Comparison

HydroCalc Plus vs Habit Tracker & Capybara

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

Habit Tracker & Capybara

Build gentle routines and track progress towards your goals with a charming, stress-free habit tracker. Earn rewards for completing tasks and maintain cozy streaks with visual habit cards and home screen widgets. This app transforms self-improvement into a mindful and rewarding experience.

Highlights
  • Gentle routine building
  • Visual habit cards
  • Progress streaks
  • Personalized rewards
  • Home screen widgets
  • Built-in templates
  • Reminders
Features
Read full description

Kapy is a kawaii habit tracker that makes progress feel calm, simple, and fun. It helps users build gentle routines, keep streaks alive, and reach goals without pressure. Instead of long lists or complex charts, Kapy uses habit cards. Each card represents a goal with a set number of completions, making progress visual and motivating. Every check-in brings users closer to their next small win, no rush, just steady growth. Kapy also allows adding personal rewards for finishing a card. A small treat, a break, or something that sparks joy, every effort deserves to be celebrated. With built-in templates, reminders, and widgets, habits can be tracked directly from the home screen. Everything is designed to keep daily progress cozy, mindful, and rewarding. Why choose Kapy? Kapy transforms habit building into a soft and positive experience. It encourages consistency, turns small actions into meaningful achievements, and brings a cute, cozy atmosphere to self-improvement. Start today and see how much progress can grow! Privacy: https://me.dmansodev.com/kapy-privacy-policy Terms: https://me.dmansodev.com/kapy-terms

Screenshots

HydroCalc Plus4 screens
Habit Tracker & Capybara4 screens

Verdict

The call

The clearest difference is price: Habit Tracker & Capybara at Free against HydroCalc Plus's $6.99. Habit Tracker & Capybara also leads on update cadence (every 9 days vs every 3 weeks). HydroCalc Plus's advantage is iOS requirement (15.1 vs 18.0). On rating, review sentiment, ratings volume and ads 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

Habit Tracker & Capybara is free to download; HydroCalc Plus costs $6.99 up front. HydroCalc Plus sells 4 one-off in-app purchases and Habit Tracker & Capybara sells 3 in-app purchases, starting at $1.99 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 Habit Tracker & Capybara. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

HydroCalc Plus ships an update every 3 weeks, Habit Tracker & Capybara every 9 days. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
HydroCalc Plus versus Habit Tracker & Capybara: the parameters behind the verdict, then further details
ParameterHydroCalc PlusHabit Tracker & Capybara
Price$6.99Free — better
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.0
Further details — not scored
Size34 MB38 MB
Age rating4+4+
DeveloperTransparent Blue Water LLCDavid Manso

Customer experience

HydroCalc Plus

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

Habit Tracker & Capybara

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
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

Habit Tracker & Capybara

Subscriptions2
  • Kapy PRO Monthly$1.991 Month
  • Kapy PRO Yearly3 Days trial$6.991 Year
One-time1
  • Kapy PRO Lifetime$3.99

Questions

Is HydroCalc Plus free?
HydroCalc Plus costs $6.99, and also offers in-app purchases.
Is Habit Tracker & Capybara free?
Habit Tracker & Capybara is free to download, with in-app purchases available.
Which has better reviews, HydroCalc Plus or Habit Tracker & Capybara?
HydroCalc Plus and Habit Tracker & Capybara are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do HydroCalc Plus or Habit Tracker & Capybara have ads?
Neither HydroCalc Plus nor Habit Tracker & Capybara shows ads.
Which is updated more often, HydroCalc Plus or Habit Tracker & Capybara?
HydroCalc Plus ships an update every 3 weeks, and Habit Tracker & Capybara every 9 days. Most recently, HydroCalc Plus was updated on October 21, 2026 and Habit Tracker & Capybara on October 12, 2026.

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