# Stack Testers Flow Friend vs TalkType

The clearest difference is ads: Stack Testers Flow Friend at none against TalkType's shown. Stack Testers Flow Friend also leads on update cadence (every 8 months vs every 35 months) and iOS requirement (13.0 vs 15.0). On price, 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.

Stack Testers Flow Friend ships an update every 8 months, TalkType every 35 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Stack Testers Flow Friend | TalkType |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 8 months** | Every 35 months |
| Monetization | Free | — |
| Size | 32 MB | 3 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lewis Holmes](https://appshunter.io/developer/1454834389) | [Care Scribe](https://appshunter.io/developer/1516778367) |

## 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


### TalkType

[App page](https://appshunter.io/ios/app/talktype/id1630726265)

**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 TalkType free?

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

### Do Stack Testers Flow Friend or TalkType have ads?

TalkType shows ads; Stack Testers Flow Friend does not.

### Which is updated more often, Stack Testers Flow Friend or TalkType?

Stack Testers Flow Friend ships an update every 8 months, and TalkType every 35 months. Most recently, Stack Testers Flow Friend was updated on October 5, 2026 and TalkType on October 3, 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.*