# JJY Simulator vs Simon Plug&Drive

The clearest difference is update cadence: Simon Plug&Drive at every 2 months against JJY Simulator's every 66 months. JJY Simulator's advantage is iOS requirement (8.0 vs 15.6). 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, Simon Plug&Drive every 2 months. The most recent releases landed on October 23, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | JJY Simulator | Simon Plug&Drive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (19 ratings)](https://appshunter.io/ios/app/jjy-simulator/id431054911/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 68.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 66 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 1 MB | 63 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NeoCat](https://appshunter.io/developer/431054914) | [Simon](https://appshunter.io/developer/531284305) |

## 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


### Simon Plug&Drive

[App page](https://appshunter.io/ios/app/simon-plug-and-drive/id1633641300)

**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 Simon Plug&Drive free?

Simon Plug&Drive is free to download, with no in-app purchases.

### Do JJY Simulator or Simon Plug&Drive have ads?

Neither JJY Simulator nor Simon Plug&Drive shows ads.

### Which is updated more often, JJY Simulator or Simon Plug&Drive?

JJY Simulator ships an update every 66 months, and Simon Plug&Drive every 2 months. Most recently, JJY Simulator was updated on October 23, 2026 and Simon Plug&Drive on October 5, 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.*