# PDF Prime vs Ground Measure

The clearest difference is ads: Ground Measure at none against PDF Prime's shown. PDF Prime's advantage is iOS requirement (14.0 vs 18.0). On price, update cadence, 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.

PDF Prime ships an update fortnightly, Ground Measure every 2 weeks. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PDF Prime | Ground Measure |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Size | 17 MB | 3 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Art Fate E-Commerce Limited](https://appshunter.io/developer/1744856799) | [Andrew Bushby](https://appshunter.io/developer/1858603704) |

## What reviewers say

### PDF Prime

[App page](https://appshunter.io/ios/app/pdf-prime/id6667100922)

**In-app purchases:** none


### Ground Measure

[App page](https://appshunter.io/ios/app/ground-measure/id6756124337)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Prime free?

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

### Is Ground Measure free?

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

### Do PDF Prime or Ground Measure have ads?

PDF Prime shows ads; Ground Measure does not.

### Which is updated more often, PDF Prime or Ground Measure?

PDF Prime ships an update fortnightly, and Ground Measure every 2 weeks. Most recently, PDF Prime was updated on November 4, 2026 and Ground Measure 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.*