# Construction Master Pro Calc vs Trigonometry Help

The clearest difference is price: Construction Master Pro Calc at Free against Trigonometry Help's $1.99. Construction Master Pro Calc also leads on update cadence (every 3 weeks vs every 13 months) and ratings volume (41K vs 481). Trigonometry Help's advantage is review sentiment (91% vs 60%) and iOS requirement (10.0 vs 15.0). On rating, ads, in-app purchases and monetization model there is nothing between them.

Construction Master Pro Calc is free to download; Trigonometry Help costs $1.99 up front. Construction Master Pro Calc sells 4 in-app purchases, starting at $4.99 per month and Trigonometry Help sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Construction Master Pro Calc against 4.7 for Trigonometry Help. That said, the two scores are not equally well evidenced: Construction Master Pro Calc has 41K ratings behind it against 481, so its average is the more settled of the two. Written reviews are what separate them: 60% of Construction Master Pro Calc's written reviews are positive against 91% of Trigonometry Help's.

Construction Master Pro Calc ships an update every 3 weeks, Trigonometry Help every 13 months. The most recent releases landed on November 9, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Construction Master Pro Calc | Trigonometry Help |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.8 (41K ratings)](https://appshunter.io/ios/app/construction-master-pro-calc/id370406446/reviews)** | [4.7 (481 ratings)](https://appshunter.io/ios/app/trigonometry-help/id411415648/reviews) |
| Number of ratings | **41K** | 481 |
| Positive reviews | 60.2% of reviews | **91.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 13 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#47** | — |
| Size | 111 MB | 21 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | +4 |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [Armchair Engineering](https://appshunter.io/developer/398901339) |

## 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 (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Full Access | $4.99 | per month |
| 1 Month Full Access | $4.99 | per month |
| 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


### Trigonometry Help

[App page](https://appshunter.io/ios/app/trigonometry-help/id411415648)

This app helps you quickly solve for unknown angles and sides of right-angled triangles. It provides a workings view for understanding the math, a scale drawing of the triangle, and a reference for basic trigonometric formulas. You can input angles in various formats and choose your desired decimal precision.

**Highlights:** Solve right-angled triangles, Workings view for solutions, Scale drawing of solved triangle, Basic trig formulae reference, Multiple angle input formats, Customizable decimal places

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trig Help Premium | $0.99 | one-time |
| Trig Help Premium | $1.99 | one-time |
| Trig Help Premium | $3.99 | one-time |

**What reviewers like**

- 🚀 Quick and easy to use
- 👍 User-friendly interface
- 🔧 Helpful for tradesmen and professionals
- ⚙️ Accurate calculations
- 🔍 Convenient for on-site use

**What reviewers complain about**

- 🔢 Limited to right-angled triangles only
- 🔍 Lacks advanced trig functions
- 🔀 No option to rotate/flip the triangle view

**Reported bugs**

- Inconsistent performance on older devices
- Occasional crashes or freezes

**Requested features**

- Support for irregular triangles
- Ability to show step-by-step workings
- Option to switch between degrees/minutes/seconds and decimal values


## Frequently asked questions

### Is Construction Master Pro Calc free?

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

### Is Trigonometry Help free?

Trigonometry Help costs $1.99, and also offers in-app purchases.

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

Construction Master Pro Calc is rated higher. Construction Master Pro Calc averages 4.8 out of 5 from 41K ratings, while Trigonometry Help averages 4.7 from 481 ratings.

### Do Construction Master Pro Calc or Trigonometry Help have ads?

Neither Construction Master Pro Calc nor Trigonometry Help shows ads.

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

Construction Master Pro Calc ships an update every 3 weeks, and Trigonometry Help every 13 months. Most recently, Construction Master Pro Calc was updated on November 9, 2026 and Trigonometry Help on November 6, 2026.

---

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