# VBusTouch free vs Arrk

The clearest difference is update cadence: Arrk at every 3 days against VBusTouch free's every 24 months. VBusTouch free's advantage is iOS requirement (7.0 vs 16.4). 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.

VBusTouch free ships an update every 24 months, Arrk every 3 days. The most recent releases landed on September 19, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | VBusTouch free | Arrk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/vbustouch-free/id325152686/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 4 MB | 49 MB |
| Requires iOS | **7.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RESOL GmbH](https://appshunter.io/developer/369420321) | [Alessandro Mazzon](https://appshunter.io/developer/6800514553) |

## What reviewers say

### VBusTouch free

[App page](https://appshunter.io/ios/app/vbustouch-free/id325152686)

Monitor and visualize solar system data and progression charts from anywhere in the world. Requires a RESOL controller with a VBus interface and a datalogger connected to the internet.

**Highlights:** Live data display, Progression charts, Hydraulic scheme view, Landscape orientation chart display, Portrait orientation data display

**Features:** macOS Compatibility

**In-app purchases:** none


### Arrk

[App page](https://appshunter.io/ios/app/arrk/id6800514551)

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

**In-app purchases:** none


## Frequently asked questions

### Is VBusTouch free free?

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

### Is Arrk free?

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

### Do VBusTouch free or Arrk have ads?

Neither VBusTouch free nor Arrk shows ads.

### Which is updated more often, VBusTouch free or Arrk?

VBusTouch free ships an update every 24 months, and Arrk every 3 days. Most recently, VBusTouch free was updated on September 19, 2026 and Arrk on September 30, 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.*