# Robo Math Number Line Galaxy vs Subtraction

The clearest difference is price: Subtraction at Free against Robo Math Number Line Galaxy's $2.99. Subtraction also leads on iOS requirement (7.0 vs 12.0). On ads, in-app purchases and device support there is nothing between them.

Subtraction is free to download; Robo Math Number Line Galaxy costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Robo Math Number Line Galaxy | Subtraction |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/robo-math-number-line-galaxy/id959403178/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 16 MB | 99 MB |
| Requires iOS | 12.0 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [madebyeducators](https://appshunter.io/developer/668446587) | [Askunge](https://appshunter.io/developer/664878085) |

## What reviewers say

### Robo Math Number Line Galaxy

[App page](https://appshunter.io/ios/app/robo-math-number-line-galaxy/id959403178)

This app helps young learners practice fundamental math skills like addition, subtraction, and multiplication using an interactive number line. It features 15 planets to explore and an empty number line for experimentation, aligning with K1-4 and UK KS1/KS2 math curricula.

**Highlights:** 15 planets to explore, Addition and subtraction practice, Number bond exercises, Multiplication support, Empty number line for experimentation, Aligns with K1-4 and UK KS1/KS2 curriculum

**Features:** macOS Compatibility

**In-app purchases:** none


### Subtraction

[App page](https://appshunter.io/ios/app/subtraction/id1439341398)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Robo Math Number Line Galaxy free?

Robo Math Number Line Galaxy costs $2.99, with no in-app purchases.

### Is Subtraction free?

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

### Do Robo Math Number Line Galaxy or Subtraction have ads?

Neither Robo Math Number Line Galaxy nor Subtraction shows ads.

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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.*