# Combi Valve Sizer vs Heating Pipe Size

The clearest difference is price: Combi Valve Sizer at Free against Heating Pipe Size's $5.99. Combi Valve Sizer also leads on iOS requirement (7.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Combi Valve Sizer is free to download; Heating Pipe Size costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Combi Valve Sizer ships an update every 9 months, Heating Pipe Size every 15 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Combi Valve Sizer | Heating Pipe Size |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 15 months |
| Monetization | Free | — |
| Size | 50 MB | 1 MB |
| Requires iOS | **7.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [Sebastjan Valic](https://appshunter.io/developer/503687385) |

## What reviewers say

### Combi Valve Sizer

[App page](https://appshunter.io/ios/app/combi-valve-sizer/id504270106)

This app simplifies the selection of specific HVAC components. It guides users through choosing the correct valve and actuator, calculates flow rates, and assists with presetting and commissioning. Users can also tag components and download reports.

**Highlights:** Guided valve and actuator selection, Valve sizing and flow calculation, Valve presetting calculation, Tagging valve location and designation, Commissioning check with reports, Data sheet downloads, Report sharing

**In-app purchases:** none


### Heating Pipe Size

[App page](https://appshunter.io/ios/app/heating-pipe-size/id527730872)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Combi Valve Sizer free?

Combi Valve Sizer is free to download, with no in-app purchases.

### Is Heating Pipe Size free?

Heating Pipe Size costs $5.99, with no in-app purchases.

### Do Combi Valve Sizer or Heating Pipe Size have ads?

Neither Combi Valve Sizer nor Heating Pipe Size shows ads.

### Which is updated more often, Combi Valve Sizer or Heating Pipe Size?

Combi Valve Sizer ships an update every 9 months, and Heating Pipe Size every 15 months. Most recently, Combi Valve Sizer was updated on October 1, 2026 and Heating Pipe Size on October 12, 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.*