# JJY Simulator vs Noahs

The clearest difference is update cadence: Noahs at monthly against JJY Simulator's every 66 months. JJY Simulator's advantage is iOS requirement (8.0 vs 12.0). 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.

JJY Simulator ships an update every 66 months, Noahs monthly. The most recent releases landed on October 18, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | JJY Simulator | Noahs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (18 ratings)](https://appshunter.io/ios/app/jjy-simulator/id431054911/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 68.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 66 months | **Monthly** |
| Monetization | Free | — |
| Size | 1 MB | 67 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [NeoCat](https://appshunter.io/developer/431054914) | [Kavin Nitasnajarukul](https://appshunter.io/developer/1469331007) |

## What reviewers say

### JJY Simulator

[App page](https://appshunter.io/ios/app/jjy-simulator/id431054911)

This utility app simulates standard radio waves used by Japanese radio-controlled clocks. It outputs a 13.3kHz audio signal to synchronize your clock, allowing you to manually set the time.

**Highlights:** Simulates JJY standard radio waves, Outputs 13.3kHz audio signal, Synchronizes radio-controlled clocks, Uses 40kHz for time adjustment, Requires earphone connection

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

**In-app purchases:** none


### Noahs

[App page](https://appshunter.io/ios/app/noahs/id1644602740)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JJY Simulator free?

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

### Is Noahs free?

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

### Do JJY Simulator or Noahs have ads?

Neither JJY Simulator nor Noahs shows ads.

### Which is updated more often, JJY Simulator or Noahs?

JJY Simulator ships an update every 66 months, and Noahs monthly. Most recently, JJY Simulator was updated on October 18, 2026 and Noahs on September 19, 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.*