Comparison

Lüftungstool vs HydroniCalc

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

Head to head
About

Lüftungstool

Features
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Diverse Berechnungstool für Lüftungskanäle und Lüftungsrohre. Eingabemöglichkeiten und Funktionen siehe Screenshots. Eingabe-/ Auswahlmöglichkeiten: • Lüftungsrohr von 80 bis 1250 mm • v von 0,5 bis 20 m/s • ϑ von 0 bis 60 °C • φ von 1 bis 100 %

About

HydroniCalc

Features
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HydroniCalc brings together 23 hydronic calculators for heating engineers and installers of water-based heating systems. Everything runs in metric units, offline, and without an account. The calculators are grouped into four families: • Basic hydraulics and pipework: power, flow and temperature difference, diameter and velocity, linear and fitting pressure losses. • Valves, balancing and circulator: the Kv / flow / pressure-drop relationship, valve sizing, balancing, and the pump operating point. • Pressurization, volumes and separation: fill pressure, water expansion, expansion vessel, and system volumes. • Radiators and underfloor heating: radiator output correction, sizing, and underfloor loop length. Each calculator shows the values to enter and displays the result as soon as the required data is valid. An info button explains the purpose of the calculation, the expected inputs, the method, the results, and the usage limits. Built-in Kv tables: look up the Kv values published by manufacturers (manufacturer, product, and generation), then copy a value to paste into your calculation. The tables never fill a calculation automatically; the value is always typed or pasted into the field. Recent calculations: your ten most recent successful calculations are stored locally, so you can find them again and resume them with their values. Eleven calculators are free to use. A single, non-subscription purchase permanently unlocks the other twelve for the Apple account used. If a purchase isn’t recognized, “Restore Purchases” asks the App Store to sync it again.

Screenshots

Lüftungstool4 screens
HydroniCalc4 screens

Verdict

The call

The clearest difference is price: HydroniCalc at Free against Lüftungstool's $2.99. Lüftungstool's advantage is in-app purchases (none vs 1) and iOS requirement (15.2 vs 17.0). On ads 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

HydroniCalc is free to download; Lüftungstool costs $2.99 up front. HydroniCalc sells 1 one-off in-app purchase. Lüftungstool asks for nothing beyond the download.

Scorecard3 real differences · 3 level
Lüftungstool versus HydroniCalc: the parameters behind the verdict, then further details
ParameterLüftungstoolHydroniCalc
Price$2.99Free — better
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.2 — better17.0
Further details — not scored
Size6 MB7 MB
Age rating4+4+
DeveloperBurak DoelekEric Chmara

In-app purchases

None

Lüftungstool

No in-app purchases

1 purchases

HydroniCalc

One-time1
  • Unlock All Calculators$12.99

Questions

Is Lüftungstool free?
Lüftungstool costs $2.99, with no in-app purchases.
Is HydroniCalc free?
HydroniCalc is free to download, with in-app purchases available.
Do Lüftungstool or HydroniCalc have ads?
Neither Lüftungstool nor HydroniCalc shows ads.

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