# DeltaV CHARM DEWD vs ArcAir

DeltaV CHARM DEWD and ArcAir both sit at 3.9 stars, but that hides the real split: 100% of ArcAir's written reviews are positive against 56% of DeltaV CHARM DEWD's. ArcAir also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). DeltaV CHARM DEWD's advantage is in-app purchases (none vs 2). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. ArcAir sells 2 one-off in-app purchases. DeltaV CHARM DEWD asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.9 for DeltaV CHARM DEWD against 4.0 for ArcAir. Both are backed by a comparable volume of ratings — 15 and 8 respectively. Written reviews are what separate them: 56% of DeltaV CHARM DEWD's written reviews are positive against 100% of ArcAir's.

DeltaV CHARM DEWD ships an update every 4 months, ArcAir every 5 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | DeltaV CHARM DEWD | ArcAir |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (15 ratings)](https://appshunter.io/ios/app/deltav-charm-dewd/id688891028/reviews) | **[4.0 (8 ratings)](https://appshunter.io/ios/app/arcair/id1133492319/reviews)** |
| Number of ratings | **15** | 8 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 64 MB | 21 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Emerson Process Management](https://appshunter.io/developer/561985742) | [Hamilton AG](https://appshunter.io/developer/530886485) |

## 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


### ArcAir

[App page](https://appshunter.io/ios/app/arcair/id1133492319)

This app facilitates the online monitoring and visualization of various sensor data for biotechnological processes. It allows wireless communication with multiple sensors simultaneously and provides central data management, reporting, and validation for sensor calibration and configuration, supporting GMP guidelines.

**Highlights:** Online sensor monitoring, Data visualization, Wireless sensor communication, Central data management, Sensor calibration validation, Paperless workflow support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ArcAir Basic Version | Free | one-time |
| ArcAir Advanced Version | $199.99 | one-time |


## Frequently asked questions

### Is DeltaV CHARM DEWD free?

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

### Is ArcAir free?

ArcAir is free to download, with in-app purchases available.

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

ArcAir is rated higher. DeltaV CHARM DEWD averages 3.9 out of 5 from 15 ratings, while ArcAir averages 4.0 from 8 ratings.

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

Neither DeltaV CHARM DEWD nor ArcAir shows ads.

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

DeltaV CHARM DEWD ships an update every 4 months, and ArcAir every 5 months. Most recently, DeltaV CHARM DEWD was updated on October 23, 2026 and ArcAir on October 29, 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.*