# Combi Valve Sizer vs HyTune

The clearest difference is update cadence: HyTune at every 9 days against Combi Valve Sizer's every 9 months. Combi Valve Sizer's advantage is iOS requirement (7.0 vs 18.0). 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, HyTune every 9 days. The most recent releases landed on June 10, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | Combi Valve Sizer | HyTune |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 50 MB | 193 MB |
| Requires iOS | **7.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [IMI Hydronic Engineering International SA](https://appshunter.io/developer/508015425) |

## 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


### HyTune

[App page](https://appshunter.io/ios/app/hytune/id1053462919)

**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 HyTune free?

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

### Do Combi Valve Sizer or HyTune have ads?

Neither Combi Valve Sizer nor HyTune shows ads.

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

Combi Valve Sizer ships an update every 9 months, and HyTune every 9 days. Most recently, Combi Valve Sizer was updated on June 10, 2026 and HyTune on August 25, 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.*