# Gridizen vs Quantum Quack

The clearest difference is update cadence: Quantum Quack at every 2 days against Gridizen's fortnightly. 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.

Gridizen ships an update fortnightly, Quantum Quack every 2 days. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Gridizen | Quantum Quack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 65 MB | 1 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gridizen](https://appshunter.io/developer/1450276560) | [Morgan Facchin](https://appshunter.io/developer/1762455635) |

## What reviewers say

### Gridizen

[App page](https://appshunter.io/ios/app/gridizen/id1488916712)

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

**In-app purchases:** none


### Quantum Quack

[App page](https://appshunter.io/ios/app/quantum-quack/id6630387948)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gridizen free?

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

### Is Quantum Quack free?

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

### Do Gridizen or Quantum Quack have ads?

Neither Gridizen nor Quantum Quack shows ads.

### Which is updated more often, Gridizen or Quantum Quack?

Gridizen ships an update fortnightly, and Quantum Quack every 2 days. Most recently, Gridizen was updated on September 27, 2026 and Quantum Quack on September 29, 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.*