Comparison

x vs ViParts

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

Head to head
About

x

Control your heat pump system remotely with this app. Monitor performance, create custom scenes, and view statistics from anywhere. No extra hardware is needed to get started.

Highlights
  • Remote heat pump control
  • Comprehensive system monitoring
  • Customizable scenes
  • Statistics and overviews
  • Alarm and warning notifications
  • Dark and light mode
Features
Read full description

Die Kermi App x-center macht Ihren Alltag ein starkes Stück komfortabler und einfacher. Damit haben Sie ihr Heizsystem mit der Wärmepumpe ganz einfach und bequem im Griff. Wann immer Sie wollen und wo immer Sie gerade sind – von zu Hause oder von unterwegs. Zur Steuerung Ihrer Wärmepumpe via App ist keine zusätzliche Hardware notwendig. Einfach unter www.x-center.systems registrieren, den Onlinezugriff auf Ihre Anlage beantragen, in der App ein neues Verbindungsprofil mit Ihren Registrierungsdaten erstellen und los geht’s. Die Kermi App x-center bietet Ihnen Folgendes: • Komfortable Steuerung & umfassendes Monitoring Ihrer Wärmepumpe x-change dynamic pro sowie für alle an der Wärmepumpe angeschlossenen Komponenten - vor Ort und aus der Ferne • Erstellung von individuellen und personalisierten Szenen • Eine umfassende Statistik-Funktion • Visualisierung von Alarm- und Warnmeldungen • Verschiedenste Übersichten für Ihre Wärmepumpe - alle wichtigen Informationen auf einen Blick • Individuelle und personalisierbare Favoriten-Funktion • Dark- und Light-Mode Anleitungen zur Registrierung sowie zum Freischalten des Onlinezugriffes finden Sie unter: www.x-center.systems

About

ViParts

Access comprehensive information on spare parts and place orders directly. Identify parts using exploded drawings, barcode scanning, and compatibility checks. View technical documents and check availability and pricing.

Highlights
  • Spare part identification via exploded drawings
  • Barcode scanner for material numbers
  • Maintenance parts display
  • Product and spare part compatibility check
  • Direct spare part ordering
  • Access to technical documents
  • Availability and price display
Features
Read full description

The Viessmann ViParts app offers you as a Viessmann partner the opportunity to see all information about our spare parts and order them directly. The following functions are available in ViParts: - Identification of all spare part in exploded drawings and parts lists - Barcode scanner for reading in material numbers - Display of all maintenance parts for the products - Compatibility check between product and spare part - Ordering of spare parts - Availability of all technical documents - Display of availability and prices (with login)

Screenshots

x4 screens
ViParts4 screens

Verdict

The call

The clearest difference is review sentiment: x at 56% against ViParts's 14%. On price, update cadence, ads and in-app purchases 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

x ships an update monthly, ViParts every 3 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard1 real difference · 7 level
x versus ViParts: the parameters behind the verdict, then further details
ParameterxViParts
PriceFreeFree
Positive reviews56.3% of reviews — better14.3% of reviews
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size282 MB33 MB
Age rating4+4+
DeveloperKermi GmbHViessmann IT Service GmbH

Customer experience

x

Written reviews16 reviews
Positive56.3%
Neutral6.3%
Negative37.5%

ViParts

Written reviews14 reviews
Positive14.3%
Neutral14.3%
Negative71.4%

In-app purchases

None

x

No in-app purchases

None

ViParts

No in-app purchases

Questions

Is x free?
x is free to download, with no in-app purchases.
Is ViParts free?
ViParts is free to download, with no in-app purchases.
Do x or ViParts have ads?
Neither x nor ViParts shows ads.
Which is updated more often, x or ViParts?
x ships an update monthly, and ViParts every 3 weeks. Most recently, x was updated on November 3, 2026 and ViParts on November 8, 2026.

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