Comparison

Oventrop vs SmartKap

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

Head to head
About

Oventrop

This app assists with the design, calculation, and documentation of hydronic balancing for heating systems. It supports various standards and regulations, enabling users to calculate valve presets, heating loads, and radiator sizes. Documentation can be generated in PDF format or printed wirelessly.

Highlights
  • Project design with calculations (VdZ, BEG)
  • Heating check according to EnSimiMaV and DIN SPEC 15378
  • OV-DMC 3 measuring system integration
  • Simplified heating load calculation (DIN 12831)
  • DIN radiator and thermostatic valve sizing
  • ErP energy efficiency label creation
  • PDF documentation and wireless printing
Features
Read full description

Functions: • Project design incl. calculations for procedure A or B (VdZ, BEG) • Heating check according to EnSimiMaV und DIN SPEC 15378:2018-08 • OV-DMC 3 measuring system for adjustment/control measurement in heating and cooling systems • With valve identification for the new double regulating valves HydroControl and HydroCom • Simplified heating load calculation according to DIN 12831 • DIN radiator sizing (existing or new) • Sizing of thermostatic valves • Sizing of double regulating valves • Creation of ErP energy efficiency label • Unit converter • Oventrop News • Oventrop Contact Oventrop GmbH & Co. KG offers an app to support the execution and documentation of the hydronic balancing of heating systems. Whether on the construction site, at a consultation appointment or in the office, users of the OVapp can calculate the preset values of the Oventrop thermostatic valves and regulating and pipeline valves at any time with their smartphone or tablet and thus easily carry out the hydronic balancing of heating systems. In addition, a simplified heating load calculation according to DIN EN 12831-B3 or a radiator sizing with DIN radiators is integrated. The OVapp can be used to fulfil the requirements of procedure A and B of the VdZ form (individual measure) for hydronic balancing within the framework of the Federal Funding for efficient buildings (BEG) for existing buildings - procedure B is possible when using the Q-Tech thermostatic valves with flow control. The calculations can be documented using a PDF file or WLAN printer. The VdZ form is filled out automatically according to the designs. Furthermore, the OV-DMC 3 measuring system for the adjustment and control of heating and cooling systems is integrated. Pressure measurements can be carried out easily with the OVapp and the measuring sensor, flow values can be determined and presettings for the desired volume flows can be determined. With the ErP wizard there is the possibility to create ErP energy efficiency labels as composite labels for Oventrop products in the field of solar thermal energy. Furthermore, an extensive manufacturer product database of the VdZ with ErP-relevant products can be accessed.

About

SmartKap

Read full description

The SmartKap app allows the user to review measurements of airflow, temperature, humidity, atmospheric pressure and differential pressure in real-time via a compatible mobile device. This data is transmitted via Bluetooth® 4.2 low consumption to connected devices within a range up to 30 meters (98 ft). SmartKap also allows the user to save logged measurements over time so that technicians can create detailed reports that can be sent via email directly to clients. SmartKap also includes a database of different air vent varieties to help gather data from all types of installations.

Screenshots

Oventrop4 screens
SmartKap4 screens

Verdict

The call

The clearest difference is update cadence: Oventrop at monthly against SmartKap's every 7 months. SmartKap's advantage is iOS requirement (12.4 vs 15.6). 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

Oventrop ships an update monthly, SmartKap every 7 months. Both last shipped on September 29, 2026.

Scorecard2 real differences · 8 level
Oventrop versus SmartKap: the parameters behind the verdict, then further details
ParameterOventropSmartKap
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews44.4% of reviews—
Number of ratings1 — better—
Update frequencyMonthly — betterEvery 7 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.4 — better
Further details — not scored
Size48 MB60 MB
Age rating4+4+
DeveloperOventrop GmbH & Co. KGSAUERMANN INDUSTRIE

In-app purchases

None

Oventrop

No in-app purchases

None

SmartKap

No in-app purchases

Questions

Is Oventrop free?
Oventrop is free to download, with no in-app purchases.
Is SmartKap free?
SmartKap is free to download, with no in-app purchases.
Do Oventrop or SmartKap have ads?
Neither Oventrop nor SmartKap shows ads.
Which is updated more often, Oventrop or SmartKap?
Oventrop ships an update monthly, and SmartKap every 7 months. Most recently, Oventrop was updated on September 29, 2026 and SmartKap on September 29, 2026.

Other comparisons