# Blink vs Stack Testers Flow Friend

The clearest difference is review sentiment: Blink at 51% against Stack Testers Flow Friend's 0%. Blink also leads on update cadence (every 5 days vs every 8 months). Stack Testers Flow Friend's advantage is iOS requirement (13.0 vs 18.0). 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.

Blink ships an update every 5 days, Stack Testers Flow Friend every 8 months. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Blink | Stack Testers Flow Friend |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (445 ratings)](https://appshunter.io/ios/app/blink-the-frontline-app/id1046583493/reviews)** | — |
| Number of ratings | **445** | — |
| Positive reviews | **51.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 8 months |
| Monetization | Free | Free |
| Size | 709 MB | 32 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Super Smashing Ltd](https://appshunter.io/developer/945090717) | [Lewis Holmes](https://appshunter.io/developer/1454834389) |

## What reviewers say

### Blink

[App page](https://appshunter.io/ios/app/blink-the-frontline-app/id1046583493)

This app provides frontline workers with a single platform for accessing essential tools, apps, and communications. It aims to boost engagement and retention by centralizing information and streamlining access to workplace applications.

**Highlights:** Centralized Hub for files, assets, and tools, Targeted announcement and story feed, Integrated messenger with group and 121 chats, Micro apps for specific functions (payslips, leave), Single Sign-On for seamless app access, Digital replacement for paper and noticeboards

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to navigate
- 👍 Keeps employees informed
- 🚀 Everything in one place
- 👍 User-friendly
- 🚀 Great communication tool

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔒 Restricted functionality
- 💡 Lack of customization options
- 🐛 Glitchy performance
- 💡 Missing important features

**Reported bugs**

- Login issues after device change
- Duty board information not syncing
- Images not displaying properly
- Frequent app crashes
- Unable to download payslips

**Requested features**

- Add video upload capability
- Improve calendar integration
- Provide more reaction options
- Allow users to customize feed
- Implement dark mode


### 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


## Frequently asked questions

### Is Blink free?

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

### Is Stack Testers Flow Friend free?

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

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

Neither Blink nor Stack Testers Flow Friend shows ads.

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

Blink ships an update every 5 days, and Stack Testers Flow Friend every 8 months. Most recently, Blink was updated on October 15, 2026 and Stack Testers Flow Friend on October 5, 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.*