# Units vs UnitDeck

The clearest difference is ads: UnitDeck at none against Units's shown. UnitDeck also leads on update cadence (every 2 weeks vs monthly). Units's advantage is iOS requirement (13.5 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Units sells 3 one-off in-app purchases and UnitDeck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Units ships an update monthly, UnitDeck every 2 weeks. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Units | UnitDeck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (150 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews)** | — |
| Number of ratings | **150** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 3 MB |
| Requires iOS | **13.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Homegrown Software Ltd](https://appshunter.io/developer/406645730) | [建辉 刘](https://appshunter.io/developer/6790622804) |

## What reviewers say

### Units

[App page](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017)

Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.

**Highlights:** Hundreds of units across 43 categories, Daily updated currency exchange rates, Hide unused units, Reorder units and categories, Universal app support (iPhone, iPod touch, iPad)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |

**What reviewers like**

- 🚀 Efficient and fast conversions
- 👍 Comprehensive list of units
- 🔍 Customizable unit selection
- 💰 Free app with optional paid version
- 🔧 Useful for engineering and technical work

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🕰️ Outdated currency conversion rates
- 🔍 Too many unit categories, hard to navigate
- 💰 Ads in free version
- 📏 Ruler feature not accurate on some devices

**Reported bugs**

- Crashes when clearing input fields
- Numerical keypad covers conversion results
- Incompatibility issues with newer iOS versions
- Ruler measurements not accurate on all devices

**Requested features**

- Add nautical units (miles, knots)
- Improve currency conversion accuracy and updates
- Allow customization of visible unit categories
- Add more clothing/shoe size conversions
- Improve user interface and search functionality


### UnitDeck

[App page](https://appshunter.io/ios/app/unitdeck-work-unit-converter/id6792440865)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnitDeck Pro – Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is Units free?

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

### Is UnitDeck free?

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

### Do Units or UnitDeck have ads?

Units shows ads; UnitDeck does not.

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

Units ships an update monthly, and UnitDeck every 2 weeks. Most recently, Units was updated on October 14, 2026 and UnitDeck on October 2, 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.*