# 吉川減災ナビ vs JoyEvent

The clearest difference is update cadence: JoyEvent at fortnightly against 吉川減災ナビ's every 22 months. 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.

吉川減災ナビ ships an update every 22 months, JoyEvent fortnightly. The most recent releases landed on October 6, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 吉川減災ナビ | JoyEvent |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Fortnightly** |
| Size | 3 MB | 45 MB |
| Requires iOS | 15.6 | **15.5.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yoshikawa City](https://appshunter.io/developer/1617764038) | [masao nakajima](https://appshunter.io/developer/1695519406) |

## What reviewers say

### 吉川減災ナビ

[App page](https://appshunter.io/ios/app/id1617764036)

**Features:** macOS Compatibility

**In-app purchases:** none


### JoyEvent

[App page](https://appshunter.io/ios/app/joyevent/id6467184505)

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

**In-app purchases:** none


## Frequently asked questions

### Is 吉川減災ナビ free?

吉川減災ナビ is free to download, with no in-app purchases.

### Is JoyEvent free?

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

### Do 吉川減災ナビ or JoyEvent have ads?

Neither 吉川減災ナビ nor JoyEvent shows ads.

### Which is updated more often, 吉川減災ナビ or JoyEvent?

吉川減災ナビ ships an update every 22 months, and JoyEvent fortnightly. Most recently, 吉川減災ナビ was updated on October 6, 2026 and JoyEvent on September 28, 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.*