# Smart Unit Conversion vs Chroma Lab by RD Skynet

The clearest difference is in-app purchases: Chroma Lab by RD Skynet at none against Smart Unit Conversion's 1. Chroma Lab by RD Skynet also leads on ads (none vs shown) and update cadence (every 3 days vs every 15 months). Smart Unit Conversion's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 26.0). On price there is nothing between them.

Both are free to download. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year. Chroma Lab by RD Skynet asks for nothing beyond the download.

Smart Unit Conversion ships an update every 15 months, Chroma Lab by RD Skynet every 3 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Smart Unit Conversion | Chroma Lab by RD Skynet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Every 3 days** |
| Size | 41 MB | 1 MB |
| Requires iOS | **13.4** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Yui Lau](https://appshunter.io/developer/1791465155) | [Raghul S](https://appshunter.io/developer/1344469407) |

## What reviewers say

### Smart Unit Conversion

[App page](https://appshunter.io/ios/app/smart-unit-conversion/id1643381985)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year | $1.99 | per year |


### Chroma Lab by RD Skynet

[App page](https://appshunter.io/ios/app/chroma-lab-by-rd-skynet/id6785187640)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Unit Conversion free?

Smart Unit Conversion is free to download, with in-app purchases available.

### Is Chroma Lab by RD Skynet free?

Chroma Lab by RD Skynet is free to download, with no in-app purchases.

### Do Smart Unit Conversion or Chroma Lab by RD Skynet have ads?

Smart Unit Conversion shows ads; Chroma Lab by RD Skynet does not.

### Which is updated more often, Smart Unit Conversion or Chroma Lab by RD Skynet?

Smart Unit Conversion ships an update every 15 months, and Chroma Lab by RD Skynet every 3 days. Most recently, Smart Unit Conversion was updated on October 27, 2026 and Chroma Lab by RD Skynet on October 31, 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.*