# rotronic vs ACIN VentiFlow

The clearest difference is update cadence: rotronic at monthly against ACIN VentiFlow's every 2 months. rotronic also leads on iOS requirement (8.1 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.

rotronic ships an update monthly, ACIN VentiFlow every 2 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | rotronic | ACIN VentiFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 5 MB | 14 MB |
| Requires iOS | **8.1** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rotronic AG](https://appshunter.io/developer/1057939250) | [7Lab](https://appshunter.io/developer/868707119) |

## What reviewers say

### rotronic

[App page](https://appshunter.io/ios/app/rotronic/id1057939251)

**Features:** macOS Compatibility

**In-app purchases:** none


### ACIN VentiFlow

[App page](https://appshunter.io/ios/app/acin-ventiflow/id1577737062)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is rotronic free?

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

### Is ACIN VentiFlow free?

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

### Do rotronic or ACIN VentiFlow have ads?

Neither rotronic nor ACIN VentiFlow shows ads.

### Which is updated more often, rotronic or ACIN VentiFlow?

rotronic ships an update monthly, and ACIN VentiFlow every 2 months. Most recently, rotronic was updated on October 26, 2026 and ACIN VentiFlow on October 27, 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.*