# Cuspart vs Calculator with 13 button

The clearest difference is rating: Cuspart at 5.0 against Calculator with 13 button's 1.0. Cuspart also leads on iOS requirement (16.0 vs 26.0). Calculator with 13 button's advantage is in-app purchases (none vs 4) and update cadence (every 2 months vs every 4 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Cuspart sells 4 in-app purchases, starting at $0.99 per month. Calculator with 13 button asks for nothing beyond the download.

Cuspart holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Cuspart ships an update every 4 months, Calculator with 13 button every 2 months. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Cuspart | Calculator with 13 button |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cuspart-mycal/id1546543143/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/calculator-with-13-button/id6754880197/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 13 MB | 42 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Mustafa Tolga DALBUDAK](https://appshunter.io/developer/1479052908) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Cuspart

[App page](https://appshunter.io/ios/app/cuspart-mycal/id1546543143)

This app offers a professional-grade calculator with advanced math functions, a constants library, and intuitive history tracking. Customize your experience with various color themes and an accessible interface designed for ease of use.

**Highlights:** Basic and advanced arithmetic, Roots, powers, and logarithms, Constants library (π, e), Operation history, Customizable color themes, Accessible UI design

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $0.99 | per month |
| 3 Month Subscription | $2.99 | per 3 months |
| 12 Month Subscription | $9.99 | per year |
| Remove Ads | $2.49 | one-time |


### Calculator with 13 button

[App page](https://appshunter.io/ios/app/calculator-with-13-button/id6754880197)

This utility app provides a basic calculator with a unique 13-button layout for quick input. It is designed for iPhone users seeking a straightforward calculation tool.

**Highlights:** 13-button layout, Fast typing, Basic calculations, iPhone compatible

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

**In-app purchases:** none


## Frequently asked questions

### Is Cuspart free?

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

### Is Calculator with 13 button free?

Calculator with 13 button is free to download, with no in-app purchases.

### Which has better reviews, Cuspart or Calculator with 13 button?

Cuspart is rated higher. Cuspart averages 5.0 out of 5 from 1 ratings, while Calculator with 13 button averages 1.0 from 1 ratings.

### Do Cuspart or Calculator with 13 button have ads?

Both Cuspart and Calculator with 13 button show ads.

### Which is updated more often, Cuspart or Calculator with 13 button?

Cuspart ships an update every 4 months, and Calculator with 13 button every 2 months. Most recently, Cuspart was updated on October 18, 2026 and Calculator with 13 button on October 14, 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.*