Comparison

HydroCalc Plus vs Nexus universal calculator

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

The COMPLETE version of HydroCalc, with what the free app doesn't have: the FITTINGS SELECTOR. Pick elbows, valves, tees and reducers piece by piece and the app computes minor losses for you — in the calculator, the inverse calculator and the system curve. No K-value tables, no transcription errors. ALL INCLUDED: pump power, system curve, pipe database and Darcy-Weisbach with real fluids come with the app. One purchase, no in-app purchases. 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 Plus Apart: Unlike basic calculators, HydroCalc Plus 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: the advanced modules are available in English and Spanish.

About

Nexus universal calculator

A smart calculator that remembers your calculations, allows you to reuse results in new formulas, and includes unit and currency conversion. It offers cloud sync for seamless access across devices and a clean design for everyday use, budgeting, and studying.

Highlights
  • Calculator with history
  • Smart formula builder
  • Unit and currency converter
  • Cloud sync across devices
  • Clean and simple design
  • Reuse past results as variables
Features
Read full description

Universal smart calculator that keeps your history, helps you create formulas, and saves you time every day. It is a powerful and easy to use calculator that remembers your calculations, lets you reuse results in new formulas, and includes a built in unit and currency converter. It is designed for everyday use, budgeting, studying, business math, and any situation where you want more than a basic calculator. KEY FEATURES 1. Calculator With History Every calculation is saved automatically. You can name your results and reuse them in new expressions. No more retyping numbers or losing your work. 2. Smart Formula Builder Use previous results like variables. Create simple or advanced expressions such as salary minus expenses or income plus tax. Perfect for planning, budgeting, and quick financial math. 3. Unit and Currency Converter Convert length, weight, temperature, volume, area, speed, and more. Get real time currency exchange rates and convert money instantly. 4. Cloud Sync Your calculations and formulas stay with you across all your devices. Simple, secure, and fast. 5. Clean and Simple Design Fast input, clear display, and an interface made for both quick math and longer calculations. TERMS OF USE: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HydroCalc Plus4 screens
Nexus universal calculator4 screens

Verdict

The call

The clearest difference is price: Nexus universal calculator at Free against HydroCalc Plus's $6.99. Nexus universal calculator also leads on update cadence (weekly vs every 3 weeks) and ratings volume (7 vs 1). HydroCalc Plus's advantage is ads (none vs shown). On rating, in-app purchases, 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

Nexus universal calculator is free to download; HydroCalc Plus costs $6.99 up front. HydroCalc Plus sells 4 one-off in-app purchases and Nexus universal calculator sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for HydroCalc Plus against 5.0 for Nexus universal calculator. That said, the two scores are not equally well evidenced: Nexus universal calculator has 7 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

HydroCalc Plus ships an update every 3 weeks, Nexus universal calculator weekly. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.

Scorecard5 real differences · 5 level
HydroCalc Plus versus Nexus universal calculator: the parameters behind the verdict, then further details
ParameterHydroCalc PlusNexus universal calculator
Price$6.99Free — better
Rating5.0 (1 ratings)5.0 (7 ratings)
Positive reviews100.0% of reviews—
Number of ratings17 — better
Update frequencyEvery 3 weeksWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.0
Further details — not scored
Size34 MB67 MB
Age rating4+4+
DeveloperTransparent Blue Water LLCNataliia Vereshchak

Customer experience

HydroCalc Plus

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Nexus universal calculator

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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
3 purchases

Nexus universal calculator

Subscriptions2
  • Premium Month$2.991 Month
  • Premium year1 Month trial$9.991 Year
One-time1
  • Lifetime Premium Features$199.00

Questions

Is HydroCalc Plus free?
HydroCalc Plus costs $6.99, and also offers in-app purchases.
Is Nexus universal calculator free?
Nexus universal calculator is free to download, with in-app purchases available.
Which has better reviews, HydroCalc Plus or Nexus universal calculator?
HydroCalc Plus and Nexus universal calculator are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.
Do HydroCalc Plus or Nexus universal calculator have ads?
Nexus universal calculator shows ads; HydroCalc Plus does not.
Which is updated more often, HydroCalc Plus or Nexus universal calculator?
HydroCalc Plus ships an update every 3 weeks, and Nexus universal calculator weekly. Most recently, HydroCalc Plus was updated on October 23, 2026 and Nexus universal calculator on October 17, 2026.

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