Comparison

Calculation Practice vs HayaiLearn

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

Head to head
About

Calculation Practice

Master fundamental math skills with this interactive flashcard app. Choose the correct answer from multiple choices for randomly generated calculations. Track your progress with accuracy and time metrics after each session.

Highlights
  • Randomized calculation problems
  • Multiple-choice answers
  • Auditory feedback for correct answers
  • Progress tracking (correct answers, time)
  • Daily practice reinforcement
Features
Read full description

A "calculation card" is a study application for mastering fundamental calculation. You choose the answer regarded as right as the numerical calculation displayed at random from three candidates. We announce you a correct answer to sound. After all the lessons finish, the number of correct answers and time are displayed. The skill of calculation could be made to raise by repeating every day.

About

HayaiLearn

This platform uses AI-powered video immersion to help you learn Japanese. It provides translations, explanations, and vocabulary breakdowns for YouTube videos, making learning fun and natural.

Highlights
  • AI subtitle translations and explanations
  • Interactive word meaning lookup
  • 10,000+ pre-processed YouTube videos
  • SRS video review and sentence mining
  • Shadowing for pronunciation practice
  • Word frequency lists and stats tracking
Read full description

Learn Japanese the way you'll actually stick with - by watching the YouTube content you already love. HayaiLearn ("hayai" means fast) turns any Japanese video into an interactive lesson with AI-powered subtitles, instant contextual translations, and real speaking practice. Immersion in easy mode. Most learners quit because they feel overwhelmed, short on time, or have nowhere to practice. HayaiLearn fixes all three: enjoyable content keeps you motivated, bite-sized study fits any schedule, and an AI conversation partner gives you unlimited practice. Learn from videos you enjoy 20,000+ Japanese videos, plus import any YouTube video yourself Every video graded 1-10 by difficulty, so you always find content at your level A personalized feed that surfaces what's most comprehensible to you right now AI that makes hard content easy Fully AI-parsed subtitles - far more accurate for slang and casual speech Tap any word for the meaning that fits this sentence, not a wall of definitions One-tap AI explanations break down grammar and sentence patterns on demand Actually speak the language Roleplay conversations built around the exact words and grammar you're learning The AI voices the scene, listens to your reply, and gives instant, explainable feedback Shadowing and pronunciation grading to sharpen your accent Remember what you learn Smart spaced-repetition Review for reading and listening, grounded in real clips Flashcard or multiple-choice, drilled in the context you first saw the word Frequency-based vocabulary lists with JLPT N5-N1 filters Track real progress XP across all four skills - Reading, Listening, Writing, Speaking Level up, build daily streaks, and watch words go from "just started" to "mastered" Mine and save sentences, organize videos into albums, and study your way Built for the full journey Input builds comprehension. Output builds fluency. HayaiLearn is the only tool that covers both - turning the shows you love into the fastest path to speaking Japanese. A paid subscription is required to access content and features. You can start with a free 7-day trial; cancel anytime. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.hayailearn.com/company/privacy-policy

Screenshots

Calculation Practice4 screens
HayaiLearn4 screens

Verdict

The call

The clearest difference is review sentiment: HayaiLearn at 50% against Calculation Practice's 0%. HayaiLearn also leads on price (Free vs $0.99) and update cadence (every 10 days vs every 17 months). Calculation Practice's advantage is in-app purchases (none vs 6). On 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

HayaiLearn is free to download; Calculation Practice costs $0.99 up front. HayaiLearn sells 6 in-app purchases, starting at $12.99 per month. Calculation Practice asks for nothing beyond the download.

UpkeepUpdate frequency

Calculation Practice ships an update every 17 months, HayaiLearn every 10 days. The most recent releases landed on June 5, 2026 and September 14, 2026 respectively.

Scorecard6 real differences · 4 level
Calculation Practice versus HayaiLearn: the parameters behind the verdict, then further details
ParameterCalculation PracticeHayaiLearn
Price$0.99Free — better
Rating—4.3 (29 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings—29 — better
Update frequencyEvery 17 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhoneiPhone, iPad — better
Requires iOS18.216.4 — better
Further details — not scored
Size2 MB106 MB
Age rating4+12+
DeveloperHideomi SatoFallen Cloud Studios LLC

Customer experience

Calculation Practice

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

HayaiLearn

All ratings29 ratings
Positive86.2%
Neutral0.0%
Negative13.8%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Calculation Practice

No in-app purchases

6 purchases

HayaiLearn

Subscriptions5
  • Pro$12.991 Month
  • Pro Access7 Days trial$12.991 Month
  • Platinum$24.991 Month
Show 2 more
  • Pro Access7 Days trial$99.991 Year
  • Platinum7 Days trial$184.991 Year
One-time1
  • Pro Access$249.99

Questions

Is Calculation Practice free?
Calculation Practice costs $0.99, with no in-app purchases.
Is HayaiLearn free?
HayaiLearn is free to download, with in-app purchases available.
Do Calculation Practice or HayaiLearn have ads?
Neither Calculation Practice nor HayaiLearn shows ads.
Which is updated more often, Calculation Practice or HayaiLearn?
Calculation Practice ships an update every 17 months, and HayaiLearn every 10 days. Most recently, Calculation Practice was updated on June 5, 2026 and HayaiLearn on September 14, 2026.

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