# Conversion Calculator Units vs Scale Switch

The clearest difference is in-app purchases: Scale Switch at none against Conversion Calculator Units's 1. Scale Switch also leads on ads (none vs shown) and rating (5.0 vs 4.7). Conversion Calculator Units's advantage is ratings volume (5K vs 1) and iOS requirement (15.0 vs 18.1). On price, update cadence and device support there is nothing between them.

Both are free to download. Conversion Calculator Units sells 1 one-off in-app purchase. Scale Switch asks for nothing beyond the download.

Scale Switch holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 1, so its average is the more settled of the two.

Conversion Calculator Units ships an update every 2 months, Scale Switch every 4 months. The most recent releases landed on November 13, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Units | Scale Switch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scale-switch/id6740058611/reviews)** |
| Number of ratings | **5K** | 1 |
| Positive reviews | 82.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 2 MB |
| Requires iOS | **15.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Alberto Purpura](https://appshunter.io/developer/1661532927) |

## What reviewers say

### Conversion Calculator Units

[App page](https://appshunter.io/ios/app/conversion-calculator-units/id727632233)

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

**Highlights:** Converts over 140 units, Supports 12 conversion categories, Customizable themes, Drag and set unit positions, Add units to favorites, Share converted units via email

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 👍 User-friendly
- 🚀 Easy to use
- 💡 Helpful for learning metric system
- 👍 Great for conversions
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Ads disrupt usage
- 🐛 Difficult to change units
- 🐛 Lacks portrait mode
- 🐛 Upside-down orientation issues
- 🐛 Cluttered UI design

**Reported bugs**

- Ads not removed after purchase
- Incorrect unit conversions

**Requested features**

- Add pressure conversion units
- Include a basic calculator function
- Implement multi-language support
- Allow customization of unit order


### Scale Switch

[App page](https://appshunter.io/ios/app/scale-switch/id6740058611)

This utility app simplifies unit conversions with an intuitive interface. Easily convert between various units for time, data, temperature, area, volume, and more. It's designed for quick, reliable conversions on the go.

**Highlights:** Easy-to-use interface for conversions, Wide range of supported units, Converts time, data, temperature, area, volume, and more, Intuitive and clutter-free design, Quick and reliable results, Supports various measurement systems

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Conversion Calculator Units free?

Conversion Calculator Units is free to download, with in-app purchases available.

### Is Scale Switch free?

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

### Which has better reviews, Conversion Calculator Units or Scale Switch?

Scale Switch is rated higher. Conversion Calculator Units averages 4.7 out of 5 from 5K ratings, while Scale Switch averages 5.0 from 1 ratings.

### Do Conversion Calculator Units or Scale Switch have ads?

Conversion Calculator Units shows ads; Scale Switch does not.

### Which is updated more often, Conversion Calculator Units or Scale Switch?

Conversion Calculator Units ships an update every 2 months, and Scale Switch every 4 months. Most recently, Conversion Calculator Units was updated on November 13, 2026 and Scale Switch on October 30, 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.*