# CONVERT UNITS vs Unit Converter Simple

The clearest difference is update cadence: CONVERT UNITS at fortnightly against Unit Converter Simple's every 10 months. Unit Converter Simple's advantage is iOS requirement (13.0 vs 15.0). 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.

CONVERT UNITS ships an update fortnightly, Unit Converter Simple every 10 months. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CONVERT UNITS | Unit Converter Simple |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.4K ratings)](https://appshunter.io/ios/app/convert-units/id1114969241/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 10 months |
| Monetization | Ad-supported | — |
| Size | 21 MB | 18 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Adysseus](https://appshunter.io/developer/447444997) | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) |

## What reviewers say

### CONVERT UNITS

[App page](https://appshunter.io/ios/app/convert-units/id1114969241)

Easily convert between various units of measurement including length, weight, temperature, and currency. Features automatic currency updates, a vast selection of currencies, and customizable display options for accuracy and rounding. Optimized for multitasking on iPad and offers a beautiful dark design.

**Highlights:** Converts length, weight, speed, area, time, pressure, volume, power, fuel, temperature, data, and currency, Automatic currency updates, 160 currencies available, Multitasking enabled for iPad, Alphabetical quick links for units, Customizable startup categories, Adjustable accuracy and rounding

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

**In-app purchases:** none

**What reviewers like**

- 👍 Quick & easy to use
- 👍 Ease of use
- 👍 Simple and easy to use
- 👍 Well thought out and easy to use
- 👍 Excellent and very reliable

**What reviewers complain about**

- 🐛 Ads obstruct use
- 🐛 Subscription required to remove ads
- 🐛 Currency conversion not working

**Reported bugs**

- App got stuck, required uninstall/reinstall to fix
- Navigation issues, unable to get back to home page

**Requested features**

- Option to convert between functions (length to volume)
- Remember last conversion settings for each category


### Unit Converter Simple

[App page](https://appshunter.io/ios/app/unit-converter-simple/id1531846614)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CONVERT UNITS free?

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

### Is Unit Converter Simple free?

Unit Converter Simple is free to download, with no in-app purchases.

### Do CONVERT UNITS or Unit Converter Simple have ads?

Both CONVERT UNITS and Unit Converter Simple show ads.

### Which is updated more often, CONVERT UNITS or Unit Converter Simple?

CONVERT UNITS ships an update fortnightly, and Unit Converter Simple every 10 months. Most recently, CONVERT UNITS was updated on September 29, 2026 and Unit Converter Simple on September 21, 2026.

---

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