# SUUGAKU - Enjoy Numbers — 14 themes of number magic

> 14 themes of number magic (iPhone/iPad app by Fuji Bit Inc..)

- Source: https://appshunter.io/ios/app/suugaku-enjoy-numbers/id6759102221 (this page in markdown: same URL + `.md`)
- Developer: [Fuji Bit Inc.](https://appshunter.io/developer/1874205957)
- Category: Education, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 9 MB
- Languages: American English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bangla and 63 more
- Released: 2026-03-28
- Data updated: 2026-11-05

## What is SUUGAKU?

SUUGAKU lets you discover the wonders of numbers with your own hands. Enter any number and watch the calculation unfold through animations and graphs. Whether math is hard for you or number theory is your passion, there is something to enjoy.

[14 THEMES]

- Kaprekar Numbers
Sort digits and subtract, again and again, and watch numbers converge to 495 or 6174, step by step.

- Collatz Sequence
If even, divide by 2. If odd, multiply by 3 and add 1. See the path of this unsolved conjecture on a graph.

- Perfect & Amicable Numbers
Find numbers like 6, 28 and 496 whose divisors sum to themselves, and pairs whose divisors sum to each other.

- Prime Numbers
Try primality checks, factorization, the Sieve of Eratosthenes, twin primes and Mersenne primes.

- Fibonacci Sequence
Compute the Nth number, check any number, and explore the list and graph of this sequence found in nature.

- Harshad Numbers
Check and list numbers divisible by the sum of their digits.

- Magic Squares
Generate odd-order squares with equal rows, columns and diagonals, in animation.

- Goldbach's Conjecture
Split even numbers of 4 or more into two primes and count the pairs.

- Smith Numbers
Find composite numbers whose digit sum equals the digit sum of their prime factors.

- Happy Numbers
Sum the squares of the digits again and again, and see step by step whether you reach 1.

- Palindrome Numbers
Check numbers that read the same both ways, and try the reverse-and-add puzzle of 196.

- Pythagorean Triples
Check triples with a² + b² = c², see the right triangle, and list the primitive triples.

- Triangular Numbers (new)
Arrange dots into a triangle to see n(n+1)/2 for yourself, then check and list them.

- Narcissistic Numbers (new)
Find numbers like 153 = 1³ + 5³ + 3³, equal to the sum of their digits raised to the number of digits.

[FEATURES]
- Dark and light themes
- All calculations run on your device
- No account needed
- Available in many languages

This app shows ads.

## Is SUUGAKU safe?

Not enough ratings yet to assess SUUGAKU.

## Is SUUGAKU legit?

SUUGAKU - Enjoy Numbers appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SUUGAKU is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 7.0 — 2026-11-03

Version 7.0
- New themes: Triangular and Narcissistic numbers
- A completely new design
- Many more languages, with a language picker in the app
- A new ad provider, and you can change your ad choice in Settings

### 6.2 — 2026-06-05

- Redesigned HOME screen — a top "Recommended" row plus 2-column category grids for easier browsing
- Cards now use a theme-color gradient background with a larger centered icon
- New modes are highlighted with a "NEW" badge

### 6.1 — 2026-05-22

- Redesigned HOME screen — 4 categories stacked vertically, each with a horizontal-scroll row of cards so all themes are visible at a glance
- Cards now show an icon, title, and short description for instant theme recognition
- New layout stays compact as more modes are added, eliminating long vertical scrolls

### 6.0.1 — 2026-05-20

- Fixed an issue where some tab bar icons were clipped at the bottom
- Improved the copyright footer placement so it sits correctly just above the tab bar

### 6.0 — 2026-05-17

- New mode: Pythagorean Triples — check integer triples satisfying a²+b²=c² and visualize the right triangle
- Primitive triples list mode enumerates all triples via Euclid's formula
- Redesigned HOME screen with 4 horizontal-tab categories (Primes & Divisors, Digit Magic, Iterative Wonders, Sequences & Shapes)
- Copyright notice now permanently displayed just above the bottom tab bar

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## More apps by Fuji Bit Inc.

- [RENGOKU: Time Attack Pachinko](https://appshunter.io/ios/app/rengoku-time-attack-pachinko/id6758652751)
- [BUTURAKU](https://appshunter.io/ios/app/buturaku/id6759213255)
- [DENRAKU - Electromagnetism Sim](https://appshunter.io/ios/app/denraku-electromagnetism-sim/id6759393816)
- [PAKEDOU](https://appshunter.io/ios/app/pakedou/id6759820254)
- [OKURERUNA！](https://appshunter.io/ios/app/okureruna/id6759956971)

All apps by Fuji Bit Inc.: https://appshunter.io/developer/1874205957

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*