# Circle Calculator vs Implicit Differentiation Cal

The clearest difference is in-app purchases: Implicit Differentiation Cal at none against Circle Calculator's 3. Implicit Differentiation Cal also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Circle Calculator's advantage is update cadence (every 3 months vs every 9 months). On price and device support there is nothing between them.

Both are free to download. Circle Calculator sells 3 in-app purchases, starting at $1.99 per 7 days. Implicit Differentiation Cal asks for nothing beyond the download.

Circle Calculator ships an update every 3 months, Implicit Differentiation Cal every 9 months. The most recent releases landed on June 21, 2026 and December 5, 2025 respectively.

## The numbers

| Metric | Circle Calculator | Implicit Differentiation Cal |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 24 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Muhammed Samil DEMIR](https://appshunter.io/developer/1600108280) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## What reviewers say

### Circle Calculator

[App page](https://appshunter.io/ios/app/circle-calculator-pi-and-area/id1607441563)

This app simplifies circle geometry calculations by instantly solving for all properties (radius, area, diameter, circumference) from a single known value. It's ideal for students, engineers, designers, and DIYers needing quick, accurate measurements.

**Highlights:** Calculate all circle properties from one input, View mathematical formulas used, Customize Pi value for precision, Clean and simple user interface, Fast and accurate results

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Annual Premium | $24.99 | per year |


### Implicit Differentiation Cal

[App page](https://appshunter.io/ios/app/implicit-differentiation-cal/id1607963477)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Circle Calculator free?

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

### Is Implicit Differentiation Cal free?

Implicit Differentiation Cal is free to download, with no in-app purchases.

### Do Circle Calculator or Implicit Differentiation Cal have ads?

Circle Calculator shows ads; Implicit Differentiation Cal does not.

### Which is updated more often, Circle Calculator or Implicit Differentiation Cal?

Circle Calculator ships an update every 3 months, and Implicit Differentiation Cal every 9 months. Most recently, Circle Calculator was updated on June 21, 2026 and Implicit Differentiation Cal on December 5, 2025.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*