# Underground Zoshock vs ISSEN 一閃

The clearest difference is in-app purchases: Underground Zoshock at none against ISSEN 一閃's 3. Underground Zoshock also leads on iOS requirement (11.0 vs 14.0). ISSEN 一閃's advantage is update cadence (every 2 days vs fortnightly). On price, ads and device support there is nothing between them.

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

Underground Zoshock ships an update fortnightly, ISSEN 一閃 every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Underground Zoshock | ISSEN 一閃 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (10 ratings)](https://appshunter.io/ios/app/underground-zoshock/id1448156105/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 50 MB | 20 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 9+ |
| Developer | [masayoshi onuki](https://appshunter.io/developer/1293979027) | [RAITO SASAGAWA](https://appshunter.io/developer/6780805981) |

## What reviewers say

### Underground Zoshock

[App page](https://appshunter.io/ios/app/underground-zoshock/id1448156105)

Engage in a strategic conquest by growing combatants and expanding your hideout. Strengthen your base with items and defend against invading heroes. The ultimate goal is world domination through rapid growth and strategic defense.

**Highlights:** Grow combatants rapidly, Increase hideout capacity, Strengthen hideout with items, Defend against heroes, Purchase hero-repelling items

**Features:** macOS Compatibility

**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 Underground Zoshock free?

Underground Zoshock 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 Underground Zoshock or ISSEN 一閃 have ads?

Both Underground Zoshock and ISSEN 一閃 show ads.

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

Underground Zoshock ships an update fortnightly, and ISSEN 一閃 every 2 days. Most recently, Underground Zoshock was updated on October 24, 2026 and ISSEN 一閃 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.*