# Smart Unit Conversion vs 彩煉者

The clearest difference is ads: 彩煉者 at none against Smart Unit Conversion's shown. 彩煉者 also leads on update cadence (monthly vs every 15 months). Smart Unit Conversion's advantage is iOS requirement (13.4 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year and 彩煉者 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Smart Unit Conversion ships an update every 15 months, 彩煉者 monthly. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Smart Unit Conversion | 彩煉者 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Monthly** |
| Size | 41 MB | 28 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Yui Lau](https://appshunter.io/developer/1791465155) | [Kin Tong Lee](https://appshunter.io/developer/1833051031) |

## What reviewers say

### Smart Unit Conversion

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

**Features:** macOS Compatibility

**In-app purchases (1)**

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


### 彩煉者

[App page](https://appshunter.io/ios/app/id6750487959)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $11.99 | one-time |


## Frequently asked questions

### Is Smart Unit Conversion free?

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

### Is 彩煉者 free?

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

### Do Smart Unit Conversion or 彩煉者 have ads?

Smart Unit Conversion shows ads; 彩煉者 does not.

### Which is updated more often, Smart Unit Conversion or 彩煉者?

Smart Unit Conversion ships an update every 15 months, and 彩煉者 monthly. Most recently, Smart Unit Conversion was updated on October 8, 2026 and 彩煉者 on October 6, 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.*