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

Learn Japanese through interactive video lessons, featuring tappable subtitles, AI conversation practice, and personalized vocabulary review. Build listening, reading, and speaking skills from beginner to advanced levels using content you enjoy.

Highlights
  • Interactive video lessons
  • Tappable subtitles with translations
  • AI conversation practice
  • Contextual grammar explanations
  • Spaced repetition vocabulary review
  • Pronunciation grading
  • Personalized content feed
Read full description

Learn Japanese with videos you love and start speaking from day one, even if you’re a complete beginner. HayaiLearn turns Japanese videos (Youtube or Local videos) into interactive lessons with tappable subtitles, contextual translations, grammar explanations, vocabulary review, and AI conversation practice. Build your listening and reading skills, then use what you learn out loud. SPEAK JAPANESE, EVEN FROM ZERO Don’t know how to say it yet? Use Translate assist to say what you mean in English and see how to say it in Japanese. Practice conversations with an AI partner using words and grammar you’re learning. • Get English-to-Japanese help when you’re stuck. • Tap Explain to understand the AI’s replies. • Tap words in the conversation and mark them as learning or known. • Practice roleplay conversations and get feedback on your answers. LEARN FROM VIDEOS YOU ENJOY Explore 20,000+ Japanese videos or bring a YouTube video you want to study. From everyday conversations to content about your interests, make Japanese immersion part of your routine. • Find videos graded from 1–10 by difficulty. • Discover a personalized feed matched to your comprehension. • Follow interactive subtitles and replay the lines you want to hear again. UNDERSTAND WORDS AND GRAMMAR IN CONTEXT Tap a Japanese word to see the meaning that fits the sentence. Get AI explanations of grammar, sentence patterns, slang, and casual speech without losing the context of the video. • Learn vocabulary from real sentences. • Break down unfamiliar Japanese with one-tap explanations. • Save useful sentences to revisit later. SHADOW VIDEOS AND GET A GRADE Listen to a line, repeat it out loud, and get a pronunciation grade. Practice shadowing with the videos you study, replay the original, and try again to improve your delivery. STUDY THE WORDS THAT MATTER TO YOU Prioritize vocabulary by how often it appears in the content you like. Build comprehension around your interests, with JLPT N5–N1 filters to help focus your study. REMEMBER MORE WITH SPACED REPETITION Turn the words you encounter into regular reading and listening practice. Review vocabulary in context with flashcards, multiple-choice questions, and video listening quizzes. • Watch and replay real clips as you review. • Practice recognizing words by sound as well as by sight. • Use spaced repetition to revisit what you’re learning. SEE YOUR JAPANESE GROW Earn XP across reading, listening, writing, and speaking. Build a daily streak and track words as they move from learning to known. Watch something you enjoy. Understand a little more. Put it into words. Make Japanese a habit you want to keep. A paid subscription is required to access content and features. 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 60% against Calculation Practice's 0%. HayaiLearn also leads on price (Free vs $0.99) and update cadence (every 8 days vs every 17 months). Calculation Practice's advantage is in-app purchases (none vs 9). 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 9 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 8 days. The most recent releases landed on November 1, 2026 and November 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—4.5 (41 ratings) — better
Positive reviews0.0% of reviews60.0% of reviews — better
Number of ratings—41 — better
Update frequencyEvery 17 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhoneiPhone, iPad — better
Requires iOS18.216.4 — better
Further details — not scored
Size2 MB127 MB
Age rating4+12+
DeveloperHideomi SatoFallen Cloud Studios LLC

Customer experience

Calculation Practice

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

HayaiLearn

All ratings41 ratings
Positive90.2%
Neutral0.0%
Negative9.8%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

None

Calculation Practice

No in-app purchases

9 purchases

HayaiLearn

Subscriptions9
  • Pro$12.991 Month
  • Pro Access7 Days trial$12.991 Month
  • Platinum$24.991 Month
Show 6 more
  • Pro Access$69.991 Year
  • Pro Access7 Days trial$69.991 Year
  • Pro Access7 Days trial$99.991 Year
  • Platinum Access$129.991 Year
  • Platinum7 Days trial$129.991 Year
  • Platinum7 Days trial$184.991 Year

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 8 days. Most recently, Calculation Practice was updated on November 1, 2026 and HayaiLearn on November 14, 2026.

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