# Hacker Clock vs Calcvier

The clearest difference is price: Hacker Clock at Free against Calcvier's $2.99. Hacker Clock also leads on iOS requirement (12.0 vs 15.6). Calcvier's advantage is review sentiment (81% vs 54%) and ratings volume (143 vs 42). On rating, update cadence, ads and in-app purchases there is nothing between them.

Hacker Clock is free to download; Calcvier costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.5 for Hacker Clock against 4.4 for Calcvier. Both are backed by a comparable volume of ratings — 42 and 143 respectively. Written reviews are what separate them: 54% of Hacker Clock's written reviews are positive against 81% of Calcvier's.

Hacker Clock ships an update every 15 months, Calcvier every 8 months. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Hacker Clock | Calcvier |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.5 (42 ratings)](https://appshunter.io/ios/app/hacker-clock-green-matrix/id659883519/reviews)** | [4.4 (143 ratings)](https://appshunter.io/ios/app/calcvier-keyboard-calculator/id954157490/reviews) |
| Number of ratings | 42 | **143** |
| Positive reviews | 53.8% of reviews | **81.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 8 months** |
| Monetization | Paid | **Free** |
| Size | 12 MB | 6 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Leszek Szary](https://appshunter.io/developer/464282200) | [Sergei Shpygar](https://appshunter.io/developer/866778152) |

## What reviewers say

### Hacker Clock

[App page](https://appshunter.io/ios/app/hacker-clock-green-matrix/id659883519)

Transform your device into a unique clock displaying animated hexadecimal code. Watch green hexadecimal values flow across the screen, simulating complex data processing. Ideal for computer enthusiasts, hackers, and fans of futuristic aesthetics.

**Highlights:** Animated hexadecimal code display, Three color variants (green, red, blue), Horizontal and vertical display modes, 12- and 24-hour format options, Unique clock for geeks and fans

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

**In-app purchases:** none


### Calcvier

[App page](https://appshunter.io/ios/app/calcvier-keyboard-calculator/id954157490)

Transform your device's keyboard into a powerful calculator. Perform quick calculations directly within any app without switching screens or copying and pasting results.

**Highlights:** Calculator keyboard integration, Perform calculations anywhere, No app switching required, No copy-pasting results, Use in Notes, Mail, Safari, Messages

**Features:** iMessage stickers

**In-app purchases:** none


## Frequently asked questions

### Is Hacker Clock free?

Hacker Clock is free to download, with no in-app purchases.

### Is Calcvier free?

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

### Which has better reviews, Hacker Clock or Calcvier?

Hacker Clock is rated higher. Hacker Clock averages 4.5 out of 5 from 42 ratings, while Calcvier averages 4.4 from 143 ratings.

### Do Hacker Clock or Calcvier have ads?

Neither Hacker Clock nor Calcvier shows ads.

### Which is updated more often, Hacker Clock or Calcvier?

Hacker Clock ships an update every 15 months, and Calcvier every 8 months. Most recently, Hacker Clock was updated on November 3, 2026 and Calcvier on November 6, 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.*