# Y+ Calculator vs KumamonCalc

The clearest difference is review sentiment: KumamonCalc at 80% against Y+ Calculator's 0%. KumamonCalc also leads on rating (5.0 vs 3.0) and update cadence (every 3 months vs every 8 months). Y+ Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. KumamonCalc sells 1 one-off in-app purchase. Y+ Calculator asks for nothing beyond the download.

KumamonCalc holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Y+ Calculator's written reviews are positive against 80% of KumamonCalc's.

Y+ Calculator ships an update every 8 months, KumamonCalc every 3 months. The most recent releases landed on October 21, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Y+ Calculator | KumamonCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/y-plus-calculator/id650011524/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/kumamoncalc/id830364492/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 50 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cadence Design Systems, Inc.](https://appshunter.io/developer/1318385448) | [woodsmall inc.](https://appshunter.io/developer/708077492) |

## What reviewers say

### Y+ Calculator

[App page](https://appshunter.io/ios/app/y-plus-calculator/id650011524)

This app calculates the necessary grid spacing for computational fluid dynamics (CFD) simulations. It helps engineers determine near-wall cell height for accurate viscous flow computations. Supports both SI and Imperial units.

**Highlights:** Calculate grid spacing for target y+ values, Supports viscous CFD computations, Works in SI or Imperial units, Resets to sea-level conditions, Based on established fluid mechanics theory

**Features:** macOS Compatibility

**In-app purchases:** none


### KumamonCalc

[App page](https://appshunter.io/ios/app/kumamoncalc/id830364492)

A straightforward calculator featuring the popular Kumamon character. It supports basic arithmetic, percentage calculations, and memory functions. Users can customize themes and toggle sound effects.

**Highlights:** Basic arithmetic operations, Percentage calculation, Memory function, Customizable themes, Sound ON/OFF option, 12-digit input support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advertising hide | $4.99 | one-time |


## Frequently asked questions

### Is Y+ Calculator free?

Y+ Calculator is free to download, with no in-app purchases.

### Is KumamonCalc free?

KumamonCalc is free to download, with in-app purchases available.

### Which has better reviews, Y+ Calculator or KumamonCalc?

KumamonCalc is rated higher. Y+ Calculator averages 3.0 out of 5 from 1 ratings, while KumamonCalc averages 5.0 from 2 ratings.

### Do Y+ Calculator or KumamonCalc have ads?

KumamonCalc shows ads; Y+ Calculator does not.

### Which is updated more often, Y+ Calculator or KumamonCalc?

Y+ Calculator ships an update every 8 months, and KumamonCalc every 3 months. Most recently, Y+ Calculator was updated on October 21, 2026 and KumamonCalc on October 23, 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.*