HydroCalc Plus vs Space Tasks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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)
Read full descriptionHide 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.
Space Tasks
Transform your to-do list into an evolving galaxy where completing tasks expands your universe. This app uses AI to break down goals into manageable steps, rewarding your progress with exploration and new discoveries.
- Task completion creates planets
- AI-powered task breakdown
- Progress visualizes as galaxy expansion
- Unlock new sectors and ranks
- Guidance from a virtual First Mate
- Gamified motivation for productivity
Read full descriptionHide full description
Space Tasks turns your to-dos into a living galaxy. You’re the captain, navigating a universe that evolves every time you get something done. A task isn’t a line on a list. It’s a planet waiting to be explored. A step isn’t a checkbox. It’s a region on the surface you travel through. Add a task --> it becomes a planet. AI breaks it down --> you get a clear mission plan with simple steps. Complete a step --> your ship moves across the world. Finish the task --> the entire system gets mapped into your galaxy. Everything you do expands your universe. You rise through the ranks, unlock sectors, and build a galaxy shaped by your own progress. Your First Mate stays with you on every mission, offering guidance and pushing you forward when you drift. If traditional to-do lists drain you, Space Tasks gives you something better: a world that reacts when you take action and rewards you with real momentum. Tasks stop feeling like chores and start feeling like exploration.
Screenshots
Verdict
The clearest difference is price: Space Tasks at Free against HydroCalc Plus's $6.99. Space Tasks also leads on update cadence (every 4 days vs every 3 weeks) and ratings volume (13 vs 1). HydroCalc Plus's advantage is rating (5.0 vs 4.8). On review sentiment, 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
Space Tasks is free to download; HydroCalc Plus costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HydroCalc Plus holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Space Tasks has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
HydroCalc Plus ships an update every 3 weeks, Space Tasks every 4 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | HydroCalc Plus | Space Tasks |
|---|---|---|
| Price | $6.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | 4.8 (13 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 13 — better |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 34 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Transparent Blue Water LLC | Derainged LLC |
Customer experience
HydroCalc Plus
Space Tasks
In-app purchases
HydroCalc Plus
No in-app purchases
Space Tasks
No in-app purchases








