# Construction Master Pro Calc vs Premix Calculator (2 Stroke)

The clearest difference is rating: Construction Master Pro Calc at 4.8 against Premix Calculator (2 Stroke)'s 4.3. Construction Master Pro Calc also leads on ratings volume (40K vs 11) and update cadence (every 3 weeks vs every 3 months). Premix Calculator (2 Stroke)'s advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model 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 and Premix Calculator (2 Stroke) sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Construction Master Pro Calc holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Construction Master Pro Calc has 40K ratings behind it against 11, so its average is the more settled of the two.

Construction Master Pro Calc ships an update every 3 weeks, Premix Calculator (2 Stroke) every 3 months. Both last shipped on October 21, 2026.

## The numbers

| Metric | Construction Master Pro Calc | Premix Calculator (2 Stroke) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (40K ratings)](https://appshunter.io/ios/app/construction-master-pro-calc/id370406446/reviews)** | [4.3 (11 ratings)](https://appshunter.io/ios/app/premix-calculator-2-stroke/id6749201236/reviews) |
| Number of ratings | **40K** | 11 |
| Positive reviews | 60.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#45** | — |
| Size | 111 MB | 34 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | +17 |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) |

## What reviewers say

### Construction Master Pro Calc

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

**Currently charting:** #45 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


### Premix Calculator (2 Stroke)

[App page](https://appshunter.io/ios/app/premix-calculator-2-stroke/id6749201236)

Easily calculate the correct fuel-to-oil ratio for your 2-stroke engine. Input your desired mix and fuel amount to get the precise oil quantity needed, preventing engine damage and ensuring smooth operation. Includes helpful articles and guides.

**Highlights:** Calculate optimal fuel-to-oil mix ratio, Use premix chart for quick oil quantity lookup, Read informative articles on 2-stroke premixing, Eliminate guesswork in fuel mixing, Prevent engine damage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads Forever | $3.99 | one-time |


## Frequently asked questions

### Is Construction Master Pro Calc free?

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

### Is Premix Calculator (2 Stroke) free?

Premix Calculator (2 Stroke) is free to download, with in-app purchases available.

### Which has better reviews, Construction Master Pro Calc or Premix Calculator (2 Stroke)?

Construction Master Pro Calc is rated higher. Construction Master Pro Calc averages 4.8 out of 5 from 40K ratings, while Premix Calculator (2 Stroke) averages 4.3 from 11 ratings.

### Do Construction Master Pro Calc or Premix Calculator (2 Stroke) have ads?

Neither Construction Master Pro Calc nor Premix Calculator (2 Stroke) shows ads.

### Which is updated more often, Construction Master Pro Calc or Premix Calculator (2 Stroke)?

Construction Master Pro Calc ships an update every 3 weeks, and Premix Calculator (2 Stroke) every 3 months. Most recently, Construction Master Pro Calc was updated on October 21, 2026 and Premix Calculator (2 Stroke) on October 21, 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.*