# ISSEN vs ISSEN 一閃

The clearest difference is in-app purchases: ISSEN at none against ISSEN 一閃's 3. ISSEN 一閃's advantage is iOS requirement (14.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ISSEN 一閃 sells 3 one-off in-app purchases. ISSEN asks for nothing beyond the download.

ISSEN ships an update every 4 days, ISSEN 一閃 every 2 days. The most recent releases landed on September 19, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ISSEN | ISSEN 一閃 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Every 2 days** |
| Size | 166 MB | 20 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 9+ |
| Developer | [Kenji Kobayashi](https://appshunter.io/developer/535002271) | [RAITO SASAGAWA](https://appshunter.io/developer/6780805981) |

## What reviewers say

### ISSEN

[App page](https://appshunter.io/ios/app/issen-samurai-slash/id6772437281)

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

**In-app purchases:** none


### ISSEN 一閃

[App page](https://appshunter.io/ios/app/issen/id6781177113)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 銭 5,000 | $0.99 | one-time |
| 銭 30,000 | $5.99 | one-time |
| 銭 70,000 | $11.99 | one-time |


## Frequently asked questions

### Is ISSEN free?

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

### Is ISSEN 一閃 free?

ISSEN 一閃 is free to download, with in-app purchases available.

### Do ISSEN or ISSEN 一閃 have ads?

Both ISSEN and ISSEN 一閃 show ads.

### Which is updated more often, ISSEN or ISSEN 一閃?

ISSEN ships an update every 4 days, and ISSEN 一閃 every 2 days. Most recently, ISSEN was updated on September 19, 2026 and ISSEN 一閃 on September 15, 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.*