Crush9×9 vs Subtraction App
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Crush9×9
A quick brain training game that sharpens your mind in just 5 minutes a day. Solve multiplication problems by tapping the correct numbers to form equations. Suitable for all ages, it's a fun way to exercise your brain.
- Multiplication puzzle solving
- Quick daily brain training
- Simple tap controls
- Suitable for all ages
- Short play sessions
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九九計算を駆使して衝突を回避せよ！ １日５分で頭が良くなる爽快脳トレゲームです。 □×□＝48 Q.□に入る2つの数字はどれ？ 遊び方はとっても簡単！ 九九を成立させる2つの数字をタップするだけ。 子供から大人までお楽しみ頂けます。 毎日少しの時間でも頭の体操をしましょう！
Subtraction App
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The developer is a first-dan level player. What rank can you get? If you can reach Rank 1–3 on your first try, that’s pretty amazing. ■ Skills tested Decision-making Flexible thinking Reaction speed Adaptability Memory, and more. Both adults and kids can enjoy this. Think of it as a brain-training mini game and give it a try! ^^
Screenshots
Verdict
The clearest difference is in-app purchases: Crush9×9 at none against Subtraction App's 1. Crush9×9 also leads on iOS requirement (11.0 vs 14.0). Subtraction App's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Subtraction App sells 1 in-app purchase, starting at $1.99 per month. Crush9×9 asks for nothing beyond the download.
Crush9×9 ships an update every 6 weeks, Subtraction App every 2 weeks. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.
| Parameter | Crush9×9 | Subtraction App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 109 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | ZERONE | Foodmenu.world Inc. |
In-app purchases
Crush9×9
No in-app purchases
Subtraction App
- Premium$1.991 Month
