# Cool Math Games vs Echo

The clearest difference is device support: Cool Math Games at 3 against Echo's 1. Cool Math Games also leads on iOS requirement (11.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Cool Math Games sells 1 one-off in-app purchase and Echo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Cool Math Games | Echo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 68 MB | 10 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Steven Koutsouliotas](https://appshunter.io/developer/769936676) | [AprilNEA LLC](https://appshunter.io/developer/1823519141) |

## What reviewers say

### Cool Math Games

[App page](https://appshunter.io/ios/app/cool-math-games-qubd/id6443742537)

This brain teaser challenges your math and observation skills by guessing missing cube bricks in a 5-cubed volume. It's a fun, minimalist game designed to train cognitive function and sharpen your mind through increasingly difficult levels.

**Highlights:** Math skill testing, Observational skill testing, Minimalist brain teaser, Cognitive function training, Challenging levels, Suitable for all ages

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Echo

[App page](https://appshunter.io/ios/app/echo-n-back-math/id6783219758)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Pro | $4.99 | one-time |


## Frequently asked questions

### Is Cool Math Games free?

Cool Math Games is free to download, with in-app purchases available.

### Is Echo free?

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

### Do Cool Math Games or Echo have ads?

Neither Cool Math Games nor Echo 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.*