Comparison

VLJ Grammar Lite vs Okiru

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

Head to head
About

VLJ Grammar Lite

Features
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◆ ◇ ◆ ◇ ◆ ◇ ◆ ◇ ◆ ◇ ◆ ◇ Let's learn Japanese with the intelligible method! ◇ ◆ ◇ ◆ ◇ ◆ ◇ ◆ ◇ ◆ ◇ ◆ With this app, you can experience how easy it is to learn Japanese by the unique and original learning method (*1) with cards of various colors and shapes, which represent each part of speech. This renewal version of VLJ Grammar Lite contains much more quizzes. *This free application with limited well-selected contents, is a part of the new cloud-based Japanese language educational service "Visual Learning .Japanese", which is provided by NTT ExC Partner Corporation. Please use “VLJ Grammar” app(*2) which comes with full contents, not this app; “VLJ Grammar Lite”, if you are the students of the VLJ course provided by your company or your school. 【Main Functions】 Users can enjoy and learn grammar, vocabulary and expressions with quizzes which use unique interface of smartphone devices, such as dragging and tapping words. In addition, users can learn not only the grammatical structure of Japanese but also the pronunciation of native Japanese speakers. You can try well-selected 45 quizzes in this lite version. (In the “VLJ Grammar” App, which is for students in the VLJ course, you can try more than 1,000 quizzes.) (*1) This method is called “The Ezoe Method”, which is a Japanese learning method developed with nearly 40-year devotion by Shinjuku Japanese Language Institute. By visualizing sentence structures with original cards learners can understand Japanese in a very intuitive way. (*2) ID and Password will be required. 【Default languages】 English Japanese Traditional Chinese (繁體中文) Simplified Chinese (简体中文) French (français) Portuguese (português) Arabic (العربية) Vietnamese (Tiếng Việt)

About

Okiru

Features
Read full description

Okiru is an alarm clock flashcard app built to make studying automatic. Set it for any moment, waking up, a study break, a reminder mid-afternoon, and the instant it rings, a flashcard session is one tap away. AN ALARM THAT ACTUALLY HOLDS YOU TO IT No digging through menus, no excuses. Whatever time you set, Okiru turns that moment into guaranteed practice, building the kind of consistency that's nearly impossible to fake your way through. PRACTICE ANYTIME, ALARM OR NOT Don't want to wait for an alarm? Jump into a practice session whenever you feel like it. The alarm is there for accountability, not a requirement. SMART REVIEW Spaced repetition shows the words you're about to forget, right before you forget them, so every session actually moves the needle. EVERY JLPT LEVEL, ORGANIZED N5 through N1 vocabulary, sorted by level, so you're always studying at the right difficulty for where you actually are. TRACK REAL PROGRESS See your streak build day by day, watch which words you've actually mastered, and spot the ones still giving you trouble before they slow you down. MAKE IT YOURS Add your own words and categories alongside the built-in vocabulary. STUDY ANYWHERE Your vocabulary and progress live on your device. There is no connection required to study. Set as many alarms as you want, whenever you want them. Okiru makes sure each one actually gets you studying, not just awake. Subscription Details: Okiru Pro is available as a monthly or yearly auto-renewing subscription. • Okiru Pro Monthly – $4.99/month (USD; price varies by region) • Okiru Pro Yearly – $39.99/year (USD; price varies by region) Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.playfuljapanese.com/privacy

Screenshots

VLJ Grammar Lite4 screens
Okiru4 screens

Verdict

The call

The clearest difference is in-app purchases: VLJ Grammar Lite at none against Okiru's 2. VLJ Grammar Lite also leads on iOS requirement (12.0 vs 15.1). Okiru's advantage is update cadence (every 3 days vs every 8 months). On price, ads 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. Okiru sells 2 in-app purchases, starting at $4.99 per month. VLJ Grammar Lite asks for nothing beyond the download.

UpkeepUpdate frequency

VLJ Grammar Lite ships an update every 8 months, Okiru every 3 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 3 level
VLJ Grammar Lite versus Okiru: the parameters behind the verdict, then further details
ParameterVLJ Grammar LiteOkiru
PriceFreeFree
Update frequencyEvery 8 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.1
Further details — not scored
Size13 MB74 MB
Age rating4+4+
DeveloperNTT Learning Systems Corporation.Langston Culpepper Hill

In-app purchases

None

VLJ Grammar Lite

No in-app purchases

2 purchases

Okiru

Subscriptions2
  • Okiru Pro Monthly7 Days trial$4.991 Month
  • Okiru Pro Yearly7 Days trial$39.991 Year

Questions

Is VLJ Grammar Lite free?
VLJ Grammar Lite is free to download, with no in-app purchases.
Is Okiru free?
Okiru is free to download, with in-app purchases available.
Do VLJ Grammar Lite or Okiru have ads?
Neither VLJ Grammar Lite nor Okiru shows ads.
Which is updated more often, VLJ Grammar Lite or Okiru?
VLJ Grammar Lite ships an update every 8 months, and Okiru every 3 days. Most recently, VLJ Grammar Lite was updated on October 26, 2026 and Okiru on October 24, 2026.

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