Comparison

HydroCalc Plus vs SHK Toolbox von LFDEV

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

Head to head
About

HydroCalc Plus

A professional tool for hydraulic engineers to calculate pressure losses in piping systems. It supports US and SI units, offers an extensive pipe material and fittings database, and includes inverse calculations for design optimization.

Highlights
  • Friction head loss calculation (Hazen-Williams)
  • US and SI unit support
  • Extensive pipe material library
  • Fittings and valves database
  • Inverse calculation mode
  • Real-time results (velocity, losses)
Features
Read full description

Professional hydraulic engineering tool for calculating pressure losses in piping systems. Essential for engineers, plumbers, and contractors designing water distribution networks. Key Features: Calculate friction head losses using industry-standard Hazen-Williams equation Support for both US (ft, gpm, psi) and SI (m, lps, bar) units Extensive pipe material library with pre-defined roughness coefficients (C-factors) Complete fittings and valves database including elbows, tees, valves, contractions, and expansions Inverse calculations to determine optimal pipe diameter, flow rate, or length for target head loss Real-time results showing velocity, friction loss, minor losses, and total system head loss What Sets Pro Apart: Unlike basic calculators, HydroCalc Pro accounts for both major losses (pipe friction) and minor losses (fittings and valves). The app includes a comprehensive database of K-factors for various components, allowing accurate total system pressure loss calculations. Perfect For: Water supply system design Irrigation network planning HVAC piping calculations Fire protection systems Industrial fluid transport Educational purposes in hydraulic engineering Technical Capabilities: The app considers all critical factors affecting pressure loss: flow velocity, pipe diameter, internal roughness, pipe length, and fitting configurations. Materials include PVC, polyethylene, steel, cast iron, concrete, and more with accurate C-factors ranging from 120-150. Inverse Calculation Mode: Unique feature allowing backward calculations - determine required pipe size for allowable head loss, maximum flow capacity, or optimal pipe length for your system constraints. Simple, intuitive interface with instant results. No internet connection required. Professional-grade calculations in your pocket. Note: Premium modules are available in English and Spanish.

About

SHK Toolbox von LFDEV

Features
Read full description

Die SHK Toolbox von LFDEV unterstützt Monteure, Gesellen und Auszubildende im Bereich Heizung, Sanitär und Lüftung bei den täglichen Aufgaben auf der Baustelle. Sie bietet eine übersichtliche Sammlung an Werkzeugen, Rechnern und Fachinformationen, die den Arbeitsalltag spürbar erleichtern. Funktionen • Rohrberechnung für Heizung, Sanitär und Lüftung • Mischtemperatur-Rechner für Heiz- und Warmwassersysteme • Dimensionierungs- und Auslegungshelfer • Abfluss- und Volumenstromberechnungen • Schneller Zugriff auf Tabellen, Normwerte und wichtige Kennzahlen • Übersichtliche Bedienoberfläche für schnelle Ergebnisse im Arbeitsalltag • Werkzeuge speziell für die Praxis entwickelt und optimiert Für wen ist die App geeignet? • Auszubildende im SHK-Handwerk • Installateure, Gesellen und Obermonteure • Kundendiensttechniker • Meister, Techniker und Planer • Alle, die regelmäßig im Bereich Heizung, Sanitär oder Lüftung arbeiten Ziel der App Der SHK APP soll Fachkräften auf der Baustelle und im Kundendienst schnelle und zuverlässige Unterstützung bieten. Die App fasst häufig benötigte Berechnungen und Informationen an einem Ort zusammen, damit Arbeiten effizienter und sicherer durchgeführt werden können. Entwicklung Die App wurde von einem erfahrenen Obermonteur entwickelt, der den Bedarf nach einem kompakten, praxisorientierten Werkzeug erkannt hat. Rückmeldungen aus dem Alltag fließen fortlaufend in Verbesserungen und neue Funktionen ein aber auch von deinem Feedback wird die App stetig verbessert.

Screenshots

HydroCalc Plus4 screens
SHK Toolbox von LFDEV4 screens

Verdict

The call

The clearest difference is in-app purchases: SHK Toolbox von LFDEV at none against HydroCalc Plus's 4. SHK Toolbox von LFDEV also leads on price ($1.99 vs $3.99). HydroCalc Plus's advantage is update cadence (every 3 weeks vs every 3 months). On ads, device support and iOS requirement 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

HydroCalc Plus costs $3.99 and SHK Toolbox von LFDEV $1.99 up front. HydroCalc Plus sells 4 one-off in-app purchases. SHK Toolbox von LFDEV asks for nothing beyond the download.

UpkeepUpdate frequency

HydroCalc Plus ships an update every 3 weeks, SHK Toolbox von LFDEV every 3 months. The most recent releases landed on August 31, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
HydroCalc Plus versus SHK Toolbox von LFDEV: the parameters behind the verdict, then further details
ParameterHydroCalc PlusSHK Toolbox von LFDEV
Price$3.99$1.99 — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size34 MB28 MB
Age rating4+4+
DeveloperTransparent Blue Water LLCLukas Fink

In-app purchases

4 purchases

HydroCalc Plus

One-time4
  • Pump Power Calculator$1.99
  • System Curve Generator$1.99
  • Pipe Database$1.99
Show 1 more
  • Industrial Fluids Pack$2.99
None

SHK Toolbox von LFDEV

No in-app purchases

Questions

Is HydroCalc Plus free?
HydroCalc Plus costs $3.99, and also offers in-app purchases.
Is SHK Toolbox von LFDEV free?
SHK Toolbox von LFDEV costs $1.99, with no in-app purchases.
Do HydroCalc Plus or SHK Toolbox von LFDEV have ads?
Neither HydroCalc Plus nor SHK Toolbox von LFDEV shows ads.
Which is updated more often, HydroCalc Plus or SHK Toolbox von LFDEV?
HydroCalc Plus ships an update every 3 weeks, and SHK Toolbox von LFDEV every 3 months. Most recently, HydroCalc Plus was updated on August 31, 2026 and SHK Toolbox von LFDEV on September 22, 2026.

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