# DeltaV CHARM DEWD vs OPTICHECK Flow Mobile

The clearest difference is ratings volume: DeltaV CHARM DEWD at 15 against OPTICHECK Flow Mobile's 2. On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 3.9 for DeltaV CHARM DEWD against 4.0 for OPTICHECK Flow Mobile. That said, the two scores are not equally well evidenced: DeltaV CHARM DEWD has 15 ratings behind it against 2, so its average is the more settled of the two.

DeltaV CHARM DEWD ships an update every 4 months, OPTICHECK Flow Mobile every 3 months. The most recent releases landed on October 23, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | DeltaV CHARM DEWD | OPTICHECK Flow Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (15 ratings)](https://appshunter.io/ios/app/deltav-charm-dewd/id688891028/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/opticheck-flow-mobile/id1476806101/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 64 MB | 361 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Emerson Process Management](https://appshunter.io/developer/561985742) | [KROHNE Messtechnik GmbH](https://appshunter.io/developer/1445655816) |

## What reviewers say

### DeltaV CHARM DEWD

[App page](https://appshunter.io/ios/app/deltav-charm-dewd/id688891028)

Diagnose and wire DeltaV CHARMs using your mobile device's camera. Scan CHARM LEDs to understand blink patterns or scan labels for wiring diagrams. Quickly access information, save favorites, add notes, and share with colleagues.

**Highlights:** Scan CHARM LED blink patterns, Scan CHARM labels for text recognition, Instantly understand blink pattern meanings, Swiftly find associated wiring diagrams, Browse and search for results, Store results as Favorites, Create or edit Notes, Share information with colleagues

**Features:** macOS Compatibility

**In-app purchases:** none


### OPTICHECK Flow Mobile

[App page](https://appshunter.io/ios/app/opticheck-flow-mobile/id1476806101)

This utility app facilitates the wireless setup, verification, and ongoing monitoring of specific KROHNE flow meters. It enables secure Bluetooth® connectivity for device configuration and performance checks without interrupting ongoing measurements.

**Highlights:** Wireless device commissioning, Device parameterization via Bluetooth®, Verification without measurement interruption, Monitoring of meter performance, Monitoring of application parameters

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DeltaV CHARM DEWD free?

DeltaV CHARM DEWD is free to download, with no in-app purchases.

### Is OPTICHECK Flow Mobile free?

OPTICHECK Flow Mobile is free to download, with no in-app purchases.

### Which has better reviews, DeltaV CHARM DEWD or OPTICHECK Flow Mobile?

OPTICHECK Flow Mobile is rated higher. DeltaV CHARM DEWD averages 3.9 out of 5 from 15 ratings, while OPTICHECK Flow Mobile averages 4.0 from 2 ratings.

### Do DeltaV CHARM DEWD or OPTICHECK Flow Mobile have ads?

Neither DeltaV CHARM DEWD nor OPTICHECK Flow Mobile shows ads.

### Which is updated more often, DeltaV CHARM DEWD or OPTICHECK Flow Mobile?

DeltaV CHARM DEWD ships an update every 4 months, and OPTICHECK Flow Mobile every 3 months. Most recently, DeltaV CHARM DEWD was updated on October 23, 2026 and OPTICHECK Flow Mobile on October 13, 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.*