# Addition・Subtraction Free vs 九九

The clearest difference is in-app purchases: Addition・Subtraction Free at none against 九九's 1. Addition・Subtraction Free also leads on ads (none vs shown) and iOS requirement (8.0 vs 12.0). On price, update cadence and device support there is nothing between them.

Both are free to download. 九九 sells 1 one-off in-app purchase. Addition・Subtraction Free asks for nothing beyond the download.

Addition・Subtraction Free ships an update every 4 months, 九九 every 5 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Addition・Subtraction Free | 九九 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.5 (2 ratings)](https://appshunter.io/ios/app/easy/id1611285814/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 109 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mmc Co., Ltd.](https://appshunter.io/developer/399329970) | [Sumie Watanabe](https://appshunter.io/developer/1349237972) |

## What reviewers say

### Addition・Subtraction Free

[App page](https://appshunter.io/ios/app/additionsubtraction-free/id542107877)

**Features:** macOS Compatibility

**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 Addition・Subtraction Free free?

Addition・Subtraction Free 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 Addition・Subtraction Free or 九九 have ads?

九九 shows ads; Addition・Subtraction Free does not.

### Which is updated more often, Addition・Subtraction Free or 九九?

Addition・Subtraction Free ships an update every 4 months, and 九九 every 5 months. Most recently, Addition・Subtraction Free was updated on November 1, 2026 and 九九 on November 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.*