# Flow Rate Converter vs DeltaV CHARM DEWD

The clearest difference is price: DeltaV CHARM DEWD at Free against Flow Rate Converter's $0.99. DeltaV CHARM DEWD also leads on ratings volume (15 vs 1). Flow Rate Converter's advantage is review sentiment (100% vs 56%) and rating (5.0 vs 3.9). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

DeltaV CHARM DEWD is free to download; Flow Rate Converter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Flow Rate Converter holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: DeltaV CHARM DEWD has 15 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Flow Rate Converter's written reviews are positive against 56% of DeltaV CHARM DEWD's.

Flow Rate Converter ships an update every 7 months, DeltaV CHARM DEWD every 4 months. The most recent releases landed on October 19, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Flow Rate Converter | DeltaV CHARM DEWD |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flow-rate-converter/id668446877/reviews)** | [3.9 (15 ratings)](https://appshunter.io/ios/app/deltav-charm-dewd/id688891028/reviews) |
| Number of ratings | 1 | **15** |
| Positive reviews | **100.0% of reviews** | 55.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 64 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Johan van der Vyver](https://appshunter.io/developer/668446880) | [Emerson Process Management](https://appshunter.io/developer/561985742) |

## What reviewers say

### Flow Rate Converter

[App page](https://appshunter.io/ios/app/flow-rate-converter/id668446877)

This utility app calculates flow rates in milliliters per hour based on substance concentration and dosage. It can also determine the required dosage for a set flow rate. Features a user-friendly interface and an iPad widget for quick calculations.

**Highlights:** Calculate flow rate in ml/h, Determine required dosage, User-friendly Picker interface, iPad widget for quick access, Specialized for concentration and dosage

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Flow Rate Converter free?

Flow Rate Converter costs $0.99, with no in-app purchases.

### Is DeltaV CHARM DEWD free?

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

### Which has better reviews, Flow Rate Converter or DeltaV CHARM DEWD?

Flow Rate Converter is rated higher. Flow Rate Converter averages 5.0 out of 5 from 1 ratings, while DeltaV CHARM DEWD averages 3.9 from 15 ratings.

### Do Flow Rate Converter or DeltaV CHARM DEWD have ads?

Neither Flow Rate Converter nor DeltaV CHARM DEWD shows ads.

### Which is updated more often, Flow Rate Converter or DeltaV CHARM DEWD?

Flow Rate Converter ships an update every 7 months, and DeltaV CHARM DEWD every 4 months. Most recently, Flow Rate Converter was updated on October 19, 2026 and DeltaV CHARM DEWD on October 23, 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.*