# Arc Calculations vs Diameter Finder

The clearest difference is price: Diameter Finder at Free against Arc Calculations's $2.99. Diameter Finder also leads on update cadence (every 5 months vs every 56 months) and iOS requirement (12.1 vs 16.1). On ads, in-app purchases and device support there is nothing between them.

Diameter Finder is free to download; Arc Calculations costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arc Calculations ships an update every 56 months, Diameter Finder every 5 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Arc Calculations | Diameter Finder |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diameter-finder-circle-calc/id6463205574/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 56 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 1 MB | 13 MB |
| Requires iOS | 16.1 | **12.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383) |

## What reviewers say

### Arc Calculations

[App page](https://appshunter.io/ios/app/arc-calculations/id1491438925)

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

**In-app purchases:** none


### 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 Calculations free?

Arc Calculations costs $2.99, with no in-app purchases.

### Is Diameter Finder free?

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

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

Neither Arc Calculations nor Diameter Finder shows ads.

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

Arc Calculations ships an update every 56 months, and Diameter Finder every 5 months. Most recently, Arc Calculations was updated on November 3, 2026 and Diameter Finder 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.*