Comparison

Heating Pipe Size vs Optima CONNECT

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

Head to head
About

Heating Pipe Size

Features
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Estimate required pipe diameter of a closed hydronic heating or cooling system in an instant and calculate pressure drop to determine required circulation pump characteristics (flow and head). Easy to use, quick and accurate results. Enter the required heating or cooling output and water flow and return temperatures. Choose pipe material. The recommended pipe diameter is already there, presented as a standard DN. Additionally, choose the recommended or a custom pipe diameter and specify pipe section length and fittings. Results include water flow rate, velocity, pressure drop and pressure drop per 100 m of straight pipe and can be used to determine the parameters of a circulation pump. ## Features: - Simple to use; - Suitable for hydronic (water-based) heating and cooling systems; - Suitable for a large range of heating and cooling outputs; - Predefined pipe materials; - Water temperature range from 1 to 99 ºC; - Completely independent from any manufacturers; - No login needed, no data connection needed; - No data collection; - No subscriptions, one-time purchase only; - Very quick calculation with no delays; ## Possible uses of the application: - Quickly estimate required pipe diameter when designing a hydronic (water-based) closed heating or cooling system. - Quickly determine circulation pump requirements (flow and head), whether it be a new system or a replacement pump. ## Notes: - It is recommended to calculate every section of the piping system separately and additionally check the whole system pressure drop. - The application is only useful for calculations of hydronic (water based) closed heating or cooling systems. Other systems and media are not supported. - Only metric units are supported. - The application, while accurate, is not meant as a complete replacement of specialized software for heating and cooling system design. The application doesn't require data connection. It doesn't require and doesn't collect any personal data. It also doesn't contain third-party ads or code. Also: no in-app purchases, no subscriptions.

About

Optima CONNECT

Features
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Optima steht für intelligente und technologisch hochwertige Produkte für das Fachhandwerk. Variable Kombinationsmöglichkeiten des haustechnischen Programms erlauben eine individuelle Gestaltung im Sanitär-, Installations-und Heizungsbereich. Die internetfähigen Geräte im Bereich Leckageschutz und Wasserbehandlung können über die kostenlose Optima App bedient werden. Das System ist vernetzt, alle Armaturen kommunizieren und interagieren. Sie können neue internetfähige Optima Geräte hinzufügen, Projekte anlegen und alles online kontrollieren und steuern inkl. Urlaubsfunktion. Mit Sicherheit alles im Blick für Ihre Hausinstallation!

Screenshots

Heating Pipe Size4 screens
Optima CONNECT3 screens

Verdict

The call

The clearest difference is price: Optima CONNECT at Free against Heating Pipe Size's $5.99. Optima CONNECT also leads on update cadence (every 4 months vs every 15 months) and iOS requirement (15.6 vs 26.0). On 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

Optima CONNECT is free to download; Heating Pipe Size costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Heating Pipe Size ships an update every 15 months, Optima CONNECT every 4 months. The most recent releases landed on October 12, 2026 and September 27, 2026 respectively.

Scorecard3 real differences · 3 level
Heating Pipe Size versus Optima CONNECT: the parameters behind the verdict, then further details
ParameterHeating Pipe SizeOptima CONNECT
Price$5.99Free — better
Update frequencyEvery 15 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.015.6 — better
Further details — not scored
Size1 MB31 MB
Age rating4+4+
DeveloperSebastjan ValicConSoft

In-app purchases

None

Heating Pipe Size

No in-app purchases

None

Optima CONNECT

No in-app purchases

Questions

Is Heating Pipe Size free?
Heating Pipe Size costs $5.99, with no in-app purchases.
Is Optima CONNECT free?
Optima CONNECT is free to download, with no in-app purchases.
Do Heating Pipe Size or Optima CONNECT have ads?
Neither Heating Pipe Size nor Optima CONNECT shows ads.
Which is updated more often, Heating Pipe Size or Optima CONNECT?
Heating Pipe Size ships an update every 15 months, and Optima CONNECT every 4 months. Most recently, Heating Pipe Size was updated on October 12, 2026 and Optima CONNECT on September 27, 2026.

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