# J vs METROCK公式アプリ

The clearest difference is update cadence: METROCK公式アプリ at every 2 weeks against J's every 3 months. J's advantage is review sentiment (25% vs 17%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

J ships an update every 3 months, METROCK公式アプリ every 2 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | J | METROCK公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **25.0% of reviews** | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 15 MB | 81 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [J-WAVE](https://appshunter.io/developer/379894285) | [TV Asahi Corporation](https://appshunter.io/developer/370138142) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-wave/id836381918)

Listen live to a Tokyo-based FM radio station, participate in listener communities for exclusive events and gifts, and earn points daily. Enjoy real-time song information and engage with other listeners through comments.

**Highlights:** Live radio streaming, Daily point earning, Exclusive member events, Gift and prize applications, Listener comments and communication, Real-time song display

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

**In-app purchases:** none


### METROCK公式アプリ

[App page](https://appshunter.io/ios/app/metrock/id1610228984)

This app provides essential information for the METROCK urban outdoor music festival in Tokyo and Osaka. Access artist lineups, venue maps, merchandise details, and create your personalized schedule to enhance your festival experience.

**Highlights:** Artist lineup information, Venue maps with current location, Personalized timetable creation, Festival news and ticket info, Access and FAQ details

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is METROCK公式アプリ free?

METROCK公式アプリ is free to download, with no in-app purchases.

### Do J or METROCK公式アプリ have ads?

Neither J nor METROCK公式アプリ shows ads.

### Which is updated more often, J or METROCK公式アプリ?

J ships an update every 3 months, and METROCK公式アプリ every 2 weeks. Most recently, J was updated on October 26, 2026 and METROCK公式アプリ 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.*