# 九九 vs Fun multiplication with Piyo!

The clearest difference is review sentiment: Fun multiplication with Piyo! at 100% against 九九's 0%. Fun multiplication with Piyo! also leads on rating (4.7 vs 2.5) and in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 九九 sells 1 one-off in-app purchase. Fun multiplication with Piyo! asks for nothing beyond the download.

Fun multiplication with Piyo! holds the better App Store score, 4.7 against 2.5. That said, the two scores are not equally well evidenced: Fun multiplication with Piyo! has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of 九九's written reviews are positive against 100% of Fun multiplication with Piyo!'s.

九九 ships an update every 5 months, Fun multiplication with Piyo! every 8 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | 九九 | Fun multiplication with Piyo! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/easy/id1611285814/reviews) | **[4.7 (10 ratings)](https://appshunter.io/ios/app/fun-multiplication-with-piyo/id1641439148/reviews)** |
| Number of ratings | 2 | **10** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 5 months** | Every 8 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 109 MB | 148 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sumie Watanabe](https://appshunter.io/developer/1349237972) | [Rie Takayama](https://appshunter.io/developer/1636226527) |

## What reviewers say

### 九九

[App page](https://appshunter.io/ios/app/easy/id1611285814)

This app offers a comprehensive multiplication and word problem learning experience with randomized practice questions. It includes a review mode for incorrect answers and is free to use with optional ad removal via in-app purchase.

**Highlights:** Randomized multiplication problems, Word problem practice, Review mode for incorrect answers, Calendar feature, Name and icon display for submissions

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 九九アプリバナー広告非表示 | $1.99 | one-time |


### Fun multiplication with Piyo!

[App page](https://appshunter.io/ios/app/fun-multiplication-with-piyo/id1641439148)

Learn multiplication through engaging practice problems and a fun game. Earn coins for correct answers to collect items for a virtual bird companion. Enjoy mastering math skills with a friendly character.

**Highlights:** Multiplication practice problems, Multiplication game with levels, Coin rewards for correct answers, Collect bird care items, Learn with a character companion

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 九九 free?

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

### Is Fun multiplication with Piyo! free?

Fun multiplication with Piyo! is free to download, with no in-app purchases.

### Which has better reviews, 九九 or Fun multiplication with Piyo!?

Fun multiplication with Piyo! is rated higher. 九九 averages 2.5 out of 5 from 2 ratings, while Fun multiplication with Piyo! averages 4.7 from 10 ratings.

### Do 九九 or Fun multiplication with Piyo! have ads?

Both 九九 and Fun multiplication with Piyo! show ads.

### Which is updated more often, 九九 or Fun multiplication with Piyo!?

九九 ships an update every 5 months, and Fun multiplication with Piyo! every 8 months. Most recently, 九九 was updated on October 24, 2026 and Fun multiplication with Piyo! on October 24, 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.*