# Add Up 10. vs 九九

The clearest difference is in-app purchases: Add Up 10. at none against 九九's 1. 九九's advantage is iOS requirement (12.0 vs 15.0). 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. Add Up 10. asks for nothing beyond the download.

Add Up 10. ships an update every 3 months, 九九 every 5 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Add Up 10. | 九九 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/easy/id1611285814/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 58 MB | 109 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [Sumie Watanabe](https://appshunter.io/developer/1349237972) |

## What reviewers say

### Add Up 10.

[App page](https://appshunter.io/ios/app/add-up-10/id562494612)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Add Up 10. free?

Add Up 10. is free to download, with no in-app purchases.

### Is 九九 free?

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

### Do Add Up 10. or 九九 have ads?

Both Add Up 10. and 九九 show ads.

### Which is updated more often, Add Up 10. or 九九?

Add Up 10. ships an update every 3 months, and 九九 every 5 months. Most recently, Add Up 10. was updated on October 5, 2026 and 九九 on October 3, 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.*