# Units vs pdftoimages

The clearest difference is in-app purchases: pdftoimages at none against Units's 3. Units's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 26.2). On price and ads there is nothing between them.

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

## The numbers

| Metric | Units | pdftoimages |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (262 ratings)](https://appshunter.io/ios/app/units-unit-converter/id1527329982/reviews)** | — |
| Number of ratings | **262** | — |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 2 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andreas Maier](https://appshunter.io/developer/454364359) | [Tamer Ali](https://appshunter.io/developer/1883713502) |

## What reviewers say

### 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 |


### pdftoimages

[App page](https://appshunter.io/ios/app/pdftoimages/id6761090049)

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

**In-app purchases:** none


## Frequently asked questions

### Is Units free?

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

### Is pdftoimages free?

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

### Do Units or pdftoimages have ads?

Neither Units nor pdftoimages shows ads.

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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.*