# Combi Valve Sizer vs KSB FlowManager

The clearest difference is update cadence: KSB FlowManager at every 6 weeks against Combi Valve Sizer's every 9 months. Combi Valve Sizer's advantage is iOS requirement (7.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Combi Valve Sizer ships an update every 9 months, KSB FlowManager every 6 weeks. The most recent releases landed on June 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Combi Valve Sizer | KSB FlowManager |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 50 MB | 260 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [KSB SE & Co. KGaA](https://appshunter.io/developer/533763415) |

## 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


### KSB FlowManager

[App page](https://appshunter.io/ios/app/ksb-flowmanager/id1251906586)

**Features:** macOS Compatibility, 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 KSB FlowManager free?

KSB FlowManager is free to download, with no in-app purchases.

### Do Combi Valve Sizer or KSB FlowManager have ads?

Neither Combi Valve Sizer nor KSB FlowManager shows ads.

### Which is updated more often, Combi Valve Sizer or KSB FlowManager?

Combi Valve Sizer ships an update every 9 months, and KSB FlowManager every 6 weeks. Most recently, Combi Valve Sizer was updated on June 10, 2026 and KSB FlowManager on September 18, 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.*