# Calculator∫ vs Dùn

The clearest difference is in-app purchases: Calculator∫ at none against Dùn's 1. Calculator∫ also leads on update cadence (weekly vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Dùn sells 1 in-app purchase, starting at $9.99 per year. Calculator∫ asks for nothing beyond the download.

Calculator∫ ships an update weekly, Dùn every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculator∫ | Dùn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/calculator/id635938472/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 83.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free | — |
| Size | 1 MB | 14 MB |
| Requires iOS | **4.3** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [7th Gear](https://appshunter.io/developer/321178305) | [Rafael Schmitt](https://appshunter.io/developer/1624968823) |

## What reviewers say

### Calculator∫

[App page](https://appshunter.io/ios/app/calculator/id635938472)

Perform calculations quickly and accurately with large buttons. Personalize the interface by selecting custom background and text colors. This straightforward utility is designed for intuitive use.

**Highlights:** Large buttons for easy input, Accurate calculations, Customizable background colors, Customizable text colors, Intuitive user interface

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

**In-app purchases:** none


### Dùn

[App page](https://appshunter.io/ios/app/dun-private-link-storage/id6627333601)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dun Unlimited | $9.99 | per year |


## Frequently asked questions

### Is Calculator∫ free?

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

### Is Dùn free?

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

### Do Calculator∫ or Dùn have ads?

Neither Calculator∫ nor Dùn shows ads.

### Which is updated more often, Calculator∫ or Dùn?

Calculator∫ ships an update weekly, and Dùn every 2 months. Most recently, Calculator∫ was updated on October 23, 2026 and Dùn on October 24, 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.*