# Units vs eBookSort

The clearest difference is price: Units at Free against eBookSort's $0.99. Units also leads on ratings volume (150 vs 3) and iOS requirement (13.5 vs 17.0). eBookSort's advantage is in-app purchases (none vs 3) and ads (none vs shown). On rating, update cadence and device support there is nothing between them.

Units is free to download; eBookSort costs $0.99 up front. Units sells 3 one-off in-app purchases. eBookSort asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.6 for Units against 3.7 for eBookSort. That said, the two scores are not equally well evidenced: Units has 150 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 60% of Units's written reviews are positive against 75% of eBookSort's.

Units ships an update monthly, eBookSort fortnightly. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Units | eBookSort |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [3.6 (150 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ebooksort/id6759209795/reviews)** |
| Number of ratings | **150** | 3 |
| Positive reviews | 60.0% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 2 MB | 4 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) | [GoGIS LLC](https://appshunter.io/developer/1876041562) |

## 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


### eBookSort

[App page](https://appshunter.io/ios/app/ebooksort/id6759209795)

Organize your digital book collections from Kindle and Apple Books. Automatically categorizes titles by genre and identifies book series for easier browsing. Your library data stays private and accessible offline.

**Highlights:** Automatic genre sorting, Book series identification, Combined library view, Offline functionality, On-device processing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Units free?

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

### Is eBookSort free?

eBookSort costs $0.99, with no in-app purchases.

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

eBookSort is rated higher. Units averages 3.6 out of 5 from 150 ratings, while eBookSort averages 3.7 from 3 ratings.

### Do Units or eBookSort have ads?

Units shows ads; eBookSort does not.

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

Units ships an update monthly, and eBookSort fortnightly. Most recently, Units was updated on October 15, 2026 and eBookSort on October 10, 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.*