# Unit Converter vs PDF Reader

The clearest difference is ads: Unit Converter at none against PDF Reader's shown. Unit Converter also leads on update cadence (every 2 weeks vs every 2 months). PDF Reader's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Unit Converter sells 2 in-app purchases, starting at $2.49 per month and PDF Reader sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Unit Converter ships an update every 2 weeks, PDF Reader every 2 months. The most recent releases landed on October 30, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Unit Converter | PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 49 MB | 72 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Petrichka Yaroslav](https://appshunter.io/developer/1032980882) | [涛 夏](https://appshunter.io/developer/1689532127) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-univerter/id6738687525)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.49 | per month |
| Yearly Premium | $14.99 | per year |


### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-fileconvert/id6746630172)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Member | $5.99 | per month |
| Annual Member | $45.99 | per year |


## Frequently asked questions

### Is Unit Converter free?

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

### Is PDF Reader free?

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

### Do Unit Converter or PDF Reader have ads?

PDF Reader shows ads; Unit Converter does not.

### Which is updated more often, Unit Converter or PDF Reader?

Unit Converter ships an update every 2 weeks, and PDF Reader every 2 months. Most recently, Unit Converter was updated on October 30, 2026 and PDF Reader on November 8, 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.*