DeltaV CHARM DEWD vs QSpec
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DeltaV CHARM DEWD
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.
- 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
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The DEWD abides helping you diagnose and wire DeltaV CHARMs. Using the camera on your mobile device, intuitively scan the CHARM LED to instantly understand the meaning of the blink pattern or scan the CHARM Label for text recognition to swiftly find the associated wiring diagram. You can quickly understand why a CHARM LED is flashing or efficiently view a CHARM’s wiring diagram. You can also browse or search for results instead of scanning. For any given result, you can store it as a Favorite, Create or Edit (existing) Notes, or Share in context with a colleague.
QSpec
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.
- 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
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Unleash the power of productivity with Linde’s QSpec. Quickly verify gas blend components and mix accuracy, and track the expiration date of your gas blends to maintain optimal process performance. Simplify cylinder management and cylinder tracking by using your phone as a mobile database of your cylinder information with QSpec. Quickly access on-demand Electronic Certifications of Analysis (ECOA) for each cylinder you scanned into your phone. QSpec Features: • Scan and store cylinder information, blend expiration dates and blend specifications in your phone. • Set alerts to monitor and prevent gas blend expiration dates to ensure process quality. • Quickly retrieve and email ECOA’s • Create, store and email your cylinder reorder list. • Assign scanned cylinders to customizable locations to assist with cylinder tracking
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | DeltaV CHARM DEWD | QSpec |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (14 ratings) — better | 4.0 (6 ratings) |
| Positive reviews | 55.6% of reviews — better | 0.0% of reviews |
| Number of ratings | 14 — better | 6 |
| Update frequency | Every 4 months — better | Every 15 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 64 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Emerson Process Management | Linde GmbH |
Customer experience
DeltaV CHARM DEWD
QSpec
In-app purchases
DeltaV CHARM DEWD
No in-app purchases
QSpec
No in-app purchases
