# iPSマスター vs Monster Tower

The clearest difference is in-app purchases: iPSマスター at none against Monster Tower's 10. iPSマスター also leads on iOS requirement (8.0 vs 12.0). Monster Tower's advantage is update cadence (monthly vs every 4 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Monster Tower sells 10 one-off in-app purchases. iPSマスター asks for nothing beyond the download.

iPSマスター ships an update every 4 months, Monster Tower monthly. The most recent releases landed on September 5, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | iPSマスター | Monster Tower |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 684 MB | 77 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KYOTO UNIVERSITY](https://appshunter.io/developer/736070990) | [Wasabi Applications](https://appshunter.io/developer/643579130) |

## What reviewers say

### iPSマスター

[App page](https://appshunter.io/ios/app/ips/id1073322395)

**Features:** macOS Compatibility

**In-app purchases:** none


### Monster Tower

[App page](https://appshunter.io/ios/app/monster-tower-math-battle-rpg/id1397277478)

An RPG-style game where children improve math skills by solving problems to win battles. Progress through a tower, defeat monsters, collect coins, and find treasures. Covers elementary school math concepts.

**Highlights:** Solve math problems to win battles, Collect coins for weapon upgrades, Find rare treasures, Boss battles and hidden stages, Practice addition, subtraction, multiplication, division

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| お宝ドロップ率 ２倍 | $0.99 | one-time |
| All Stages | $0.99 | one-time |
| Time Limit x2 | $0.99 | one-time |
| Attack Power x2 | $0.99 | one-time |
| Treasure Drop Rate x2 | $0.99 | one-time |
| Earned Coins x2 | $0.99 | one-time |
| かくとくコイン ５倍 | $3.99 | one-time |
| お宝ドロップ率 ５倍 | $3.99 | one-time |
| Earned Coins x5 | $3.99 | one-time |
| Treasure Drop Rate x5 | $3.99 | one-time |


## Frequently asked questions

### Is iPSマスター free?

iPSマスター is free to download, with no in-app purchases.

### Is Monster Tower free?

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

### Do iPSマスター or Monster Tower have ads?

Neither iPSマスター nor Monster Tower shows ads.

### Which is updated more often, iPSマスター or Monster Tower?

iPSマスター ships an update every 4 months, and Monster Tower monthly. Most recently, iPSマスター was updated on September 5, 2026 and Monster Tower on September 23, 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.*