# CONVERT UNITS vs Units

The clearest difference is in-app purchases: CONVERT UNITS at none against Units's 3. CONVERT UNITS also leads on review sentiment (75% vs 45%) and ratings volume (1.4K vs 261). Units's advantage is ads (none vs shown) and rating (4.9 vs 4.7). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Units sells 3 in-app purchases, starting at $0.99 per month. CONVERT UNITS asks for nothing beyond the download.

Units holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: CONVERT UNITS has 1.4K ratings behind it against 261, so its average is the more settled of the two. Written reviews complicate that: 75% of CONVERT UNITS's written reviews are positive against 45% of Units's, so the app with the better star average is not the one people write more warmly about.

CONVERT UNITS ships an update every 6 weeks, Units every 5 weeks. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | CONVERT UNITS | Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.4K ratings)](https://appshunter.io/ios/app/convert-units/id1114969241/reviews) | **[4.9 (261 ratings)](https://appshunter.io/ios/app/units-unit-converter/id1527329982/reviews)** |
| Number of ratings | **1.4K** | 261 |
| Positive reviews | **75.0% of reviews** | 45.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 21 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | +4 | 4+ |
| Developer | [Adysseus](https://appshunter.io/developer/447444997) | [Andreas Maier](https://appshunter.io/developer/454364359) |

## 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


### Units

[App page](https://appshunter.io/ios/app/units-unit-converter/id1527329982)

Easily convert between a wide range of measurement units and currencies. Features a clear and simple interface for quick conversions of length, mass, volume, speed, and more. Supports popular currencies and common units for everyday use.

**Highlights:** Extensive unit conversions, Multiple currency support, Easy and clear handling, Converts length, mass, volume, Supports speed, area, pressure, Converts time and temperature

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $4.99 | per year |
| One time purchase | $9.99 | one-time |


## Frequently asked questions

### Is CONVERT UNITS free?

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

### Is Units free?

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

### Which has better reviews, CONVERT UNITS or Units?

Units is rated higher. CONVERT UNITS averages 4.7 out of 5 from 1.4K ratings, while Units averages 4.9 from 261 ratings.

### Do CONVERT UNITS or Units have ads?

CONVERT UNITS shows ads; Units does not.

### Which is updated more often, CONVERT UNITS or Units?

CONVERT UNITS ships an update every 6 weeks, and Units every 5 weeks. Most recently, CONVERT UNITS was updated on September 21, 2026 and Units on September 23, 2026.

---

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