# ComplyFlow Live Access vs Stack Testers Friend

The clearest difference is update cadence: ComplyFlow Live Access at every 2 months against Stack Testers Friend's every 7 months. 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.

ComplyFlow Live Access ships an update every 2 months, Stack Testers Friend every 7 months. The most recent releases landed on September 10, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | ComplyFlow Live Access | Stack Testers Friend |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | — | Free |
| Size | 61 MB | 33 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Comply Flow Pty Ltd](https://appshunter.io/developer/1104865074) | [Lewis Holmes](https://appshunter.io/developer/1454834389) |

## What reviewers say

### ComplyFlow Live Access

[App page](https://appshunter.io/ios/app/complyflow-live-access/id1399388984)

**In-app purchases:** none


### Stack Testers Friend

[App page](https://appshunter.io/ios/app/stack-testers-friend/id1454834390)

This mobile toolkit provides essential on-site calculations for stack testers. Quickly perform gas conversions, probe position calculations, and other vital engineering tasks without needing a laptop. It's designed for environmental engineers needing immediate access to data while working in the field.

**Highlights:** Gas conversion calculations, Isokinetic sample position calculations, Extraction rate calculations, Gas density calculations, Particulate matter normalization, Calibration function calculations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ComplyFlow Live Access free?

ComplyFlow Live Access is free to download, with no in-app purchases.

### Is Stack Testers Friend free?

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

### Do ComplyFlow Live Access or Stack Testers Friend have ads?

Neither ComplyFlow Live Access nor Stack Testers Friend shows ads.

### Which is updated more often, ComplyFlow Live Access or Stack Testers Friend?

ComplyFlow Live Access ships an update every 2 months, and Stack Testers Friend every 7 months. Most recently, ComplyFlow Live Access was updated on September 10, 2026 and Stack Testers Friend on July 7, 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.*