# Construction Master Pro Calc vs Span Calc

The clearest difference is rating: Construction Master Pro Calc at 4.8 against Span Calc's 2.9. Construction Master Pro Calc also leads on review sentiment (60% vs 30%) and ratings volume (40K vs 15). Span Calc's advantage is in-app purchases (none vs 20). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Construction Master Pro Calc sells 12 in-app purchases, starting at $3.69 per month. Span Calc asks for nothing beyond the download.

Construction Master Pro Calc holds the better App Store score, 4.8 against 2.9. That said, the two scores are not equally well evidenced: Construction Master Pro Calc has 40K ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 60% of Construction Master Pro Calc's written reviews are positive against 30% of Span Calc's.

Construction Master Pro Calc ships an update every 3 weeks, Span Calc every 10 days. The most recent releases landed on September 25, 2026 and August 13, 2026 respectively.

## The numbers

| Metric | Construction Master Pro Calc | Span Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (40K ratings)](https://appshunter.io/ios/app/construction-master-pro-calc/id370406446/reviews)** | [2.9 (15 ratings)](https://appshunter.io/ios/app/span-calc/id380481343/reviews) |
| Number of ratings | **40K** | 15 |
| Positive reviews | **60.1% of reviews** | 29.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#47** | — |
| Size | 111 MB | 168 MB |
| Requires iOS | 15.0 | **14.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [American Wood Council](https://appshunter.io/developer/380481346) |

## What reviewers say

### Construction Master Pro Calc

[App page](https://appshunter.io/ios/app/construction-master-pro-calc/id370406446)

**Currently charting:** #47 Top Grossing · Utilities (US App Store)

This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.

**Highlights:** Dimensional math and conversions, Right angle and rafter calculations, Area and volume solutions, Full trigonometric functions, Built-in user's guide and help, Save and share calculations, Project notes and attachments

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Full Access | $3.69 | per month |
| 1 Month Full Access | $4.99 | per month |
| 1 Month Full Access | $4.99 | per month |
| 1 Month Full Access | $4.99 | per month |
| CMPro Full Access | $9.99 | per year |
| 6 Months Full Access | $19.99 | per 6 months |
| 1 Year Full Access | $19.99 | per year |
| 1 Year Full Access | $29.99 | per year |
| 1 Year Full Access | $39.99 | per year |
| 1 Year Full Access | $39.99 | per year |
| 1 Year Full Access | $39.99 | per year |
| 1 Year Full Access | $39.99 | per year |

**What reviewers like**

- 🚀 Convenient and always available
- ⚙️ Comprehensive construction calculations
- 💪 Industry-standard tool
- 🔍 Accurate and reliable
- 📱 Integrates well with mobile devices

**What reviewers complain about**

- 💰 Subscription model too expensive
- 🔒 Locks data behind subscription
- 🔄 Forced to re-purchase after device changes
- 🔍 Lacks full metric support
- 🔧 Occasional UI/UX issues

**Reported bugs**

- Crashes or freezes on certain devices
- Calculation errors in some scenarios
- Inconsistent behavior after updates

**Requested features**

- Add metric unit support
- Offer one-time purchase option
- Improve backup and data transfer
- Add more customization options
- Enhance overall user experience


### Span Calc

[App page](https://appshunter.io/ios/app/span-calc/id380481343)

Calculate maximum horizontal spans for wood joists and rafters using various lumber species and grades. Compares multiple options for common loading conditions based on NDS® standards.

**Highlights:** Calculates joist and rafter spans, Supports all softwood and hardwood lumber, Uses 2021 NDS® for Wood Construction, Compares multiple species and grades, Handles common loading conditions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Construction Master Pro Calc free?

Construction Master Pro Calc is free to download, with in-app purchases available.

### Is Span Calc free?

Span Calc is free to download, with no in-app purchases.

### Which has better reviews, Construction Master Pro Calc or Span Calc?

Construction Master Pro Calc is rated higher. Construction Master Pro Calc averages 4.8 out of 5 from 40K ratings, while Span Calc averages 2.9 from 15 ratings.

### Do Construction Master Pro Calc or Span Calc have ads?

Neither Construction Master Pro Calc nor Span Calc shows ads.

### Which is updated more often, Construction Master Pro Calc or Span Calc?

Construction Master Pro Calc ships an update every 3 weeks, and Span Calc every 10 days. Most recently, Construction Master Pro Calc was updated on September 25, 2026 and Span Calc on August 13, 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.*