# Unit Converter | Converter4U vs CONVERT UNITS

The clearest difference is ads: Unit Converter | Converter4U at none against CONVERT UNITS's shown. Unit Converter | Converter4U also leads on monetization model (free vs ad-supported) and iOS requirement (9.0 vs 15.0). CONVERT UNITS's advantage is review sentiment (75% vs 57%) and update cadence (every 6 weeks vs every 4 months). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.6 for Unit Converter | Converter4U against 4.7 for CONVERT UNITS. That said, the two scores are not equally well evidenced: CONVERT UNITS has 1.4K ratings behind it against 194, so its average is the more settled of the two. Written reviews are what separate them: 57% of Unit Converter | Converter4U's written reviews are positive against 75% of CONVERT UNITS's.

Unit Converter | Converter4U ships an update every 4 months, CONVERT UNITS every 6 weeks. The most recent releases landed on August 14, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Unit Converter | Converter4U | CONVERT UNITS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (194 ratings)](https://appshunter.io/ios/app/unit-converter-converter4u/id620969788/reviews) | **[4.7 (1.4K ratings)](https://appshunter.io/ios/app/convert-units/id1114969241/reviews)** |
| Number of ratings | 194 | **1.4K** |
| Positive reviews | 57.1% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 51 MB | 21 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Adysseus](https://appshunter.io/developer/447444997) |

## What reviewers say

### Unit Converter | Converter4U

[App page](https://appshunter.io/ios/app/unit-converter-converter4u/id620969788)

This app provides a powerful and intuitive way to convert between a wide range of units, including length, weight, temperature, and more. It offers simultaneous conversion of multiple units and customizable options for a personalized experience. Get instant, accurate results for all your conversion needs.

**Highlights:** Simultaneous multi-unit conversion, Customizable unit options, Copy converted values to clipboard, Supports numerous measurement categories, Intuitive and user-friendly interface

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Unit Converter | Converter4U free?

Unit Converter | Converter4U is free to download, with no in-app purchases.

### Is CONVERT UNITS free?

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

### Which has better reviews, Unit Converter | Converter4U or CONVERT UNITS?

CONVERT UNITS is rated higher. Unit Converter | Converter4U averages 4.6 out of 5 from 194 ratings, while CONVERT UNITS averages 4.7 from 1.4K ratings.

### Do Unit Converter | Converter4U or CONVERT UNITS have ads?

CONVERT UNITS shows ads; Unit Converter | Converter4U does not.

### Which is updated more often, Unit Converter | Converter4U or CONVERT UNITS?

Unit Converter | Converter4U ships an update every 4 months, and CONVERT UNITS every 6 weeks. Most recently, Unit Converter | Converter4U was updated on August 14, 2026 and CONVERT UNITS on September 25, 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.*