# Quantum M vs X4

The clearest difference is update cadence: X4 at every 2 days against Quantum M's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Quantum M ships an update every 2 weeks, X4 every 2 days. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Quantum M | X4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 16 MB | 44 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Energyus Co., Ltd.](https://appshunter.io/developer/1836908735) | [Sungyong Moon](https://appshunter.io/developer/6815110178) |

## What reviewers say

### Quantum M

[App page](https://appshunter.io/ios/app/quantum-m/id6751805154)

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

**In-app purchases:** none


### X4

[App page](https://appshunter.io/ios/app/x4/id6815110176)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quantum M free?

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

### Is X4 free?

X4 is free to download, with no in-app purchases.

### Do Quantum M or X4 have ads?

Neither Quantum M nor X4 shows ads.

### Which is updated more often, Quantum M or X4?

Quantum M ships an update every 2 weeks, and X4 every 2 days. Most recently, Quantum M was updated on October 11, 2026 and X4 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.*