# Arc+ vs Circle & Diameter Calculator

The clearest difference is review sentiment: Circle & Diameter Calculator at 100% against Arc+'s 50%. Circle & Diameter Calculator also leads on in-app purchases (none vs 1) and rating (5.0 vs 4.6). Arc+'s advantage is ratings volume (119 vs 1) and update cadence (every 4 months vs every 20 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Arc+ sells 1 one-off in-app purchase. Circle & Diameter Calculator asks for nothing beyond the download.

Circle & Diameter Calculator holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Arc+ has 119 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Arc+'s written reviews are positive against 100% of Circle & Diameter Calculator's.

Arc+ ships an update every 4 months, Circle & Diameter Calculator every 20 months. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Arc+ | Circle & Diameter Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (119 ratings)](https://appshunter.io/ios/app/arc-plus/id1464058503/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/circle-and-diameter-calculator/id6463205574/reviews)** |
| Number of ratings | **119** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 20 months |
| Monetization | Free | Free |
| Size | 4 MB | 10 MB |
| Requires iOS | 15.6 | **15** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Saad](https://appshunter.io/developer/1291109619) | [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383) |

## What reviewers say

### Arc+

[App page](https://appshunter.io/ios/app/arc-plus/id1464058503)

This utility app helps users calculate various dimensions of circular arcs, including radius, length, width, and height. It offers a simple interface where users input two known values to derive the rest. Additional features include a unit converter, result saving, and sharing capabilities.

**Highlights:** Calculate Radius, Length, Width, Height, Tangent, Input two known values to find others, Measurement units converter, Save results to favorites, Share calculations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Blocker | $4.99 | one-time |


### Circle & Diameter Calculator

[App page](https://appshunter.io/ios/app/circle-and-diameter-calculator/id6463205574)

Instantly calculate a circle's diameter, radius, circumference, and area. This tool is perfect for students, DIYers, and anyone needing quick, accurate circular measurements. It features an intuitive interface with automatic result updates.

**Highlights:** Calculate radius, diameter, circumference, and area, Instant calculations with automatic result updates, Input any known value to find others, Accurate geometry formulas using Pi, Support for decimal numbers and international input, Simple and intuitive interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Arc+ free?

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

### Is Circle & Diameter Calculator free?

Circle & Diameter Calculator is free to download, with no in-app purchases.

### Which has better reviews, Arc+ or Circle & Diameter Calculator?

Circle & Diameter Calculator is rated higher. Arc+ averages 4.6 out of 5 from 119 ratings, while Circle & Diameter Calculator averages 5.0 from 1 ratings.

### Do Arc+ or Circle & Diameter Calculator have ads?

Neither Arc+ nor Circle & Diameter Calculator shows ads.

### Which is updated more often, Arc+ or Circle & Diameter Calculator?

Arc+ ships an update every 4 months, and Circle & Diameter Calculator every 20 months. Most recently, Arc+ was updated on November 3, 2026 and Circle & Diameter Calculator on November 12, 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.*