# Active Smart Brain Checkers vs ER3D Euler Rotations in 3D

The clearest difference is in-app purchases: ER3D Euler Rotations in 3D at none against Active Smart Brain Checkers's 3. Active Smart Brain Checkers's advantage is iOS requirement (9.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Active Smart Brain Checkers sells 3 one-off in-app purchases. ER3D Euler Rotations in 3D asks for nothing beyond the download.

## The numbers

| Metric | Active Smart Brain Checkers | ER3D Euler Rotations in 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/active-smart-brain-checkers/id1084753375/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 114 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arch Square](https://appshunter.io/developer/432278777) | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) |

## What reviewers say

### Active Smart Brain Checkers

[App page](https://appshunter.io/ios/app/active-smart-brain-checkers/id1084753375)

Test your math skills with a fast-paced puzzle game. Quickly determine if equations are correct or incorrect within a strict time limit. Progress through increasingly challenging levels across four fundamental arithmetic operations.

**Highlights:** Speed math challenges, Right/Wrong equation tapping, Time-sensitive gameplay, Progressive difficulty, Addition mode, Subtraction mode, Multiplication mode, Division mode

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pack of 250 Tokens | $0.99 | one-time |
| Pack to Unlock All Game Modes | $1.99 | one-time |
| Pack to Remove Ads | $1.99 | one-time |


### ER3D Euler Rotations in 3D

[App page](https://appshunter.io/ios/app/er3d-euler-rotations-in-3d/id6741169432)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Active Smart Brain Checkers free?

Active Smart Brain Checkers is free to download, with in-app purchases available.

### Is ER3D Euler Rotations in 3D free?

ER3D Euler Rotations in 3D is free to download, with no in-app purchases.

### Do Active Smart Brain Checkers or ER3D Euler Rotations in 3D have ads?

Neither Active Smart Brain Checkers nor ER3D Euler Rotations in 3D 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.*