# Rafter Help vs Construction Calculator Master

The clearest difference is price: Construction Calculator Master at Free against Rafter Help's $1.99. Construction Calculator Master also leads on review sentiment (70% vs 40%) and update cadence (fortnightly vs every 5 months). Rafter Help's advantage is in-app purchases (none vs 10) and rating (4.5 vs 4.3). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Construction Calculator Master is free to download; Rafter Help costs $1.99 up front. Construction Calculator Master sells 10 in-app purchases, starting at $0.99 per 7 days. Rafter Help asks for nothing beyond the download.

Rafter Help holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 212 and 436 respectively. Written reviews complicate that: 40% of Rafter Help's written reviews are positive against 70% of Construction Calculator Master's, so the app with the better star average is not the one people write more warmly about.

Rafter Help ships an update every 5 months, Construction Calculator Master fortnightly. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Rafter Help | Construction Calculator Master |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.5 (212 ratings)](https://appshunter.io/ios/app/rafter-help/id1006188060/reviews)** | [4.3 (436 ratings)](https://appshunter.io/ios/app/construction-calculator-master/id1623283646/reviews) |
| Number of ratings | 212 | **436** |
| Positive reviews | 40.0% of reviews | **70.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 37 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Uncaught Exception Inc](https://appshunter.io/developer/1457411536) |

## What reviewers say

### Rafter Help

[App page](https://appshunter.io/ios/app/rafter-help/id1006188060)

This app simplifies roof construction by calculating rafter lengths and related measurements. It supports various input formats for pitch and length, offering both quick calculations for gable roofs and advanced control for more complex needs.

**Highlights:** Calculate rafter length and associated values, Determine roof pitch, rafter lengths, and ridge height, Supports gable roofs, Advanced calculation options, Multiple input formats for pitch (radians, degrees, DMS, rise/run), Flexible length units (mm, cm, inches, feet), Customizable decimal places

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to understand
- 👍 Accurate measurements
- 👍 Gives rafter length with deduction
- 👍 Useful for setting out measurements
- 👍 First class, use it all the time

**What reviewers complain about**

- 👎 Cannot add 1/4 inch
- 👎 Inaccurate and unconvincing
- 👎 Really limited functionality
- 👎 Doesn’t give cut angles, only lengths
- 👎 Doesn’t give necessary measurements for rafters

**Reported bugs**

- Cannot add 1/4 inch
- Missing decimal point on keypad
- Major error in basic gable drawing
- App won't open, says 'waiting'

**Requested features**

- Add 1/4 inch input
- Provide cut angles
- Include decimal point on keypad
- Support hip rafters
- Correct drawing error for basic gable


### Construction Calculator Master

[App page](https://appshunter.io/ios/app/construction-calculator-master/id1623283646)

This advanced construction calculator simplifies complex measurements for builders, carpenters, and remodelers. It offers a comprehensive suite of math functions, multi-unit support, and visual aids for calculations involving fractions, trigonometry, and rafters. Reduce errors and save time with its intuitive interface and customizable options.

**Highlights:** Multi-unit fraction support (feet, inches, yards, metric), Trigonometric functions with visualization, Rafter and triangle visualization, Imperial, Metric, and US Fractional units, Customizable fraction resolution, Memory and history functions, Dark mode support

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week | $0.99 | per 7 days |
| 1 week | $2.99 | per 7 days |
| 1 week | $2.99 | per 7 days |
| 1 month | $3.99 | per month |
| 1 week | $4.99 | per 7 days |
| 1 month | $5.99 | per month |
| 1 month | $5.99 | per month |
| 1 month | $9.99 | per month |
| 1 year | $29.99 | per year |
| 1 year | $49.99 | per year |


## Frequently asked questions

### Is Rafter Help free?

Rafter Help costs $1.99, with no in-app purchases.

### Is Construction Calculator Master free?

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

### Which has better reviews, Rafter Help or Construction Calculator Master?

Rafter Help is rated higher. Rafter Help averages 4.5 out of 5 from 212 ratings, while Construction Calculator Master averages 4.3 from 436 ratings.

### Do Rafter Help or Construction Calculator Master have ads?

Neither Rafter Help nor Construction Calculator Master shows ads.

### Which is updated more often, Rafter Help or Construction Calculator Master?

Rafter Help ships an update every 5 months, and Construction Calculator Master fortnightly. Most recently, Rafter Help was updated on October 17, 2026 and Construction Calculator Master on October 6, 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.*