TC Mobile I/O vs dxLink21
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
TC Mobile I/O
Control your TC MOBILE I/O X200 SMS relay with this application. It displays device status and sends commands, eliminating the need for manual SMS writing. Access datasheets and switch between German and English languages.
- Device status indication
- Send switching commands
- Eliminates manual SMS writing
- Data sheet download
- Multilingual support (German, English)
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This app supports you in using the TC MOBILE I/O X200 SMS relay (firmware version 2.0 or later). It indicates the device status, and sends the switching commands โ the manual writing of SMS is no longer necessary. Other functions and features: - Data sheet download - Languages: German, English
dxLink21
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We innovate. Create. Together with you. A better climate. This App allows users to wirelessly connect to Belparts dynamx smart HVAC valves, used for heating and cooling applications in buildings. The user will be able to monitor the valve's activity and access data from the HVAC control process. Moreover it allows authorized users to configure the specific valve settings. There is no easier way to get your hydronic systems installed and properly commissioned than with the dynamx App! All the information you need is right there, on your smartphone or tablet. In dxLink21 App, authorized users can READS the basic settings and actual values of the valve. Additionally, they get access to advanced settings needed for commissioning of the valve. In order to receive the access, please contact your local representative for more information. ---------- Belparts is specialized in the development, production and marketing of components for the automation of HVAC systems (Heating, Ventilation, Air Conditioning) in buildings. Control valves, actuators, sensors and terminal controls are at the roots of its core competency. With the Dynamic Flow Networking concept, Belparts introduces a new method for the comfort control & energy management in buildings.
Screenshots
Verdict
The clearest difference is update cadence: dxLink21 at every 3 months against TC Mobile I/O's every 28 months. TC Mobile I/O's advantage is iOS requirement (11.0.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
TC Mobile I/O ships an update every 28 months, dxLink21 every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | TC Mobile I/O | dxLink21 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | โ |
| Update frequency | Every 28 months | Every 3 months โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | โ |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 11.0.0 โ better | 15.0 |
| Further details โ not scored | ||
| Size | 12 MB | 134 MB |
| Age rating | 4+ | 4+ |
| Developer | Phoenix Contact GmbH & Co. KG | Belparts NV |
In-app purchases
TC Mobile I/O
No in-app purchases
dxLink21
No in-app purchases









