# Arc+ vs Diameter Finder

The clearest difference is review sentiment: Diameter Finder at 100% against Arc+'s 50%. Diameter Finder also leads on in-app purchases (none vs 1) and rating (5.0 vs 4.6). Arc+'s advantage is ratings volume (113 vs 1). On price, update cadence, ads and monetization model there is nothing between them.

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

Diameter Finder holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Arc+ has 113 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 Diameter Finder's.

Arc+ ships an update every 4 months, Diameter Finder every 5 months. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Arc+ | Diameter Finder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (113 ratings)](https://appshunter.io/ios/app/arc-plus/id1464058503/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diameter-finder-circle-calc/id6463205574/reviews)** |
| Number of ratings | **113** | 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 5 months |
| Monetization | Free | Free |
| Size | 4 MB | 13 MB |
| Requires iOS | 15.6 | **12.1** |
| 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 |


### Diameter Finder

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

This utility app provides a straightforward way to calculate circle properties. Simply input one known value (radius, diameter, circumference, or area) to instantly get the results for the others. It's designed for quick and no-fuss calculations.

**Highlights:** Calculate radius, Calculate diameter, Calculate circumference, Calculate area, Input any single value, Quick results

**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 Diameter Finder free?

Diameter Finder is free to download, with no in-app purchases.

### Which has better reviews, Arc+ or Diameter Finder?

Diameter Finder is rated higher. Arc+ averages 4.6 out of 5 from 113 ratings, while Diameter Finder averages 5.0 from 1 ratings.

### Do Arc+ or Diameter Finder have ads?

Neither Arc+ nor Diameter Finder shows ads.

### Which is updated more often, Arc+ or Diameter Finder?

Arc+ ships an update every 4 months, and Diameter Finder every 5 months. Most recently, Arc+ was updated on September 22, 2026 and Diameter Finder on September 19, 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.*