# Conversion Calculator vs Scale Switch

The clearest difference is in-app purchases: Scale Switch at none against Conversion Calculator's 1. Scale Switch also leads on rating (5.0 vs 4.8). Conversion Calculator's advantage is ratings volume (165 vs 1) and update cadence (every 5 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Conversion Calculator 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 4.8. That said, the two scores are not equally well evidenced: Conversion Calculator has 165 ratings behind it against 1, so its average is the more settled of the two.

Conversion Calculator ships an update every 5 weeks, Scale Switch every 4 months. The most recent releases landed on November 12, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Conversion Calculator | Scale Switch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (165 ratings)](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scale-switch/id6740058611/reviews)** |
| Number of ratings | **165** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 10 MB | 2 MB |
| Requires iOS | **17.0** | 18.1 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) | [Alberto Purpura](https://appshunter.io/developer/1661532927) |

## What reviewers say

### Conversion Calculator

[App page](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523)

This utility app offers a comprehensive unit conversion tool for various needs, including cooking, travel, and work. It supports over 120 units across 15 categories, with metric and imperial options. The app works offline and allows for customization of displayed decimals and category order.

**Highlights:** 15 categories and 120+ units, Metric and imperial conversions, Cooking, weight, length, temperature, and more, Offline functionality, Customizable decimal display, Apple Watch app

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access forever | $8.99 | one-time |


### 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 free?

Conversion Calculator 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 or Scale Switch?

Scale Switch is rated higher. Conversion Calculator averages 4.8 out of 5 from 165 ratings, while Scale Switch averages 5.0 from 1 ratings.

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

Neither Conversion Calculator nor Scale Switch shows ads.

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

Conversion Calculator ships an update every 5 weeks, and Scale Switch every 4 months. Most recently, Conversion Calculator was updated on November 12, 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.*