# Momentous Clock vs Grail

The clearest difference is update cadence: Momentous Clock at every 6 days against Grail's every 2 months. Momentous Clock also leads on iOS requirement (15.1 vs 18.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Momentous Clock against 5.0 for Grail. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Momentous Clock ships an update every 6 days, Grail every 2 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Momentous Clock | Grail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/momentous-clock/id1608715857/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/grail-clock-widget/id6751243236/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 24 MB | 5 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tutukain Software, LLC](https://appshunter.io/developer/1608715859) | [Reda Hallal](https://appshunter.io/developer/1834192474) |

## 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


### Grail

[App page](https://appshunter.io/ios/app/grail-clock-widget/id6751243236)

Customize your home screen, bedside display, and car dashboard with elegant analog and digital clock widgets. Choose from a growing collection of watch-inspired designs and personalize every detail to create a unique look.

**Highlights:** Analog and digital watch face designs, Home screen and desktop widgets, StandBy mode bedside clock, CarPlay dashboard clock, Customizable hands, bezels, and colors, Growing collection of unique models

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

**In-app purchases:** none


## Frequently asked questions

### Is Momentous Clock free?

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

### Is Grail free?

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

### Which has better reviews, Momentous Clock or Grail?

Momentous Clock and Grail are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do Momentous Clock or Grail have ads?

Neither Momentous Clock nor Grail shows ads.

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

Momentous Clock ships an update every 6 days, and Grail every 2 months. Most recently, Momentous Clock was updated on November 3, 2026 and Grail on November 8, 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.*