# Calc vs Quackify

The clearest difference is in-app purchases: Quackify at none against Calc's 2. Calc's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Calc sells 2 in-app purchases, starting at $0.99 per month. Quackify asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Calc | Quackify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (28 ratings)](https://appshunter.io/ios/app/calc/id285807159/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 80.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mike Wesemann](https://appshunter.io/developer/285807162) | [Salvatore Rivieccio](https://appshunter.io/developer/1892817671) |

## What reviewers say

### Calc

[App page](https://appshunter.io/ios/app/calc/id285807159)

A visually appealing and straightforward calculator app for iPhone and iPad. It offers a unique user interface with support for basic and scientific calculations, various number base conversions, and currency and unit conversions.

**Highlights:** Universal app for iPhone and iPad, Basic and scientific calculations, Number base conversions (decimal, hex, binary, octal), Currency and unit conversions, Scrollable calculation history, 10 color themes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc Pro | $0.99 | per month |
| Calc Pro | $4.99 | per year |

**What reviewers like**

- 🚀 Free app
- 👍 Simple and easy to use
- 📜 Tape/history feature
- 🎨 Customizable colors
- 📤 Ability to email calculations

**What reviewers complain about**

- 🐛 Crashes or freezes on some devices
- 🔊 Annoying key click sounds
- 📜 Scrolling to see recent calculations
- 🔍 Overcrowded interface with too many functions

**Reported bugs**

- Percentage calculations not working correctly
- Cos 90 showing incorrect result

**Requested features**

- Copy and paste support
- Larger buttons for easier use
- Ability to clear calculation history
- Auto-insert previous result when using operators
- Landscape mode support


### Quackify

[App page](https://appshunter.io/ios/app/quackify/id6762604652)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calc free?

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

### Is Quackify free?

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

### Do Calc or Quackify have ads?

Neither Calc nor Quackify shows ads.

### Which is updated more often, Calc or Quackify?

Calc ships an update every 2 months, and Quackify every 2 months. Most recently, Calc was updated on September 20, 2026 and Quackify on September 13, 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.*