Comparison

StackCards vs IIKANZI KIKAI 1

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

Head to head
About

StackCards

Features
Read full description

StackCards is a beautiful, focused flashcards app for studying anything languages, math, science, code, history, or any subject you want to master. Create a card, add the answer, and review it until it sticks. No clutter, no accounts, no subscriptions. MADE FOR ANY SUBJECT • Basic cards - a question or term and its answer • Vocabulary cards - a word or phrase and its translation • Formula cards - a name and its formula, with a math symbols keyboard • Code cards - concepts with syntax-highlighted snippets in 17+ languages SMART STUDY • A smart review mode that brings back the cards you miss and haven't seen in a while • Study modes: smart mix, hardest first, least reviewed, and shuffle • Beat-the-clock timed mode • Swipe to rate, tap to reveal, flip for examples and notes STAY ORGANIZED • Group cards into collections and subfolders • Color tags and instant search • Drag & drop to move and reorder • Export and import collections to share or back them up BUILD A HABIT • A daily streak that keeps you coming back • Optional evening reminder if you haven't studied • Unlock an exclusive theme and card style at a 100-day streak MAKE IT YOURS • Light, dark, and system appearance • Accent colors, animated backgrounds, and animated card styles • Track your progress with mastered / learning / new stats PRIVATE BY DESIGN Everything stays on your device. StackCards doesn't track you and doesn't collect your data. STACKCARDS PREMIUM Unlock everything with a single payment - yours forever, no subscription: • Unlimited collections and nested folders • Every theme, accent color, and card style • Add images to your cards • Unlimited imports of any size The free plan includes up to 3 collections, unlimited cards, and one level of subfolders - plenty to get started.

About

IIKANZI KIKAI 1

Features
Read full description

Exam preparation for the Specified Skilled Worker (i) evaluation test in METAL AND MACHINERY PROCESSING (ę©Ÿę¢°é‡‘å±žåŠ å·„), part of Japan's manufacturing field test. Every kanji in the Japanese questions carries furigana, and each question comes with Vietnamese, English, Indonesian and Myanmar translations. You do not need strong Japanese to understand what is being asked. ā–  20 MOCK EXAMS — TEST 1 IS FREE Same structure as the real test: 30 true/false questions (学科) plus 10 multiple-choice questions (å®ŸęŠ€). Submit and see your score and every wrong answer immediately. Test 1 is free with unlimited attempts; the other 19 open with the plan. ā–  PRACTICE MODE — 53 TOPICS, 800 QUESTIONS Organised by exam topic so you can drill the areas you are weak in, with a progress bar for each. ā–  TECHNICAL VOCABULARY — 1,604 WORDS IN 10 CHAPTERS Machine tools, measurement, materials, workplace safety, quality control. Every word has real recorded audio. ā–  GRAMMAR BUILT FOR THE EXAM — 54 PATTERNS Not conversational Japanese. Only the sentence patterns that actually appear in the test, with audio: the 怌怜恧恂悋怍 ending used in true/false items, how the exam expresses prohibited / required / permitted, and how it frames numbers and limits. ā–  REVIEW, STUDY ROUTE AND EXAM GUIDE Wrong answers are collected automatically for later review. A suggested study order and a guide to the exam are included. All three are free. ā–  WHAT IS FREE Test 1 (40 questions) with unlimited attempts, scoring and correct answers. Full explanations for the first two questions of each of the 53 practice topics. Vocabulary chapter 1 and the first two grammar groups. Review, study route and exam guide are entirely free. ā–  3-MONTH PLAN Unlocks the other 19 mock tests, explanations, memory tips and terms for every question, all 10 vocabulary chapters and all 7 grammar groups. A one-off three-month purchase that does NOT auto-renew. Study on your phone or on the web at k1.iikanzi.jp.

Screenshots

StackCards4 screens
IIKANZI KIKAI 14 screens

Verdict

The call

The clearest difference is update cadence: IIKANZI KIKAI 1 at every 4 days against StackCards's monthly. IIKANZI KIKAI 1 also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. StackCards sells 1 one-off in-app purchase and IIKANZI KIKAI 1 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

StackCards ships an update monthly, IIKANZI KIKAI 1 every 4 days. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

Scorecard2 real differences Ā· 4 level
StackCards versus IIKANZI KIKAI 1: the parameters behind the verdict, then further details
ParameterStackCardsIIKANZI KIKAI 1
PriceFreeFree
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size5 MB67 MB
Age rating4+4+
DeveloperLuis Leonardo Salas DelgadilloHUONG BUI THI MINH

In-app purchases

1 purchases

StackCards

One-time1
  • StackCards Premium$4.99
3 purchases

IIKANZI KIKAI 1

One-time3
  • 3ć‹ęœˆćƒ—ćƒ©ćƒ³$22.99
  • å‹•ē”»ć¤ććøć‚¢ćƒƒćƒ—ć‚°ćƒ¬ćƒ¼ćƒ‰$24.99
  • å‹•ē”»ć¤ć6ć‹ęœˆćƒ—ćƒ©ćƒ³$49.99

Questions

Is StackCards free?
StackCards is free to download, with in-app purchases available.
Is IIKANZI KIKAI 1 free?
IIKANZI KIKAI 1 is free to download, with in-app purchases available.
Do StackCards or IIKANZI KIKAI 1 have ads?
Neither StackCards nor IIKANZI KIKAI 1 shows ads.
Which is updated more often, StackCards or IIKANZI KIKAI 1?
StackCards ships an update monthly, and IIKANZI KIKAI 1 every 4 days. Most recently, StackCards was updated on October 25, 2026 and IIKANZI KIKAI 1 on October 29, 2026.

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