# Hammer Construction Calculator vs PDFReader

The clearest difference is ads: Hammer Construction Calculator at none against PDFReader's shown. Hammer Construction Calculator also leads on device support (3 vs 1) and iOS requirement (16.0 vs 18.6). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Hammer Construction Calculator sells 2 in-app purchases, starting at $3.99 per month and PDFReader sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Hammer Construction Calculator ships an update every 6 weeks, PDFReader every 2 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Hammer Construction Calculator | PDFReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/hammer-construction-calculator/id6747408084/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 14 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [garrett hiebert](https://appshunter.io/developer/1821314687) | [克 谢](https://appshunter.io/developer/1722475771) |

## What reviewers say

### Hammer Construction Calculator

[App page](https://appshunter.io/ios/app/hammer-construction-calculator/id6747408084)

This app provides advanced construction calculations, including feet-inch-fraction math and specialized tools for various trades. It also offers material takeoff and PDF quote generation, with features for jobsite planning and notes.

**Highlights:** Feet-inch-fraction math with metric conversion, 20 specialized trade calculators with diagrams, Material takeoff and PDF quote generation, Jobsite plans and notes with blueprint support, Offline functionality, Customizable rounding and unit support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HammerCalc Monthly | $3.99 | per month |
| HammerCalc Yearly | $24.99 | per year |


### PDFReader

[App page](https://appshunter.io/ios/app/pdfreader-ai-pdf-assistant/id6758230344)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $9.99 | per month |
| Yearly Pro | $49.99 | per year |


## Frequently asked questions

### Is Hammer Construction Calculator free?

Hammer Construction Calculator is free to download, with in-app purchases available.

### Is PDFReader free?

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

### Do Hammer Construction Calculator or PDFReader have ads?

PDFReader shows ads; Hammer Construction Calculator does not.

### Which is updated more often, Hammer Construction Calculator or PDFReader?

Hammer Construction Calculator ships an update every 6 weeks, and PDFReader every 2 months. Most recently, Hammer Construction Calculator was updated on October 7, 2026 and PDFReader on October 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.*