# Kieron's Converter vs Sigma Charge

The clearest difference is update cadence: Sigma Charge at monthly against Kieron's Converter's every 6 months. Sigma Charge also leads on iOS requirement (13.4 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kieron's Converter ships an update every 6 months, Sigma Charge monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Kieron's Converter | Sigma Charge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kierons-converter/id6472617307/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Free | — |
| Size | 1 MB | 54 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kieron Younis](https://appshunter.io/developer/1717322416) | [Sigma Systems, Mmc](https://appshunter.io/developer/1726343396) |

## What reviewers say

### Kieron's Converter

[App page](https://appshunter.io/ios/app/kierons-converter/id6472617307)

Easily convert between common units for temperature, distance, weight, and volume using intuitive sliders. This utility app offers a straightforward way to perform everyday conversions.

**Highlights:** Unit conversion, Temperature conversion, Distance conversion, Weight conversion, Volume conversion, Slider interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Sigma Charge

[App page](https://appshunter.io/ios/app/sigma-charge/id6476268128)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kieron's Converter free?

Kieron's Converter is free to download, with no in-app purchases.

### Is Sigma Charge free?

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

### Do Kieron's Converter or Sigma Charge have ads?

Neither Kieron's Converter nor Sigma Charge shows ads.

### Which is updated more often, Kieron's Converter or Sigma Charge?

Kieron's Converter ships an update every 6 months, and Sigma Charge monthly. Most recently, Kieron's Converter was updated on October 24, 2026 and Sigma Charge on October 25, 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.*