# Hammer Construction Calculator vs K4 Tools

The clearest difference is rating: K4 Tools at 5.0 against Hammer Construction Calculator's 3.0. K4 Tools also leads on in-app purchases (none vs 2). Hammer Construction Calculator's advantage is ratings volume (3 vs 1) and iOS requirement (16.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Hammer Construction Calculator sells 2 in-app purchases, starting at $3.99 per month. K4 Tools asks for nothing beyond the download.

K4 Tools holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Hammer Construction Calculator ships an update every 6 weeks, K4 Tools monthly. The most recent releases landed on October 7, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Hammer Construction Calculator | K4 Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/hammer-construction-calculator/id6747408084/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/k4-tools/id6758374210/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 39 MB | 31 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [garrett hiebert](https://appshunter.io/developer/1821314687) | [James Everett](https://appshunter.io/developer/1015137244) |

## 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 |


### K4 Tools

[App page](https://appshunter.io/ios/app/k4-tools/id6758374210)

This app assists flight crews with inflight fuel and time calculations, integrating with flight plans. Features include scanning flight data, calculating duty and rest periods, and managing crew breaks. It also helps verify fuel accuracy and pre-flight weather conditions.

**Highlights:** Magic Scanner for FMS data, Duty/Rest period calculation, Crew break scheduling, Fuel receipt verification, Pre-flight weather checks, iPad optimized interface

**In-app purchases:** none


## Frequently asked questions

### Is Hammer Construction Calculator free?

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

### Is K4 Tools free?

K4 Tools is free to download, with no in-app purchases.

### Which has better reviews, Hammer Construction Calculator or K4 Tools?

K4 Tools is rated higher. Hammer Construction Calculator averages 3.0 out of 5 from 3 ratings, while K4 Tools averages 5.0 from 1 ratings.

### Do Hammer Construction Calculator or K4 Tools have ads?

Neither Hammer Construction Calculator nor K4 Tools shows ads.

### Which is updated more often, Hammer Construction Calculator or K4 Tools?

Hammer Construction Calculator ships an update every 6 weeks, and K4 Tools monthly. Most recently, Hammer Construction Calculator was updated on October 7, 2026 and K4 Tools on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*