Comparison

Kyoku Flashcards vs Feyn

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

Head to head
About

Kyoku Flashcards

Create, organize, and study digital flashcards using your Apple Pencil. Add images, choose templates, and utilize spaced repetition for effective learning. Sync across devices and share your decks.

Highlights
  • Create custom flashcards with writing or drawing
  • Add images to flashcards
  • Choose from various templates
  • Organize cards into decks and folders
  • Spaced repetition study method
  • iCloud sync across devices
  • Export and share flashcard decks
Features
Currently charting
Read full description

Kyoku Flashcards is a powerful flashcards app ready to use with your Apple Pencil. It will make it easier to learn anything you want. Transform your flashcards to the digital world. CREATE AND ORGANIZE YOUR FLASHCARDS LIKE ON REAL PAPER * Create your custom flashcards by writing or drawing what you want in their front and back sides. * Make it more visual by adding images to your flashcards * Choose from a large set of beautiful templates: Dotted, Ruled, Squared, Music or Blank flashcards * Organize your flashcards as you want among decks or folders STUDY YOUR FLASHCARDS * Study your flashcards regularly to learn the new concepts using Spaced Repetition (with Leitner System) * Use it side by side with any other App or website. * Support Dark Mode, to ease studying at night or in low light environments. BACKUP AND SHARE * Create a backup or share your decks of flashcards with your friends by exporting them as a file YOUR FLASHCARDS ALWAYS WITH YOU * All your flashcards with you at all times thanks to iCloud sync * Study your cards on the go with the companion Apps for iPhone and macOS Go paperless with Kyoku. I am looking forward to hearing from you, please let me know anything you would like to have or to improve in Kyoku Flashcards from the "Give us feedback" option in the Settings of the App.

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
Features
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

Kyoku Flashcards4 screens
Feyn4 screens

Verdict

The call

The clearest difference is price: Feyn at Free against Kyoku Flashcards's $3.99. Feyn also leads on rating (4.3 vs 4.1). Kyoku Flashcards's advantage is in-app purchases (none vs 3) and chart position (#144 vs unranked). On review sentiment, ratings volume, update cadence and ads 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

Feyn is free to download; Kyoku Flashcards costs $3.99 up front. Feyn sells 3 in-app purchases, starting at $5.99 per month. Kyoku Flashcards asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Feyn holds the better App Store score, 4.3 against 4.1. Both are backed by a comparable volume of ratings — 109 and 101 respectively. Written reviews point the same way: 73% of Kyoku Flashcards's written reviews are positive against 80% of Feyn's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 9 days. Both last shipped on November 3, 2026.

Scorecard5 real differences · 6 level
Kyoku Flashcards versus Feyn: the parameters behind the verdict, then further details
ParameterKyoku FlashcardsFeyn
Price$3.99Free — better
Rating4.1 (109 ratings)4.3 (101 ratings) — better
Positive reviews73.1% of reviews80.0% of reviews — better
Number of ratings109 — better101
Update frequencyEvery 9 daysEvery 9 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#144 — better—
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS16.0 — better16.1
Further details — not scored
Size8 MB14 MB
Age rating4+4+
DeveloperDavid CorderoJoaquin Alori

Customer experience

Kyoku Flashcards

All ratings109 ratings
Positive75.2%
Neutral11.0%
Negative13.8%
Written reviews134 reviews
Positive73.1%
Neutral12.7%
Negative14.2%

Feyn

All ratings101 ratings
Positive83.2%
Neutral6.9%
Negative9.9%
Written reviews215 reviews
Positive80.0%
Neutral7.9%
Negative12.1%

User reviews

Kyoku Flashcards

From 109 App Store ratings

What we love

  • 👍 Intuitive interface
  • ✨ Seamless Apple Pencil integration
  • 🚀 Efficient for handwritten flashcards
  • 💯 Helpful for studying and improving GPA
  • 🎨 Customizable card designs

Room to improve

  • 🐛 Occasional crashes and glitches
  • 🔄 Sync issues between devices
  • 📁 Lack of organization options (folders, search)
  • ✏️ No text input option
  • 🔍 Missing advanced review features (SRS, reminders)

Feyn

From 101 App Store ratings

What we love

  • 👍 Simple and easy to use
  • 🚀 Great for active recall and spaced repetition
  • 💡 Handwritten flashcards with Apple Pencil support
  • 🔒 No ads or paywalls
  • 👍 Clean and minimalist design

Room to improve

  • 🐛 Sync issues between iPad and iPhone
  • 🔍 Lack of search/filter options to find specific cards
  • 🖋️ Limited writing tools (no zoom, pressure sensitivity, etc.)
  • 📁 Difficulty organizing cards into nested folders
  • 🔄 No option to flip cards in a specific order (front/back)

Bugs and requests

Kyoku Flashcards

Reported bugs

3 issues
  • Images not displaying correctly
  • Inability to move or delete cards
  • Unexpected data loss or card deletion

Requested features

5 requests
  • Add text input option
  • Implement spaced repetition system (SRS)
  • Allow for more card organization (folders, search)
  • Improve sync and backup functionality
  • Provide more customization options (colors, templates)

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

None

Kyoku Flashcards

No in-app purchases

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 Kyoku Flashcards free?
Kyoku Flashcards costs $3.99, with no in-app purchases.
Is Feyn free?
Feyn is free to download, with in-app purchases available.
Which has better reviews, Kyoku Flashcards or Feyn?
Feyn is rated higher. Kyoku Flashcards averages 4.1 out of 5 from 109 ratings, while Feyn averages 4.3 from 101 ratings.
Do Kyoku Flashcards or Feyn have ads?
Neither Kyoku Flashcards nor Feyn shows ads.
Which is updated more often, Kyoku Flashcards or Feyn?
Kyoku Flashcards ships an update every 9 days, and Feyn every 9 days. Most recently, Kyoku Flashcards was updated on November 3, 2026 and Feyn on November 3, 2026.

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