# HydroCalc Plus vs Space Tasks

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.

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.

## The numbers

| Metric | HydroCalc Plus | Space Tasks |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-plus/id578807688/reviews)** | [4.8 (13 ratings)](https://appshunter.io/ios/app/space-tasks-todo-list-game/id6755742134/reviews) |
| Number of ratings | 1 | **13** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Paid | **Free** |
| Size | 34 MB | 48 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Derainged LLC](https://appshunter.io/developer/1219716217) |

## What reviewers say

### HydroCalc Plus

[App page](https://appshunter.io/ios/app/hydrocalc-plus/id578807688)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Space Tasks

[App page](https://appshunter.io/ios/app/space-tasks-todo-list-game/id6755742134)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HydroCalc Plus free?

HydroCalc Plus costs $6.99, with no in-app purchases.

### Is Space Tasks free?

Space Tasks is free to download, with no in-app purchases.

### Which has better reviews, HydroCalc Plus or Space Tasks?

HydroCalc Plus is rated higher. HydroCalc Plus averages 5.0 out of 5 from 1 ratings, while Space Tasks averages 4.8 from 13 ratings.

### Do HydroCalc Plus or Space Tasks have ads?

Neither HydroCalc Plus nor Space Tasks shows ads.

### Which is updated more often, HydroCalc Plus or Space Tasks?

HydroCalc Plus ships an update every 3 weeks, and Space Tasks every 4 days. Most recently, HydroCalc Plus was updated on October 29, 2026 and Space Tasks on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*