# All Units vs Unit Eater

The clearest difference is in-app purchases: All Units at none against Unit Eater's 2. All Units also leads on update cadence (every 3 days vs every 2 weeks). Unit Eater's advantage is ads (none vs shown) and device support (4 vs 2). On price there is nothing between them.

Both are free to download. Unit Eater sells 2 in-app purchases, starting at $0.99 per month. All Units asks for nothing beyond the download.

All Units ships an update every 3 days, Unit Eater every 2 weeks. The most recent releases landed on August 30, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | All Units | Unit Eater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/all-units/id1663552827/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 7 MB | 65 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Vladyslav Yarmak](https://appshunter.io/developer/1456545549) | [Tom Leon Schmidt](https://appshunter.io/developer/1634212175) |

## What reviewers say

### All Units

[App page](https://appshunter.io/ios/app/all-units/id1663552827)

This free utility app simplifies unit conversions for various measurements, saving time for technicians, students, and everyday users. It offers a wide range of conversion categories to make calculations easy and accurate.

**Highlights:** Unit conversion, Volume, Length, Mass, Temperature, Velocity, Time

**Features:** Vision Pro support

**In-app purchases:** none


### Unit Eater

[App page](https://appshunter.io/ios/app/unit-eater/id6742549723)

This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.

**Highlights:** Unit conversion and calculation, Custom unit definition, Extensive unit library, Calculation history, Customizable result format, Dark mode

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $0.99 | per month |
| Premium - Pay once | $3.99 | one-time |


## Frequently asked questions

### Is All Units free?

All Units is free to download, with no in-app purchases.

### Is Unit Eater free?

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

### Do All Units or Unit Eater have ads?

All Units shows ads; Unit Eater does not.

### Which is updated more often, All Units or Unit Eater?

All Units ships an update every 3 days, and Unit Eater every 2 weeks. Most recently, All Units was updated on August 30, 2026 and Unit Eater on September 11, 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.*