# Monad Calendar Clock vs FastMath

The clearest difference is review sentiment: FastMath at 100% against Monad Calendar Clock's 22%. Monad Calendar Clock's advantage is price ($0.99 vs $1.99) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Monad Calendar Clock costs $0.99 and FastMath $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Monad Calendar Clock | FastMath |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| 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 | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Paid | Paid |
| Size | 266 MB | 15 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Earth at the Center LLC](https://appshunter.io/developer/1437026436) | [Mathieu Bayon](https://appshunter.io/developer/1454783006) |

## What reviewers say

### 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


### FastMath

[App page](https://appshunter.io/ios/app/fastmath-quick-multiply/id6471482500)

Master two-digit multiplication with this app. It offers step-by-step explanations, engaging training, and timed challenges across five difficulty levels. Compete with friends and enjoy a fun, effective way to improve mental math skills.

**Highlights:** Step-by-step multiplication explanations, Interactive training mode, Timed math challenges, Five difficulty levels, Social leaderboards, Two-digit multiplication focus

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

**In-app purchases:** none


## Frequently asked questions

### Is Monad Calendar Clock free?

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

### Is FastMath free?

FastMath costs $1.99, with no in-app purchases.

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

Neither Monad Calendar Clock nor FastMath shows ads.

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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.*