# Smart Unit Conversion vs PERFECTTENtool

The clearest difference is in-app purchases: PERFECTTENtool at none against Smart Unit Conversion's 1. PERFECTTENtool also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 15 months). On price, device support and iOS requirement there is nothing between them.

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

Smart Unit Conversion ships an update every 15 months, PERFECTTENtool every 5 weeks. The most recent releases landed on May 16, 2026 and February 27, 2026 respectively.

## The numbers

| Metric | Smart Unit Conversion | PERFECTTENtool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Every 5 weeks** |
| Size | 41 MB | 25 MB |
| Requires iOS | 13.4 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Yui Lau](https://appshunter.io/developer/1791465155) | [GOLDEN SMART HOME TECHNOLOGY CORPORATION](https://appshunter.io/developer/577780924) |

## 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 |


### PERFECTTENtool

[App page](https://appshunter.io/ios/app/perfecttentool/id6474987717)

**Features:** macOS Compatibility

**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 PERFECTTENtool free?

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

### Do Smart Unit Conversion or PERFECTTENtool have ads?

Smart Unit Conversion shows ads; PERFECTTENtool does not.

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

Smart Unit Conversion ships an update every 15 months, and PERFECTTENtool every 5 weeks. Most recently, Smart Unit Conversion was updated on May 16, 2026 and PERFECTTENtool on February 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*