# FastMath vs Hsia Calendar

The clearest difference is price: Hsia Calendar at Free against FastMath's $1.99. FastMath's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Hsia Calendar is free to download; FastMath costs $1.99 up front. Hsia Calendar sells 2 in-app purchases, starting at $5.99 per month. FastMath asks for nothing beyond the download.

## The numbers

| Metric | FastMath | Hsia Calendar |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | Paid | — |
| Size | 15 MB | 58 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Mathieu Bayon](https://appshunter.io/developer/1454783006) | [Laurent Bottigliengo](https://appshunter.io/developer/1233984041) |

## What reviewers say

### 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

**In-app purchases:** none


### Hsia Calendar

[App page](https://appshunter.io/ios/app/hsia-calendar/id6739701205)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| hsia One Month | $5.99 | per month |
| One Year Subscription | $59.99 | per year |


## Frequently asked questions

### Is FastMath free?

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

### Is Hsia Calendar free?

Hsia Calendar is free to download, with in-app purchases available.

### Do FastMath or Hsia Calendar have ads?

Neither FastMath nor Hsia Calendar 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.*