# CoffeeOS — user reviews

> 6 indexed App Store user reviews of CoffeeOS by Shenzhen Digitizing Fluid Technology Co.,Ltd, rated 3.40/5 from 7 ratings.

- Source: https://appshunter.io/ios/app/coffeeos/id6743699611/reviews
- App overview in markdown: https://appshunter.io/ios/app/coffeeos/id6743699611.md
- Rating breakdown: 5★ 4 · 4★ 0 · 3★ 0 · 2★ 1 · 1★ 2

## Most critical reviews (6 lowest-rated)

### 1/5 — Complete Garbage

*2026-06-18*

Downloaded this app for the particle analyzer function. I got the measurements from the website, drew a perfect circle with a compass, and followed the other steps for proper analysis. About. 1 in every 25 photos actually worked. The app itself is supremely buggy: constantly asking for Bluetooth access, and not actually minimizing sub-menus when swiping. If I spent $900 for their actual product, I would be appalled T the quality of this app.

### 1/5 — Promising, but need fixes.

*2026-01-01*

Cool concept, I love the idea of analyzing particles with your phone, but I couldn’t get it to work on my iPhone 14 Pro. After the latest update I can't even edit the grinders.

The grinder manager misses the mark, with settings that are completely off for the MHW-3Bomber R3, which has 60 clicks, 12# per rotation (0-11) and a (normal) maximum of 3 rotations, not 11+ rotations, zero clicks, and 11 numbers. The app shows good intentions, but it needs serious fixes.

### 1/5 — Promising, but need fixes.

*2025-12-09*

Cool concept, I love the idea of analyzing particles with your phone, but I couldn’t get it to work on my iPhone 14 Pro. The grinder manager also misses the mark, with the settings are completely off for the MHW-3Bomber R3, which has 60 clicks, 12# per rotation, and a maximum of 3 rotations, not 11+ rotations, zero clicks, and 11 numbers. The app shows good intentions, but it needs serious fixes.

### 5/5 — Useful for coffee newbies and pros

*2025-09-14*

I don’t own any wireless connected coffee devices, so I’m not able to make use of all the tools in this app, but it’s convenient to have the brew ratio calculator and grinder converter. Just those two tools alone make the app useful to me. I don’t have to use my phone calculator for brew ratios, and I have less wasted coffee when trying to guess the best setting when using someone else’s grinder.

### 5/5 — If you drink coffee you need this app

*2025-09-02*

This app is so well organized and so intuitive.  Easy to use.  They should all be like this.  Try the app over a cup of coffee.

### 5/5 — This app is a game changer

*2025-08-29*

This app will bring about fourth wave coffee. The interconnectivity makes data collection seamless, enjoyable, and smooth. This level of interconnection in coffee has never been done before.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-09.*