VBusTouch free vs Arrk
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VBusTouch free
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.
- Live data display
- Progression charts
- Hydraulic scheme view
- Landscape orientation chart display
- Portrait orientation data display
Read full descriptionHide full description
VBusTouch is a software especially designed for the Apple iPhone and iPod touch. It displays both live data and progression charts of the solar system at any place in the world, provided that the system is run by a RESOL controller equipped with a VBus® interface and a datalogger connected to the Internet via LAN. If the iPhone or the iPod touch are in portrait orientation, a hydraulic scheme and live data of the system are displayed. As soon as the device is turned into landscape orientation, the integrated accelerometer switches to the display of a progression chart.
Arrk
Read full descriptionHide full description
Arrk is a native iPhone app for your Radarr and Sonarr servers. Browse your library, add missing titles, choose releases and track downloads without opening a browser. • Connect directly to your servers over local Wi-Fi or a VPN such as Tailscale. No Arrk account and no cloud relay. • Server addresses and API keys stay securely in your iPhone keychain. • Automatic discovery finds Radarr and Sonarr on your network, so you do not need to look up IP addresses or ports. • See upcoming movies and episodes from every server in one calendar, grouped by date, with premieres and finales highlighted. • Browse each library as a fast poster grid or compact list, with search, sorting and filters for available, missing and monitored titles. • See artwork, cast, ratings, seasons and files together on clear, detailed pages. • Add titles using your existing quality profiles and root folders, or search releases manually and compare quality, size and seeders. • View both queues on one screen, follow progress in real time and get notified when a download finishes. Server health and free disk space are always close at hand. • Search your history of grabs, imports and failures, with the tools you need to deal with anything that gets stuck. • Make it yours with an accent colour, light or dark mode, haptics and animations. Available in English, Italian, Spanish, German and French. Arrk requires a Radarr and/or Sonarr installation that your iPhone can reach over local Wi-Fi or VPN.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | VBusTouch free | Arrk |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (4 ratings) — better | — |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 24 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 7.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 4 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | RESOL GmbH | Alessandro Mazzon |
In-app purchases
VBusTouch free
No in-app purchases
Arrk
No in-app purchases









