# MAGCalc Expansion — Expansion vessel sizing

> Expansion vessel sizing (iPhone/iPad app by Piotr Kaminski.)

- Source: https://appshunter.io/ios/app/magcalc-expansion/id6801678865 (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: 2026-08-22
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/magcalc-expansion/id6801678865/reviews.md

## What is MAGCalc Expansion?

MAGCalc is a compact calculation aid for heating, HVAC and service technicians.

Features:
- Size heating expansion vessels for water-based systems
- Estimate water expansion from system volume and temperature
- Convert static height into pressure
- Calculate suggested pre-charge and fill pressure
- Show the next common vessel size
- German and English
- Works offline

MAGCalc Pro permanently unlocks manual expansion sizing for glycol, solar fluids and special media with a one-time In-App Purchase.

Important:
MAGCalc is a calculation aid for trained professionals. Manufacturer data, applicable standards, safety components, system design and actual measurements always take precedence.

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 |
| --- | --- | --- |
| MAGCalc Pro | $3.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-08-22

No release notes.

## More apps by Piotr Kaminski

- [BrennerCalc](https://appshunter.io/ios/app/brennercalc/id6801656652)
- [HydroCalc SHK](https://appshunter.io/ios/app/hydrocalc-shk/id6801788464)
- [KeepMeter](https://appshunter.io/ios/app/keepmeter/id6803227186)
- [NavoTap](https://appshunter.io/ios/app/navotap/id6803636049)
- [Kamilunavo Trace](https://appshunter.io/ios/app/kamilunavo-trace/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 2026-08-31.*