# DeltaV CHARM DEWD vs QSpec

DeltaV CHARM DEWD and QSpec both sit at 4.1 stars, but that hides the real split: 56% of DeltaV CHARM DEWD's written reviews are positive against 0% of QSpec's. DeltaV CHARM DEWD also leads on update cadence (every 4 months vs every 15 months) and iOS requirement (16.0 vs 18.0). On price, rating, ratings volume 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 — 4.1 for DeltaV CHARM DEWD against 4.0 for QSpec. Both are backed by a comparable volume of ratings — 14 and 6 respectively. Written reviews are what separate them: 56% of DeltaV CHARM DEWD's written reviews are positive against 0% of QSpec's.

DeltaV CHARM DEWD ships an update every 4 months, QSpec every 15 months. Both last shipped on June 1, 2026.

## The numbers

| Metric | DeltaV CHARM DEWD | QSpec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (14 ratings)](https://appshunter.io/ios/app/deltav-charm-dewd/id688891028/reviews)** | [4.0 (6 ratings)](https://appshunter.io/ios/app/qspec/id1155111447/reviews) |
| Number of ratings | **14** | 6 |
| Positive reviews | **55.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 64 MB | 36 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Emerson Process Management](https://appshunter.io/developer/561985742) | [Linde GmbH](https://appshunter.io/developer/657403417) |

## 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


### QSpec

[App page](https://appshunter.io/ios/app/qspec/id1155111447)

This app helps manage gas cylinder inventory, track blend components, and monitor expiration dates for optimal process performance. It simplifies cylinder tracking and provides on-demand electronic Certificates of Analysis.

**Highlights:** Scan and store cylinder information, Track blend expiration dates, Set expiration alerts, Retrieve and email ECOAs, Create and email reorder lists, Assign cylinders to locations

**Features:** macOS Compatibility

**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 QSpec free?

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

### Which has better reviews, DeltaV CHARM DEWD or QSpec?

DeltaV CHARM DEWD is rated higher. DeltaV CHARM DEWD averages 4.1 out of 5 from 14 ratings, while QSpec averages 4.0 from 6 ratings.

### Do DeltaV CHARM DEWD or QSpec have ads?

Neither DeltaV CHARM DEWD nor QSpec shows ads.

### Which is updated more often, DeltaV CHARM DEWD or QSpec?

DeltaV CHARM DEWD ships an update every 4 months, and QSpec every 15 months. Most recently, DeltaV CHARM DEWD was updated on June 1, 2026 and QSpec on June 1, 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.*