Koki Flashcards vs Onki
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koki Flashcards
Master vocabulary with a smart, spaced repetition system. This multilingual flashcard app aids long-term memory retention through personalized review schedules, multimedia content, and custom card creation. Study languages effectively for exams or daily communication.
- Spaced Repetition System (SRS)
- Ready-to-use vocabulary decks
- Multimedia flashcards (images, audio, examples)
- Custom flashcard creation
- Personalized review schedules
- Offline study mode
- Cross-device synchronization
Read full descriptionHide full description
Learn vocabulary faster with Koki Flashcards, a smart flashcard app powered by spaced repetition (SRS). Create your own flash cards, study ready-made vocabulary decks, and review difficult words at the right time. Study with Anki-style flashcards and spaced repetition, with ready-made decks for English, Japanese, Chinese, Korean, Spanish, IELTS, TOEIC, JLPT, HSK, TOPIK, Minna no Nihongo, and more. SMART FLASHCARDS WITH SPACED REPETITION Koki uses a spaced repetition system (SRS) to help you remember vocabulary for longer. Difficult flashcards appear more often, while words you already know are reviewed less frequently. Your study schedule adapts as you learn so you can focus on what needs the most attention. READY-MADE VOCABULARY DECKS Start learning immediately with flashcards organized by language, level, and goal: • English vocabulary and English flashcards • IELTS vocabulary and TOEIC vocabulary • Japanese vocabulary and Japanese flashcards • JLPT vocabulary from N5 to N2 • Minna no Nihongo vocabulary • Hiragana, Katakana, and Kanji • Chinese vocabulary and Chinese flashcards • HSK vocabulary and HSK flashcards • Korean vocabulary and Korean flashcards • TOPIK vocabulary • Spanish, German, and French vocabulary • More languages and study decks CREATE YOUR OWN FLASHCARDS Koki also works as a flexible flashcard maker. Create custom flashcards in seconds and add words, definitions, translations, images, pronunciation audio, example sentences, and notes. Build vocabulary flashcards for language learning, school, exams, work, or anything you want to remember. LEARN WITH IMAGES, AUDIO AND EXAMPLES Make new words easier to understand and remember with clear meanings, helpful images, natural pronunciation audio, real-world examples, useful context, and translations. PRACTICE WRITING, PRONUNCIATION AND QUIZZES Go beyond simply flipping flashcards. Practice with: • Writing and spelling exercises • Pronunciation practice • Dictation • Matching quizzes • Multiple-choice questions • Test mode Switch between different study methods to strengthen active recall and keep reviews engaging. PERSONALIZED SRS LEARNING Koki adjusts your spaced repetition schedule based on your learning history and review results. Difficult vocabulary can return sooner, while words you remember well can wait longer. You can also customize study settings, including how many new words you want to learn each day and how frequently cards should return. STUDY ENGLISH, JAPANESE, CHINESE AND MORE Build English vocabulary for daily communication, IELTS, TOEIC, and academic study. Learn Japanese with JLPT flashcards, Minna no Nihongo, Hiragana, Katakana, Kanji, audio, examples, and SRS reviews. Study Chinese and Mandarin vocabulary with HSK flashcards, pronunciation, meanings, and spaced repetition. Koki also supports Korean, Spanish, German, French, and many other languages. WHY KOKI FLASHCARDS? Koki combines: • Smart flashcards • SRS and spaced repetition • Ready-made vocabulary decks • Custom flashcard creation • Images and pronunciation audio • Example sentences • Writing and spelling practice • Pronunciation and dictation • Multiple quiz modes • Personalized review schedules Whether you are preparing for IELTS, TOEIC, JLPT, HSK or TOPIK, studying Minna no Nihongo, learning a new language, or simply building vocabulary every day, Koki gives you a flexible way to learn and review. Create flashcards, review with spaced repetition, practice active recall, and build vocabulary that lasts. Koki Flashcards — smart vocabulary learning with flashcards, SRS, and spaced repetition. Terms of Service: https://anki.edu.vn/en/terms-of-service Privacy Policy: https://anki.edu.vn/en/privacy
Onki
This app uses a modified spaced repetition algorithm to help you memorize information efficiently. It presents you with cards due for review daily and reschedules them based on your recall accuracy. The goal is to minimize study time while maximizing retention.
- Modified FSRS algorithm
- Daily card reviews
- Recall-based rescheduling
- Adjustable difficulty
- Ad-free experience
Read full descriptionHide full description
Learn anything with Onki. Onki is an Anki-inspired memorization app built around a modified FSRS algorithm (Free Spaced Repetition Scheduler). FSRS adapts to your memory strength so you spend the least amount of time studying while retaining more. Here's how it works: once a day, Onki shows you only the cards you're due to review. After each card, you rate how well you remembered it, and FSRS reschedules it for the right day in the future. Pick "Forget" and the card resets — its memorization process starts over from the beginning. Free, now and forever. No ads, no gimmicks. Every in-app purchase is just a tip or a donation.
Screenshots
Verdict
The clearest difference is ads: Onki at none against Koki Flashcards's shown. Onki also leads on monetization model (free vs free with in-app purchases) and review sentiment (100% vs 86%). Koki Flashcards's advantage is ratings volume (343 vs 4) and update cadence (every 9 days vs monthly). On price, rating, 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
Both are free to download. Koki Flashcards sells 14 in-app purchases, starting at $2.99 per month and Onki sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Onki holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Koki Flashcards has 343 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 86% of Koki Flashcards's written reviews are positive against 100% of Onki's.
Koki Flashcards ships an update every 9 days, Onki monthly. Both last shipped on October 21, 2026.
| Parameter | Koki Flashcards | Onki |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (343 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 85.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 343 — better | 4 |
| Update frequency | Every 9 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 94 MB | 11 MB |
| Age rating | 12+ | 4+ |
| Developer | KOKI SOFTWARE | OLADIPUPO OLATIMILEYIN OGUNDIPE |
Customer experience
Koki Flashcards
Onki
In-app purchases
Koki Flashcards
- Subscription monthly3 Days trial$2.991 Month
- Subscription Anki all package3 Days trial$19.991 Year
- Buy 500 Points$2.99
- TOEIC 600 Words Special Offer$4.99
- 1000 Basic English Words$4.99
Show 9 moreShow fewer
- IELTS Vocabulary Discount$4.99
- English Daily Routine$4.99
- Phrases for Basic Communicate$4.99
- Anki Minnano Nihongo discount$8.99
- English - IELTS Vocabulary$9.99
- 600 TOEIC words$9.99
- Japanese - Minnano Nihongo$12.99
- Koki Flashcards Lifetime Discount$59.99
- Koki Flashcards Lifetime$79.99
Onki
- $1 Tip$1.00
- $3 Tip$3.00
- $5 Tip$5.00
Show 4 moreShow fewer
- $10 Tip$10.00
- $20 Tip$20.00
- $50 Tip$50.00
- $100 Tip$100.00









