunes account. - Cancel Auto-Renewal Auto renewal billing settings must be cancelled at least 24 hours prior to the end of the one-month or one-year subscription period. Cancellation during the period is not allowed. Auto-renewal billing will be done at least 24 hours prior to the end of the term. - How to cancel auto-renewal 1. open the "Settings" application. 2. tap your name. 3. tap "Subscribe". 4. your iPhone will display the "Subscriptions" menu option in "Settings". 5. tap the subscription you wish to manage. 6. tap Cancel Subscription. - Restore when changing devices If you change devices, you can restore your previously purchased paid version for free; just sign in again with the account you used with TextbookDojo. Privacy Policy https://www.fukurobo.com/others-en.html#privacy Terms of Use https://www.fukurobo.com/others-en.html#legalnotice

About

Feyn

Create and review flashcards by drawing with your Apple Pencil or typing. Utilize spaced repetition for effective memorization on your iPhone or iPad. Share decks with friends and sync across devices via iCloud.

Highlights
  • Handwritten flashcard creation with Apple Pencil
  • Spaced repetition learning system
  • Cross-device synchronization via iCloud
  • Flashcard sharing with friends
  • Image and text input options
  • iOS Quick Note and Handoff support
Read full description

Use flashcards, spaced-repetition, and your Apple Pencil to study with Feyn! Taking your own notes by hand and spaced-repetition are the best way to learn new concepts, and with Feyn you can do just that. Open up a book on your iPad and comfortably draw your flashcards right there using your Apple Pencil in Feyn. The flashcards are phone-sized so that you can then take them on the go and comfortably review them on your iPhone! Their vertical shape also makes them easy to write while multi-tasking on your iPad, and perfect for learning languages written top to bottom like Japanese. If you don't feel like drawing, just type some text using your keyboard or drop images into your flashcards. In this way, you *learn* on your iPad as you think of how to you summarize new concepts into flashcards, and *memorize* on your iPhone while you review them on the go! Feyn is fully featured, you can share flashcard to study with your friends. Your flashcards will automatically synchronize between your devices using your iCloud drive. Feyn also supports iOS' Quick Note, Handoff, and keyboard input: type away on your iPad or on our macOS app! Feyn uses spaced repetition to aid in learning. It will ask you to review flashcards depending on how well you recall them, flashcards you miss will be asked more often, and flashcards you get right less often. This way you minimize the total time you spend studying and maximize retention! Feyn Pro ads some nice to have extra features like study charts, to see how well you're learning, and flashcard importing. All other features are free and unrestricted. We guarantee that you will always be able to have a complete study experience for free. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

TextbookDojo4 screens
Feyn4 screens

Verdict

The call

The clearest difference is ads: Feyn at none against TextbookDojo's shown. TextbookDojo's advantage is iOS requirement (14.0 vs 16.1). On price, update cadence, 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. TextbookDojo sells 3 in-app purchases, starting at $4.49 per month and Feyn sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on September 29, 2026 and September 27, 2026 respectively.

Scorecard2 real differences · 8 level
TextbookDojo versus Feyn: the parameters behind the verdict, then further details
ParameterTextbookDojoFeyn
PriceFreeFree
Rating—4.3 (91 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings—91 — better
Update frequencyEvery 9 daysEvery 9 days
AdsYesNo — better
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS14.0 — better16.1
Further details — not scored
Size102 MB14 MB
Age rating4+4+
DeveloperROBOBO, K.K.Joaquin Alori

Bugs and requests

TextbookDojo

Not enough reviews yet to summarise bugs or requests.

Feyn

Reported bugs

3 issues
  • Cards sometimes disappear after updates
  • App crashes on iOS 16 devices
  • Palm rejection issues when writing

Requested features

6 requests
  • Add option to import/export flashcards
  • Implement more review modes (e.g., front-to-back, back-to-front)
  • Introduce a zoom function for better writing experience
  • Add support for adding images/diagrams to cards
  • Implement nested folder structure for better organization
Show 1 more
  • Provide more customization options for cards (colors, layouts, etc.)

In-app purchases

3 purchases

TextbookDojo

Subscriptions3
  • 1 month payment$4.491 Month
  • 1 year payment$19.991 Year
  • プレミアム年払い(期間限定特別価格)$19.991 Year
3 purchases

Feyn

Subscriptions3
  • Feyn Pro (1 Month)7 Days trial$5.991 Month
  • Feyn Pro (6 Months)7 Days trial$19.996 Months
  • Feyn Pro (1 Year)7 Days trial$29.991 Year

Questions

Is TextbookDojo free?
TextbookDojo is free to download, with in-app purchases available.
Is Feyn free?
Feyn is free to download, with in-app purchases available.
Do TextbookDojo or Feyn have ads?
TextbookDojo shows ads; Feyn does not.
Which is updated more often, TextbookDojo or Feyn?
TextbookDojo ships an update every 9 days, and Feyn every 9 days. Most recently, TextbookDojo was updated on September 29, 2026 and Feyn on September 27, 2026.

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