# CONVERT UNITS vs Simple Unit Converter App

The clearest difference is price: CONVERT UNITS at Free against Simple Unit Converter App's $1.99. CONVERT UNITS also leads on update cadence (weekly vs every 3 months) and ratings volume (1.4K vs 1). Simple Unit Converter App's advantage is rating (5.0 vs 4.7). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

CONVERT UNITS is free to download; Simple Unit Converter App costs $1.99 up front. CONVERT UNITS sells 2 in-app purchases, starting at $0.99 per month and Simple Unit Converter App sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Simple Unit Converter App holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CONVERT UNITS has 1.4K ratings behind it against 1, so its average is the more settled of the two.

CONVERT UNITS ships an update weekly, Simple Unit Converter App every 3 months. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | CONVERT UNITS | Simple Unit Converter App |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.7 (1.4K ratings)](https://appshunter.io/ios/app/convert-units/id1114969241/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simple-unit-converter-app/id1531584085/reviews)** |
| Number of ratings | **1.4K** | 1 |
| Positive reviews | 75.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | **Ad-supported** | Paid |
| Size | 22 MB | 4 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Adysseus](https://appshunter.io/developer/447444997) | [CranialDev.LLC](https://appshunter.io/developer/1445325464) |

## 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 (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | per month |
| Remove ads | $19.99 | one-time |

**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


### Simple Unit Converter App

[App page](https://appshunter.io/ios/app/simple-unit-converter-app/id1531584085)

Easily convert between a vast range of measurement units, including acceleration, mass, temperature, and volume. This tool supports numerous categories to help you with everyday conversions and specialized needs.

**Highlights:** Wide array of unit types, Converts acceleration, mass, temperature, volume, and more, Supports numerous categories, User-requested additions, Intuitive interface

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NoAds | $0.99 | one-time |
| Small Tip | $1.99 | one-time |
| Generous Tip | $4.99 | one-time |


## Frequently asked questions

### Is CONVERT UNITS free?

CONVERT UNITS is free to download, with in-app purchases available.

### Is Simple Unit Converter App free?

Simple Unit Converter App costs $1.99, and also offers in-app purchases.

### Which has better reviews, CONVERT UNITS or Simple Unit Converter App?

Simple Unit Converter App is rated higher. CONVERT UNITS averages 4.7 out of 5 from 1.4K ratings, while Simple Unit Converter App averages 5.0 from 1 ratings.

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

Both CONVERT UNITS and Simple Unit Converter App show ads.

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

CONVERT UNITS ships an update weekly, and Simple Unit Converter App every 3 months. Most recently, CONVERT UNITS was updated on October 16, 2026 and Simple Unit Converter App on October 5, 2026.

---

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