# Happy Kitty Calculator vs Nonuple Calc

The clearest difference is in-app purchases: Nonuple Calc at none against Happy Kitty Calculator's 1. Happy Kitty Calculator's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Happy Kitty Calculator sells 1 one-off in-app purchase. Nonuple Calc asks for nothing beyond the download.

Happy Kitty Calculator ships an update every 3 weeks, Nonuple Calc every 2 weeks. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Happy Kitty Calculator | Nonuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 59 MB | 36 MB |
| Requires iOS | **15.6** | 15.8.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HUA-TENG HUANG](https://appshunter.io/developer/1780056727) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Happy Kitty Calculator

[App page](https://appshunter.io/ios/app/happy-kitty-calculator/id6739179959)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One-time purchase. | $2.99 | one-time |


### Nonuple Calc

[App page](https://appshunter.io/ios/app/nonuple-calc/id6742040810)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Happy Kitty Calculator free?

Happy Kitty Calculator is free to download, with in-app purchases available.

### Is Nonuple Calc free?

Nonuple Calc is free to download, with no in-app purchases.

### Do Happy Kitty Calculator or Nonuple Calc have ads?

Nonuple Calc shows ads; Happy Kitty Calculator does not.

### Which is updated more often, Happy Kitty Calculator or Nonuple Calc?

Happy Kitty Calculator ships an update every 3 weeks, and Nonuple Calc every 2 weeks. Most recently, Happy Kitty Calculator was updated on October 3, 2026 and Nonuple Calc on October 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*