# Num Fu vs Monster Addition & Subtraction

The clearest difference is review sentiment: Monster Addition & Subtraction at 72% against Num Fu's 33%. Monster Addition & Subtraction also leads on rating (4.3 vs 3.8) and ratings volume (95 vs 4). Num Fu's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

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

Monster Addition & Subtraction holds the better App Store score, 4.3 against 3.8. That said, the two scores are not equally well evidenced: Monster Addition & Subtraction has 95 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 33% of Num Fu's written reviews are positive against 72% of Monster Addition & Subtraction's.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Num Fu | Monster Addition & Subtraction |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/num-fu-addition/id981031137/reviews) | **[4.3 (95 ratings)](https://appshunter.io/ios/app/monster-addition-and-subtraction/id1438032422/reviews)** |
| Number of ratings | 4 | **95** |
| Positive reviews | 33.3% of reviews | **72.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 224 MB | 150 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ORIGO Education](https://appshunter.io/developer/693416241) | [Trevor Hansen](https://appshunter.io/developer/1371022489) |

## What reviewers say

### Num Fu

[App page](https://appshunter.io/ios/app/num-fu-addition/id981031137)

Master basic addition facts through engaging educational games. This app utilizes proven addition strategies to help students build number sense and fluency in a fun, interactive way.

**Highlights:** Addition fact practice, ORIGO Education strategies, Fun educational games, Number sense development, Mastery of math facts

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Num Fu free?

Num Fu is free to download, with no in-app purchases.

### Is Monster Addition & Subtraction free?

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

### Which has better reviews, Num Fu or Monster Addition & Subtraction?

Monster Addition & Subtraction is rated higher. Num Fu averages 3.8 out of 5 from 4 ratings, while Monster Addition & Subtraction averages 4.3 from 95 ratings.

### Do Num Fu or Monster Addition & Subtraction have ads?

Monster Addition & Subtraction shows ads; Num Fu does not.

### Which is updated more often, Num Fu or Monster Addition & Subtraction?

Num Fu ships an update every 3 months, and Monster Addition & Subtraction every 3 months. Most recently, Num Fu was updated on October 24, 2026 and Monster Addition & Subtraction on October 24, 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.*