π ~PI~ vs KANJI the difference
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
π ~PI~
Learn the digits of pi with engaging practice and challenge modes. Test your memory and see how many digits you can recall. Perfect for math enthusiasts and those looking to improve their memorization skills.
- Learn pi digits
- Practice mode
- Challenge mode
- Memorize long sequences
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This app supports to learn pi (ratio of a circle's circumference). You can choose PRACTICE MODE and CHALLENGE MODE. Learn longer, longer, longer digits.
KANJI the difference
Test your kanji recognition skills by finding the single different character among similar ones within a 30-second time limit. Earn bonus points for consecutive correct answers and track your progress with detailed play statistics. Enjoy a collection of over 300 questions, from common to obscure kanji, accompanied by calming background music.
- Find different kanji
- 30-second time limit
- Consecutive answer bonus
- Over 300 questions
- Score sharing
- Play status tracking
- Calming background music
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An application to find only one different kanji among similar kanji within a time limit of 30 seconds. You can get more points by consecutive correct answers! Abundant number of questions More than 300 questions, ranging from familiar to difficult-to-read kanji! ●Share function Share your scores on Twitter! ●Play Status Record the number of questions found per second! ●Calming BGM Concentrate on playing with relaxing background music! Translated with www.DeepL.com/Translator (free version)
Screenshots
Verdict
The clearest difference is ads: π ~PI~ at none against KANJI the difference's shown. π ~PI~ also leads on monetization model (free vs ad-supported) and iOS requirement (8.0 vs 18.0). KANJI the difference's advantage is update cadence (every 3 months vs every 6 months). On price, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
π ~PI~ ships an update every 6 months, KANJI the difference every 3 months. The most recent releases landed on September 27, 2026 and September 30, 2026 respectively.
| Parameter | π ~PI~ | KANJI the difference |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 23 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuki Takeda | Shuya Komiya |
Customer experience
π ~PI~
KANJI the difference
In-app purchases
π ~PI~
No in-app purchases
KANJI the difference
No in-app purchases
Questions
Is π ~PI~ free?
Is KANJI the difference free?
Do π ~PI~ or KANJI the difference have ads?
Which is updated more often, π ~PI~ or KANJI the difference?
Other comparisons
