# Monad Calendar Clock vs CrystalGen

The clearest difference is update cadence: Monad Calendar Clock at every 6 weeks against CrystalGen's every 38 months. Monad Calendar Clock also leads on chart position (#177 vs unranked) and price ($0.99 vs $2.99). On ads, in-app purchases and device support there is nothing between them.

Monad Calendar Clock costs $0.99 and CrystalGen $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Monad Calendar Clock ships an update every 6 weeks, CrystalGen every 38 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Monad Calendar Clock | CrystalGen |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[3.7 (14 ratings)](https://appshunter.io/ios/app/monad-calendar-clock/id1437026437/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 38 months |
| Monetization | Paid | — |
| Best chart rank | **#177** | — |
| Size | 266 MB | 3 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Earth at the Center LLC](https://appshunter.io/developer/1437026436) | [Steve Kliewer](https://appshunter.io/developer/1255655631) |

## What reviewers say

### Monad Calendar Clock

[App page](https://appshunter.io/ios/app/monad-calendar-clock/id1437026437)

**Currently charting:** #177 Top Paid · Education (US App Store)

This app visualizes time through planetary and celestial movements, contrasting natural rhythms with mechanical time. It offers unique perspectives on Earth's position in space and time, showing star and planet locations, seasonal changes, and lunar phases.

**Highlights:** Planetary time and date display, Celestial ring visualization, Heliocentric and Geocentric modes, Star and planet location tracking, Seasonal and lunar phase progression, Twilight and sunrise/sunset times, Event scheduling

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

**In-app purchases:** none


### CrystalGen

[App page](https://appshunter.io/ios/app/crystalgen/id1589074466)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Monad Calendar Clock free?

Monad Calendar Clock costs $0.99, with no in-app purchases.

### Is CrystalGen free?

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

### Do Monad Calendar Clock or CrystalGen have ads?

Neither Monad Calendar Clock nor CrystalGen shows ads.

### Which is updated more often, Monad Calendar Clock or CrystalGen?

Monad Calendar Clock ships an update every 6 weeks, and CrystalGen every 38 months. Most recently, Monad Calendar Clock was updated on October 29, 2026 and CrystalGen on October 27, 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.*