# Quantum Validation vs Kage Japanese Shadowing

The clearest difference is in-app purchases: Quantum Validation at none against Kage Japanese Shadowing's 3. Quantum Validation also leads on iOS requirement (13.4 vs 15.0). Kage Japanese Shadowing's advantage is update cadence (fortnightly vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Kage Japanese Shadowing sells 3 in-app purchases, starting at $3.99 per month. Quantum Validation asks for nothing beyond the download.

Quantum Validation ships an update every 5 weeks, Kage Japanese Shadowing fortnightly. The most recent releases landed on September 17, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Quantum Validation | Kage Japanese Shadowing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Size | 35 MB | 36 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Apex Innovations](https://appshunter.io/developer/1669590580) | [tepgu consulting](https://appshunter.io/developer/1880013629) |

## What reviewers say

### Quantum Validation

[App page](https://appshunter.io/ios/app/quantum-validation/id6717616958)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kage Japanese Shadowing

[App page](https://appshunter.io/ios/app/kage-japanese-shadowing/id6764762161)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Quarterly | $10.99 | per 3 months |
| Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Quantum Validation free?

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

### Is Kage Japanese Shadowing free?

Kage Japanese Shadowing is free to download, with in-app purchases available.

### Do Quantum Validation or Kage Japanese Shadowing have ads?

Neither Quantum Validation nor Kage Japanese Shadowing shows ads.

### Which is updated more often, Quantum Validation or Kage Japanese Shadowing?

Quantum Validation ships an update every 5 weeks, and Kage Japanese Shadowing fortnightly. Most recently, Quantum Validation was updated on September 17, 2026 and Kage Japanese Shadowing on September 4, 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.*