# Solar System Scope vs Monad Calendar Clock

The clearest difference is review sentiment: Solar System Scope at 76% against Monad Calendar Clock's 22%. Solar System Scope also leads on price (Free vs $0.99) and rating (4.4 vs 3.7). Monad Calendar Clock's advantage is in-app purchases (none vs 1) and update cadence (every 6 weeks vs every 4 months). On ads, device support and iOS requirement there is nothing between them.

Solar System Scope is free to download; Monad Calendar Clock costs $0.99 up front. Solar System Scope sells 1 one-off in-app purchase. Monad Calendar Clock asks for nothing beyond the download.

Solar System Scope holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: Solar System Scope has 882 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 76% of Solar System Scope's written reviews are positive against 22% of Monad Calendar Clock's.

Solar System Scope ships an update every 4 months, Monad Calendar Clock every 6 weeks. The most recent releases landed on September 22, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Solar System Scope | Monad Calendar Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.4 (882 ratings)](https://appshunter.io/ios/app/solar-system-scope/id863969175/reviews)** | [3.7 (14 ratings)](https://appshunter.io/ios/app/monad-calendar-clock/id1437026437/reviews) |
| Number of ratings | **882** | 14 |
| Positive reviews | **76.4% of reviews** | 22.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 154 MB | 266 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [INOVE, s.r.o.](https://appshunter.io/developer/863969178) | [Earth at the Center LLC](https://appshunter.io/developer/1437026436) |

## What reviewers say

### Solar System Scope

[App page](https://appshunter.io/ios/app/solar-system-scope/id863969175)

Explore and discover the solar system and outer space with realistic 3D visualizations and detailed celestial simulations. This app offers an educational and engaging experience for all ages, featuring a comprehensive encyclopedia and a night sky observatory.

**Highlights:** 3D Encyclopedia of celestial bodies, Realistic 3D visualizations, Night sky observatory with time simulation, Accurate orbital parameter calculations, High-quality planetary and moon maps, Multilingual support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HQ Textures / No Ads | $5.99 | one-time |

**What reviewers like**

- 🚀 Amazing app
- 👍 Great for learning about space
- 🌟 Beautifully created
- 🔭 Realistic and detailed
- 🎓 Excellent for education

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔀 Orientation issues
- 🔒 Upgrade required for full functionality
- 🕰️ Difficulty pinpointing specific dates

**Reported bugs**

- Crashes when dragging Jupiter
- Upside-down orientation on tablets
- Unable to restore purchases
- Freezes and crashes on launch

**Requested features**

- Add more celestial bodies (Messier objects, Planet 9/10, black holes, etc.)
- Enable exploration of other galaxies and deep space objects
- Improve telescope/zoom functionality
- Add more moons and irregular satellites
- Implement continental drift and solar system evolution


### Monad Calendar Clock

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

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


## Frequently asked questions

### Is Solar System Scope free?

Solar System Scope is free to download, with in-app purchases available.

### Is Monad Calendar Clock free?

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

### Which has better reviews, Solar System Scope or Monad Calendar Clock?

Solar System Scope is rated higher. Solar System Scope averages 4.4 out of 5 from 882 ratings, while Monad Calendar Clock averages 3.7 from 14 ratings.

### Do Solar System Scope or Monad Calendar Clock have ads?

Neither Solar System Scope nor Monad Calendar Clock shows ads.

### Which is updated more often, Solar System Scope or Monad Calendar Clock?

Solar System Scope ships an update every 4 months, and Monad Calendar Clock every 6 weeks. Most recently, Solar System Scope was updated on September 22, 2026 and Monad Calendar Clock on September 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.*