adz vs HydroCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
adz
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Die adz App ist Dein digitaler Assistent für den Projektalltag. Mit dem Netzrechner Lüftung kannst Du Lüftungsnetze dimensionieren und in Sekundenschnelle zwischen verschiedenen Abmessungen variieren. Sowohl die Berechnung von Kanalnetzen als auch von Rohrnetzen sind in der App integriert. Die App wird durch die Firma adz laufend weiterentwickelt. Anregungen, Anmerkungen oder Entwicklungswünsche nehmen wir im Review gerne entgegen.
HydroCalc
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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/
Screenshots
Verdict
The clearest difference is in-app purchases: adz at none against HydroCalc's 1. adz also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads 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
Both are free to download. HydroCalc sells 1 one-off in-app purchase. adz asks for nothing beyond the download.
adz ships an update every 4 months, HydroCalc every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | adz | HydroCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 20 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | arcade solutions ag | Piotr Kaminski |
In-app purchases
adz
No in-app purchases
HydroCalc
- HydroCalc Pro$3.99
