# Calc Engine vs Hammer Construction Calculator

The clearest difference is update cadence: Calc Engine at daily against Hammer Construction Calculator's every 2 months. Calc Engine also leads on monetization model (free vs free with in-app purchases) and ratings volume (4 vs 1). Hammer Construction Calculator's advantage is iOS requirement (16.0 vs 18). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Calc Engine sells 1 one-off in-app purchase and Hammer Construction Calculator sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Calc Engine against 5.0 for Hammer Construction Calculator. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Calc Engine ships an update daily, Hammer Construction Calculator every 2 months. The most recent releases landed on August 31, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Calc Engine | Hammer Construction Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/calc-engine/id1061766849/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/hammer-construction-calculator/id6747408084/reviews) |
| Number of ratings | **4** | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 39 MB |
| Requires iOS | 18 | **16.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [VersaEdge Software, LLC](https://appshunter.io/developer/301294952) | [garrett hiebert](https://appshunter.io/developer/1821314687) |

## What reviewers say

### Calc Engine

[App page](https://appshunter.io/ios/app/calc-engine/id1061766849)

A highly customizable calculator with advanced features like graphing, equation solving, and unit conversion. Design your own keyboards and functions to streamline your workflow across Apple devices.

**Highlights:** Customizable keyboard layouts, User-defined functions and constants, Live equation graphing, Equation solving, Extensive unit conversions, Programmer mode (hex, binary, octal), Cross-device syncing

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc Engine+ | $9.99 | one-time |


### 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 |


## Frequently asked questions

### Is Calc Engine free?

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

### Is Hammer Construction Calculator free?

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

### Which has better reviews, Calc Engine or Hammer Construction Calculator?

Calc Engine and Hammer Construction Calculator are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Calc Engine or Hammer Construction Calculator have ads?

Neither Calc Engine nor Hammer Construction Calculator shows ads.

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

Calc Engine ships an update daily, and Hammer Construction Calculator every 2 months. Most recently, Calc Engine was updated on August 31, 2026 and Hammer Construction Calculator on September 20, 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.*