# Convert vs Units

The clearest difference is ads: Units at none against Convert's shown. Units also leads on update cadence (every 5 weeks vs every 3 months). Convert's advantage is review sentiment (70% vs 45%) and iOS requirement (12.0 vs 15.0). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Convert sells 2 in-app purchases, starting at $0.99 per 6 months and Units sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Units holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 126 and 262 respectively. Written reviews complicate that: 70% of Convert'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 ships an update every 3 months, Units every 5 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Convert | Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (126 ratings)](https://appshunter.io/ios/app/convert-unit-and-currency/id884044389/reviews) | **[4.9 (262 ratings)](https://appshunter.io/ios/app/units-unit-converter/id1527329982/reviews)** |
| Number of ratings | 126 | **262** |
| Positive reviews | **69.8% of reviews** | 45.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 39 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Raphael Odermatt](https://appshunter.io/developer/403027529) | [Andreas Maier](https://appshunter.io/developer/454364359) |

## What reviewers say

### Convert

[App page](https://appshunter.io/ios/app/convert-unit-and-currency/id884044389)

Easily convert hundreds of physical units and dimensions with this powerful tool. It also includes a currency converter with daily updated exchange rates for over 130 countries and is available on Apple Watch.

**Highlights:** Unit conversion for 398 units, Currency conversion with daily rates, Integrated calculator, Apple Watch support, History charts for currencies, Copy & Paste functionality

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Features | $0.99 | per 6 months |
| Advanced Features | $1.99 | one-time |


### 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 free?

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

### Is Units free?

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

### Which has better reviews, Convert or Units?

Units is rated higher. Convert averages 4.7 out of 5 from 126 ratings, while Units averages 4.9 from 262 ratings.

### Do Convert or Units have ads?

Convert shows ads; Units does not.

### Which is updated more often, Convert or Units?

Convert ships an update every 3 months, and Units every 5 weeks. Most recently, Convert was updated on November 1, 2026 and Units on November 3, 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.*