# PDF Converter vs Ring Sizer & Ruler

The clearest difference is update cadence: PDF Converter at every 3 days against Ring Sizer & Ruler's every 2 months. PDF Converter also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $4.99 per month and Ring Sizer & Ruler sells 4 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Converter ships an update every 3 days, Ring Sizer & Ruler every 2 months. Both last shipped on October 28, 2026.

## The numbers

| Metric | PDF Converter | Ring Sizer & Ruler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Size | 81 MB | 46 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMMA MOLINA](https://appshunter.io/developer/1833286076) | [VAST FLOW, TOO](https://appshunter.io/developer/1754861329) |

## What reviewers say

### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-scan/id6754535699)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $25.99 | per year |


### Ring Sizer & Ruler

[App page](https://appshunter.io/ios/app/ring-sizer-and-ruler-mesurix/id6776475871)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly \| Mesurix Pro | $9.99 | per 7 days |
| Yearly \| Mesurix Pro | $39.99 | per year |
| Lifetime Access | $14.99 | one-time |
| Mesurix Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is PDF Converter free?

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

### Is Ring Sizer & Ruler free?

Ring Sizer & Ruler is free to download, with in-app purchases available.

### Do PDF Converter or Ring Sizer & Ruler have ads?

Neither PDF Converter nor Ring Sizer & Ruler shows ads.

### Which is updated more often, PDF Converter or Ring Sizer & Ruler?

PDF Converter ships an update every 3 days, and Ring Sizer & Ruler every 2 months. Most recently, PDF Converter was updated on October 28, 2026 and Ring Sizer & Ruler on October 28, 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.*