# Unit Converter vs ScanPDF+

The clearest difference is ads: ScanPDF+ at none against Unit Converter's shown. ScanPDF+ also leads on update cadence (every 9 days vs every 5 weeks) and iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Unit Converter ships an update every 5 weeks, ScanPDF+ every 9 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Unit Converter | ScanPDF+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/unit-converter-14-in-1/id1587655048/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 10 MB | 45 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Noadit, Inc.](https://appshunter.io/developer/1516754355) | [Hainan Yidaosan Technology Co., Ltd.](https://appshunter.io/developer/1764421732) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-14-in-1/id1587655048)

This tool provides fast and accurate conversions across 14 common physical unit categories. It supports metric, imperial, and traditional Chinese units, with customizable display styles for personalized use. Ideal for everyday and professional conversion needs.

**Highlights:** 14 unit categories, Metric, imperial, and Chinese units, Customizable display styles, Accurate conversions, Supports length, area, volume, mass, temperature, and more

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

**In-app purchases:** none


### ScanPDF+

[App page](https://appshunter.io/ios/app/scanpdf-plus/id6761295524)

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter free?

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

### Is ScanPDF+ free?

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

### Do Unit Converter or ScanPDF+ have ads?

Unit Converter shows ads; ScanPDF+ does not.

### Which is updated more often, Unit Converter or ScanPDF+?

Unit Converter ships an update every 5 weeks, and ScanPDF+ every 9 days. Most recently, Unit Converter was updated on November 3, 2026 and ScanPDF+ on November 9, 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.*