# Monster Addition & Subtraction vs IPSA Mobile App

The clearest difference is rating: Monster Addition & Subtraction at 4.3 against IPSA Mobile App's 3.5. Monster Addition & Subtraction also leads on update cadence (every 3 months vs every 14 months) and ratings volume (96 vs 2). IPSA Mobile App's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Monster Addition & Subtraction sells 1 one-off in-app purchase. IPSA Mobile App asks for nothing beyond the download.

Monster Addition & Subtraction holds the better App Store score, 4.3 against 3.5. That said, the two scores are not equally well evidenced: Monster Addition & Subtraction has 96 ratings behind it against 2, so its average is the more settled of the two.

Monster Addition & Subtraction ships an update every 3 months, IPSA Mobile App every 14 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Monster Addition & Subtraction | IPSA Mobile App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (96 ratings)](https://appshunter.io/ios/app/monster-addition-and-subtraction/id1438032422/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/ipsa-mobile-app/id1536698552/reviews) |
| Number of ratings | **96** | 2 |
| Positive reviews | 72.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 14 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 150 MB | 47 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trevor Hansen](https://appshunter.io/developer/1371022489) | [WELA.ONLINE CORP.](https://appshunter.io/developer/1621972441) |

## What reviewers say

### Monster Addition & Subtraction

[App page](https://appshunter.io/ios/app/monster-addition-and-subtraction/id1438032422)

This educational game helps children learn addition and subtraction through engaging gameplay with cute monsters. It offers multiple difficulty levels and number ranges to cater to various learning stages.

**Highlights:** Addition practice, Subtraction practice, Mixed addition/subtraction, Adjustable difficulty levels, Multiple number ranges (0-100), Cute monster characters

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### IPSA Mobile App

[App page](https://appshunter.io/ios/app/ipsa-mobile-app/id1536698552)

This app provides students and parents with a convenient way to access school announcements and updates. It streamlines communication by offering organized information and replacing the need for in-person inquiries.

**Highlights:** Authentication for secure access, Public feeds for announcements, Calendar of school activities, Organized information retrieval, Replaces face-to-face inquiries

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Monster Addition & Subtraction free?

Monster Addition & Subtraction is free to download, with in-app purchases available.

### Is IPSA Mobile App free?

IPSA Mobile App is free to download, with no in-app purchases.

### Which has better reviews, Monster Addition & Subtraction or IPSA Mobile App?

Monster Addition & Subtraction is rated higher. Monster Addition & Subtraction averages 4.3 out of 5 from 96 ratings, while IPSA Mobile App averages 3.5 from 2 ratings.

### Do Monster Addition & Subtraction or IPSA Mobile App have ads?

Monster Addition & Subtraction shows ads; IPSA Mobile App does not.

### Which is updated more often, Monster Addition & Subtraction or IPSA Mobile App?

Monster Addition & Subtraction ships an update every 3 months, and IPSA Mobile App every 14 months. Most recently, Monster Addition & Subtraction was updated on November 6, 2026 and IPSA Mobile App 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.*