# A Complex Calc vs DecimalClock

The clearest difference is price: A Complex Calc at Free against DecimalClock's $2.99. A Complex Calc also leads on iOS requirement (10.0 vs 16.6). DecimalClock's advantage is update cadence (weekly vs every 3 weeks). On ads, in-app purchases and device support there is nothing between them.

A Complex Calc is free to download; DecimalClock costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A Complex Calc ships an update every 3 weeks, DecimalClock weekly. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | A Complex Calc | DecimalClock |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.7 (23 ratings)](https://appshunter.io/ios/app/a-complex-calc/id1372571548/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 28 MB | 2 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Ruffolo](https://appshunter.io/developer/1372571547) | [Kaspars Sops](https://appshunter.io/developer/1847143376) |

## What reviewers say

### A Complex Calc

[App page](https://appshunter.io/ios/app/a-complex-calc/id1372571548)

Perform complex calculations with a modern, user-friendly interface. Offers both basic and scientific modes, including support for complex numbers and advanced functions. This lightweight application provides a history of computations and is completely free with no advertisements.

**Highlights:** Complex number support, Basic and Scientific modes, History of operations, Trigonometric and hyperbolic functions, Random number generation, Lightweight app size

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

**In-app purchases:** none


### DecimalClock

[App page](https://appshunter.io/ios/app/decimalclock/id6754224922)

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

**In-app purchases:** none


## Frequently asked questions

### Is A Complex Calc free?

A Complex Calc is free to download, with no in-app purchases.

### Is DecimalClock free?

DecimalClock costs $2.99, with no in-app purchases.

### Do A Complex Calc or DecimalClock have ads?

Neither A Complex Calc nor DecimalClock shows ads.

### Which is updated more often, A Complex Calc or DecimalClock?

A Complex Calc ships an update every 3 weeks, and DecimalClock weekly. Most recently, A Complex Calc was updated on September 29, 2026 and DecimalClock on October 4, 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.*