# Ruler vs Construction Calculator A1

The clearest difference is rating: Construction Calculator A1 at 4.7 against Ruler's 3.7. Construction Calculator A1 also leads on update cadence (monthly vs every 5 months) and ratings volume (29 vs 3). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Ruler sells 1 one-off in-app purchase and Construction Calculator A1 sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Construction Calculator A1 holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Construction Calculator A1 has 29 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 63% of Ruler's written reviews are positive against 67% of Construction Calculator A1's.

Ruler ships an update every 5 months, Construction Calculator A1 monthly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Ruler | Construction Calculator A1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/ruler-scale-ruler/id919130707/reviews) | **[4.7 (29 ratings)](https://appshunter.io/ios/app/construction-calculator-a1/id1589484051/reviews)** |
| Number of ratings | 3 | **29** |
| Positive reviews | 63.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 4 MB | 182 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [mitsunori oishi](https://appshunter.io/developer/905649994) | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-scale-ruler/id919130707)

This app displays various measurement scales for length, including meters and inches. It allows users to set magnification ratios and reduced scales for different applications. Users can calibrate the ruler and adjust PPI settings for accurate measurements.

**Highlights:** Display various measurement scales, Set magnification ratios, Set reduced scales, Measure in meters and inches, Free mode for custom scales, Calibration for accuracy, PPI setting

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide Ads | $0.99 | one-time |


### Construction Calculator A1

[App page](https://appshunter.io/ios/app/construction-calculator-a1/id1589484051)

This comprehensive tool offers over 500 construction calculators, from basic material quantities to complex bills of quantities. It generates automatic drawings, manages material prices, and provides learning resources for civil engineers and contractors.

**Highlights:** 500+ construction calculators, Concrete, rebar, and steel calculations, Feet-inch calculator, Bill of Quantities (BOQ), Automatic drawings, Material price library, Unit converter

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro access monthly subscription | $2.99 | per month |
| Pro access yearly subscription | $24.99 | per year |
| 100 AI Credits | $0.99 | one-time |
| 500 AI credits | $3.99 | one-time |
| 500 AI credits | $9.99 | one-time |
| Lifetime Access | $39.99 | one-time |


## Frequently asked questions

### Is Ruler free?

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

### Is Construction Calculator A1 free?

Construction Calculator A1 is free to download, with in-app purchases available.

### Which has better reviews, Ruler or Construction Calculator A1?

Construction Calculator A1 is rated higher. Ruler averages 3.7 out of 5 from 3 ratings, while Construction Calculator A1 averages 4.7 from 29 ratings.

### Do Ruler or Construction Calculator A1 have ads?

Both Ruler and Construction Calculator A1 show ads.

### Which is updated more often, Ruler or Construction Calculator A1?

Ruler ships an update every 5 months, and Construction Calculator A1 monthly. Most recently, Ruler was updated on November 1, 2026 and Construction Calculator A1 on November 3, 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.*