# HydroCalc: Heating & Flow — Circuit projects & comparison

> Circuit projects & comparison (iPhone/iPad app by Piotr Kaminski.)

- Source: https://appshunter.io/ios/app/hydrocalc-heating-and-flow/id6801788464 (this page in markdown: same URL + `.md`)
- Developer: [Piotr Kaminski](https://appshunter.io/developer/6799375980)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, German (Germany)
- Released: 2026-08-18
- Data updated: 2026-10-25

## What is HydroCalc?

HydroCalc is a calculation aid for heating and HVAC technicians. Calculate flow from heat output and temperature difference alongside the existing hydraulic calculators.

CIRCUIT PROJECTS
Create named projects and group circuits by room, category or floor. Record heat output, temperature difference and input sources for each circuit. View total heat output and required flow together.

BASELINE AND COMPARISON
Capture a fixed baseline and edit later proposals independently. Review differences in totals and share a calculation worksheet with inputs, sources and comparison.

German and English. Local projects and calculations work offline. Existing purchase unlocks remain available.

Professional calculation aid: manufacturer data, applicable rules, system design and actual measurements take precedence. Check results against the real installation.

EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| HydroCalc Pro | $3.99 | one-time |


## Is HydroCalc safe?

Not enough ratings yet to assess HydroCalc.

## Is HydroCalc legit?

HydroCalc: Heating & Flow appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for HydroCalc is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1.0 — 2026-10-21

New grouped heating-circuit projects with sources, combined totals and a saved baseline. Compare later changes and share calculation worksheets.

### 1.0.0 — 2026-08-18

No release notes.

## Apps similar to HydroCalc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [PlumbCalc Pro](https://appshunter.io/ios/app/plumbcalc-pro/id6760953725) | — | Free | Utilities |
| [Rohrdimensionierung](https://appshunter.io/ios/app/rohrdimensionierung/id1602361102) | 5.0 (4) | $3.99 | Utilities |
| [Engineer's Unit Converter](https://appshunter.io/ios/app/engineers-unit-converter/id6758744042) | — | Free | Utilities |
| [HVAC Tools PT Chart - Gauge](https://appshunter.io/ios/app/hvac-tools-pt-chart-gauge/id6760602879) | — | Free | Utilities |
| [HydroCalc Basic](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110) | — | Free | Utilities |
| [my.wodtke](https://appshunter.io/ios/app/mywodtke/id1488459250) | — | Free | Utilities |

## More apps by Piotr Kaminski

- [BrennerCalc: Burner & HVAC](https://appshunter.io/ios/app/brennercalc-burner-and-hvac/id6801656652)
- [MAGCalc: Expansion Vessel](https://appshunter.io/ios/app/magcalc-expansion-vessel/id6801678865)
- [KeepMeter: Returns & Cost](https://appshunter.io/ios/app/keepmeter-returns-and-cost/id6803227186)
- [NavoTap](https://appshunter.io/ios/app/navotap/id6803636049)
- [Kamilunavo Trace: Nachweise](https://appshunter.io/ios/app/kamilunavo-trace-nachweise/id6803765449)

All apps by Piotr Kaminski: https://appshunter.io/developer/6799375980

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-25.*