Comparison

Kiku vs Japanese Reflex

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

Head to head
About

Kiku

Master new languages through engaging content inspired by social media. Begin with a free trial, then unlock full access with a subscription to explore diverse learning materials.

Highlights
  • Learn languages from social media content
  • Free trial available
  • Subscription-based access
  • Multiple subscription plans
  • Supports iPhone, iPad, and iPod
Features
Read full description

Learn Languages from Social Media Start learning for free - after free trial, requires a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Japanese Reflex

Train your brain for instant Japanese comprehension and response. This app focuses on audio-driven drills to build automatic recognition of grammar, vocabulary, and spoken Japanese, moving beyond traditional memorization.

Highlights
  • Instant grammar pattern recognition
  • Process spoken Japanese at speed
  • Automatic particle and sentence role identification
  • Intuitive verb form understanding
  • Real-world expression mastery
  • Audio-first listening comprehension
  • Performance tracking and speed analysis
Features
Read full description

Stop translating Japanese in your head. Start processing it automatically. Japanese Reflex uses fast, interactive drills to develop your Japanese Brain—the mental pathways that let you understand Japanese directly, without translating everything into English first. Traditional study can teach you thousands of words and grammar points, but knowledge alone does not guarantee fast processing. Even learners who have passed JLPT N2 or N1 may still struggle to follow conversations or respond without hesitation. Japanese Reflex bridges that gap. It is more than a vocabulary or grammar app—it is a reflex training system that turns what you know into fast, automatic Japanese ability. BUILD YOUR JAPANESE REFLEXES Short, audio-driven drills train you to: • Recognize grammar patterns instantly • Process spoken Japanese at conversational speed • Identify particles and sentence roles automatically • Understand verb forms without conscious translation • Distinguish transitive and intransitive verbs • Navigate conditionals, requests, keigo, and nuance • Respond based on meaning instead of memorized rules Each drill challenges you to make quick, accurate decisions, moving Japanese processing from slow and conscious to fast and intuitive. MEASURE YOUR JAPANESE BRAIN Japanese Reflex includes 26 Reflex Drills targeting critical—and often difficult—grammar and meaning patterns. Every completed drill gives you a Reflex Score combining accuracy and response speed. The app averages your five most recent scores across all 26 drills to calculate your overall Japanese Brain Score: a measure of real-time Japanese processing ability ranging from 0 to 105. Your goal is to raise your Japanese Brain Score above 90—the level where processing and understanding Japanese become fast, intuitive, and automatic. ADAPTIVE PRACTICE Adaptive Practice identifies the specific grammar skills and meaning patterns giving you trouble, then gives you extra practice with those weaker areas. Each session adapts to your performance and continues working on difficult skills until you can answer correctly and consistently—helping turn weak points into automatic reflexes. MASTER YOUR MISSES Master Your Misses creates focused review sets from questions you answered incorrectly. Work directly on your weak points until the correct response becomes automatic. CHALLENGE FRIENDS Create custom challenges, invite friends, and compete on leaderboards. Whether you are preparing for the JLPT, living in Japan, or studying with classmates, Challenges make consistent practice more engaging. TRY IT FREE Start with free access to every Reflex Drill. Create a free account for additional practice time, cloud sync, challenges, and personalized progress tracking. Upgrade to Premium for unlimited Reflex Drill training. Optional JLPT vocabulary and grammar packages can be purchased separately. No subscriptions. No ads. Every purchase is yours to keep. KEY FEATURES • 26 fast, interactive Reflex Drills • Training for particles, sentence roles, verb forms, conditionals, keigo, and more • Reflex Scores measuring accuracy and response speed • Overall Japanese Brain Score from 0 to 105 • Adaptive Practice targeting specific weak skills • Master Your Misses focused review • Japanese Brain Vocabulary study • Customizable audio reviews and self-assessment quizzes • Friend challenges and leaderboards • Cloud sync and personalized progress tracking WHO IT’S FOR • Learners stuck translating Japanese in their heads • Intermediate and advanced learners who know Japanese but cannot process it quickly • Beginners who want to build strong foundations • Anyone preparing for the JLPT • Professionals, students, and residents in Japan • Busy learners who want efficient, focused practice • Anyone who wants to understand Japanese in real time Knowing Japanese is not the same as processing it automatically. Train your Japanese Brain. Build real reflexes. Understand Japanese faster.

Screenshots

Kiku3 screens
Japanese Reflex4 screens

Verdict

The call

The clearest difference is rating: Kiku at 3.7 against Japanese Reflex's 3.0. Kiku also leads on ratings volume (3 vs 1). Japanese Reflex's advantage is monetization model (free with in-app purchases vs subscription). On price, update cadence, ads and in-app purchases 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. Kiku sells 2 in-app purchases, starting at $4.99 per month and Japanese Reflex sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Kiku holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
Kiku versus Japanese Reflex: the parameters behind the verdict, then further details
ParameterKikuJapanese Reflex
PriceFreeFree
Rating3.7 (3 ratings) — better3.0 (1 ratings)
Positive reviews—0.0% of reviews
Number of ratings3 — better1
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size28 MB53 MB
Age rating4+4+
DeveloperNumfor Chiaso'Oh Mbiziwo-TiapoShem LAWLOR

Customer experience

Kiku

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

Japanese Reflex

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

2 purchases

Kiku

Subscriptions2
  • KiKu Monthly7 Days trial$4.991 Month
  • KiKu Yearly7 Days trial$29.991 Year
3 purchases

Japanese Reflex

One-time3
  • JLPT N1 Vocabulary$11.99
  • JLPT N1 Grammar$11.99
  • Full Access Unlock$22.99

Questions

Is Kiku free?
Kiku is free to download, with in-app purchases available.
Is Japanese Reflex free?
Japanese Reflex is free to download, with in-app purchases available.
Which has better reviews, Kiku or Japanese Reflex?
Kiku is rated higher. Kiku averages 3.7 out of 5 from 3 ratings, while Japanese Reflex averages 3.0 from 1 ratings.
Do Kiku or Japanese Reflex have ads?
Neither Kiku nor Japanese Reflex shows ads.
Which is updated more often, Kiku or Japanese Reflex?
Kiku ships an update fortnightly, and Japanese Reflex fortnightly. Most recently, Kiku was updated on October 24, 2026 and Japanese Reflex on October 9, 2026.

Other comparisons