# Momentous Clock vs Pixel Clock

The clearest difference is in-app purchases: Momentous Clock at none against Pixel Clock's 2. On price, update cadence, ads and device support there is nothing between them.

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

Momentous Clock ships an update every 6 days, Pixel Clock weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Momentous Clock | Pixel Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/momentous-clock/id1608715857/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free | — |
| Size | 24 MB | 100 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tutukain Software, LLC](https://appshunter.io/developer/1608715859) | [YIMING SHI](https://appshunter.io/developer/1778404172) |

## What reviewers say

### Momentous Clock

[App page](https://appshunter.io/ios/app/momentous-clock/id1608715857)

This app transforms your device's clock into a dynamic display of mathematical properties and number theory facts for the current time. It optionally reveals personal number connections from your contacts, all processed securely on your device.

**Highlights:** Computes mathematical properties of time, Surfaces number theory facts, Displays time on 16-segment LED screens, Finds personal number connections in contacts, On-device contact matching, Works via Catalyst on Mac

**Features:** macOS Compatibility

**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 Momentous Clock free?

Momentous Clock 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 Momentous Clock or Pixel Clock have ads?

Neither Momentous Clock nor Pixel Clock shows ads.

### Which is updated more often, Momentous Clock or Pixel Clock?

Momentous Clock ships an update every 6 days, and Pixel Clock weekly. Most recently, Momentous Clock was updated on October 24, 2026 and Pixel Clock on October 24, 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.*