# ModbusV vs Online WHS Systems

The clearest difference is in-app purchases: Online WHS Systems at none against ModbusV's 2. Online WHS Systems also leads on update cadence (monthly vs every 17 months). ModbusV's advantage is ads (none vs shown) and iOS requirement (12.2 vs 17.0). On price and device support there is nothing between them.

Both are free to download. ModbusV sells 2 in-app purchases, starting at $0.49 per month. Online WHS Systems asks for nothing beyond the download.

ModbusV ships an update every 17 months, Online WHS Systems monthly. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ModbusV | Online WHS Systems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/modbusv/id666607476/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 108 MB | 51 MB |
| Requires iOS | **12.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chai Kunnasit](https://appshunter.io/developer/666607479) | [Global Safety Systems Pty LTD](https://appshunter.io/developer/1686022989) |

## What reviewers say

### ModbusV

[App page](https://appshunter.io/ios/app/modbusv/id666607476)

This utility tool facilitates the conversion of Modbus and DirectNet V addresses. It is designed for users who need to translate between these two industrial communication protocols.

**Highlights:** Modbus address conversion, DirectNet V address conversion, Industrial communication protocol translation, Utility tool

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - 1 Month | $0.49 | per month |
| Premium - 1 Year | $3.99 | per year |


### Online WHS Systems

[App page](https://appshunter.io/ios/app/online-whs-systems/id6448739317)

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

**In-app purchases:** none


## Frequently asked questions

### Is ModbusV free?

ModbusV is free to download, with in-app purchases available.

### Is Online WHS Systems free?

Online WHS Systems is free to download, with no in-app purchases.

### Do ModbusV or Online WHS Systems have ads?

Online WHS Systems shows ads; ModbusV does not.

### Which is updated more often, ModbusV or Online WHS Systems?

ModbusV ships an update every 17 months, and Online WHS Systems monthly. Most recently, ModbusV was updated on October 18, 2026 and Online WHS Systems on October 8, 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.*