Comparison

VBusTouch free vs Arrk

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Live data display
  • Progression charts
  • Hydraulic scheme view
  • Landscape orientation chart display
  • Portrait orientation data display
Features
Read 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.

About

Arrk

Features
Read 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

VBusTouch free3 screens
Arrk4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
VBusTouch free versus Arrk: the parameters behind the verdict, then further details
ParameterVBusTouch freeArrk
PriceFreeFree
Rating2.0 (4 ratings) — better—
Positive reviews42.9% of reviews—
Number of ratings4 — better—
Update frequencyEvery 24 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS7.0 — better16.4
Further details — not scored
Size4 MB49 MB
Age rating4+4+
DeveloperRESOL GmbHAlessandro Mazzon

In-app purchases

None

VBusTouch free

No in-app purchases

None

Arrk

No in-app purchases

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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