# iSystem vs PLC Signal Explorer

The clearest difference is device support: PLC Signal Explorer at 2 against iSystem's —. iSystem's advantage is iOS requirement (14.0 vs 16.6). On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | iSystem | PLC Signal Explorer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Size | 2 MB | 8 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | — | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Zack Smith](https://appshunter.io/developer/388860537) | [Yagoub Dagriri](https://appshunter.io/developer/1823377277) |

## What reviewers say

### iSystem

[App page](https://appshunter.io/ios/app/isystem/id454947443)

**In-app purchases:** none


### PLC Signal Explorer

[App page](https://appshunter.io/ios/app/plc-signal-explorer/id6759815466)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSystem free?

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

### Is PLC Signal Explorer free?

PLC Signal Explorer is free to download, with no in-app purchases.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*