# Calculator° HD vs Pixel Clock

The clearest difference is in-app purchases: Calculator° HD at none against Pixel Clock's 2. Calculator° HD also leads on iOS requirement (9.0 vs 15.0). Pixel Clock's advantage is update cadence (weekly vs every 74 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Pixel Clock sells 2 one-off in-app purchases. Calculator° HD asks for nothing beyond the download.

Calculator° HD ships an update every 74 months, Pixel Clock weekly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Calculator° HD | Pixel Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calculator-hd/id590208623/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 74 months | **Weekly** |
| Monetization | Free | — |
| Size | 20 MB | 100 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [宗明 杨](https://appshunter.io/developer/854194764) | [YIMING SHI](https://appshunter.io/developer/1778404172) |

## What reviewers say

### Calculator° HD

[App page](https://appshunter.io/ios/app/calculator-hd/id590208623)

This utility app offers a user-friendly and aesthetically pleasing calculator experience specifically designed for iPads. It supports handwriting input and includes a range of scientific functions for complex calculations.

**Highlights:** Handwriting support, Scientific functions, iPad optimized design, User-friendly interface, Aesthetic design

**In-app purchases:** none


### Pixel Clock

[App page](https://appshunter.io/ios/app/pixel-clock-grid/id6737881546)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cyber City 1-day Trial | Free | one-time |
| Cyber City – Unlock Forever | $2.99 | one-time |


## Frequently asked questions

### Is Calculator° HD free?

Calculator° HD is free to download, with no in-app purchases.

### Is Pixel Clock free?

Pixel Clock is free to download, with in-app purchases available.

### Do Calculator° HD or Pixel Clock have ads?

Neither Calculator° HD nor Pixel Clock shows ads.

### Which is updated more often, Calculator° HD or Pixel Clock?

Calculator° HD ships an update every 74 months, and Pixel Clock weekly. Most recently, Calculator° HD was updated on November 1, 2026 and Pixel Clock on November 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.*