# A vs Quantum Core

The clearest difference is in-app purchases: Quantum Core at none against A's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. A sells 1 one-off in-app purchase. Quantum Core asks for nothing beyond the download.

## The numbers

| Metric | A | Quantum Core |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 271 MB | 30 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ogumo Co., Ltd.](https://appshunter.io/developer/1289277557) | [Marlon Santos](https://appshunter.io/developer/1895267207) |

## What reviewers say

### A

[App page](https://appshunter.io/ios/app/a-physics-mechanics/id6670272249)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide ads | $5.99 | one-time |


### Quantum Core

[App page](https://appshunter.io/ios/app/quantum-core-inside-the-atom/id6792081823)

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

**In-app purchases:** none


## Frequently asked questions

### Is A free?

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

### Is Quantum Core free?

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

### Do A or Quantum Core have ads?

Neither A nor Quantum Core 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.*