# Stack Testers Flow Friend vs Kärcher Machine connect

The clearest difference is review sentiment: Kärcher Machine connect at 100% against Stack Testers Flow Friend's 0%. Kärcher Machine connect also leads on update cadence (every 5 weeks vs every 8 months). Stack Testers Flow Friend's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Stack Testers Flow Friend ships an update every 8 months, Kärcher Machine connect every 5 weeks. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Stack Testers Flow Friend | Kärcher Machine connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/karcher-machine-connect/id1631119612/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 32 MB | 102 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lewis Holmes](https://appshunter.io/developer/1454834389) | [Alfred Kaercher SE & Co. KG](https://appshunter.io/developer/661626347) |

## What reviewers say

### Stack Testers Flow Friend

[App page](https://appshunter.io/ios/app/stack-testers-flow-friend/id1454834655)

This mobile toolkit assists environmental engineers with on-site calculations for stack testing. Quickly determine velocity and volume flow by inputting stack size and gas conditions, eliminating the need for manual calculations or laptops. It also aids in calculating differential pressure cell mA output for data logging.

**Highlights:** Velocity and volume flow calculations, Input stack size and gas conditions, Differential pressure cell mA output calculation, Preloaded Engineers Note Book content, On-site calculation tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Kärcher Machine connect

[App page](https://appshunter.io/ios/app/karcher-machine-connect/id1631119612)

Enhance your floor cleaning experience with smart control over your scrubber drier. Adjust settings, manage permissions, and access helpful advice for optimal performance.

**Highlights:** Machine display language settings, Cleaning head type selection, Adjustable transport speed, USB port control, Brush and suction delay timing, Speed-dependent water dosage, Intelligent Key permission management

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stack Testers Flow Friend free?

Stack Testers Flow Friend is free to download, with no in-app purchases.

### Is Kärcher Machine connect free?

Kärcher Machine connect is free to download, with no in-app purchases.

### Do Stack Testers Flow Friend or Kärcher Machine connect have ads?

Neither Stack Testers Flow Friend nor Kärcher Machine connect shows ads.

### Which is updated more often, Stack Testers Flow Friend or Kärcher Machine connect?

Stack Testers Flow Friend ships an update every 8 months, and Kärcher Machine connect every 5 weeks. Most recently, Stack Testers Flow Friend was updated on October 5, 2026 and Kärcher Machine connect on October 1, 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.*