# RE Michel vs Ductulator

The clearest difference is price: RE Michel at Free against Ductulator's $3.99. RE Michel also leads on update cadence (every 6 days vs every 2 months) and iOS requirement (9.3 vs 18.6). Ductulator's advantage is ratings volume (353 vs 5) and chart position (#130 vs unranked). On rating, ads, in-app purchases and monetization model there is nothing between them.

RE Michel is free to download; Ductulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for RE Michel against 4.7 for Ductulator. That said, the two scores are not equally well evidenced: Ductulator has 353 ratings behind it against 5, so its average is the more settled of the two.

RE Michel ships an update every 6 days, Ductulator every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | RE Michel | Ductulator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.6 (5 ratings)](https://appshunter.io/ios/app/re-michel-esp-plus/id1288653398/reviews) | **[4.7 (353 ratings)](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475/reviews)** |
| Number of ratings | 5 | **353** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Free | Free |
| Best chart rank | — | **#130** |
| Size | 9 MB | 1 MB |
| Requires iOS | **9.3** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REMichel](https://appshunter.io/developer/1102547407) | [Wassim Murr](https://appshunter.io/developer/1474939474) |

## What reviewers say

### RE Michel

[App page](https://appshunter.io/ios/app/re-michel-esp-plus/id1288653398)

This app streamlines inventory management and order fulfillment for customers of the RE Michel Company. It facilitates collaboration to change traditional ordering processes by generating replenishment orders based on daily demand information.

**Highlights:** Streamlined inventory management, Automated order fulfillment, Demand-based replenishment orders, Supply chain optimization, Customer-company collaboration

**Features:** macOS Compatibility

**In-app purchases:** none


### Ductulator

[App page](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475)

**Currently charting:** #130 Top Paid · Productivity (US App Store)

Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.

**Highlights:** Instant duct sizing, Friction rate or velocity calculation, Multiple valid duct dimensions, IP and SI units support, Detailed sizing mode, Rectangular, circular, and flexible ducts

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

**In-app purchases:** none

**What reviewers like**

- 👍 Very helpful for duct sizing
- 👍 Easy to use in the field
- 👍 Saves time
- 👍 Seamless imperial/metric transitions
- 👍 Excellent tool for duct design

**What reviewers complain about**

- 👎 App should be free
- 👎 Functionality is pointless for some needs
- 👎 Doesn't help with traditional residential HVAC duct sizing
- 👎 App is a scam
- 👎 Decimal point doesn't work

**Reported bugs**

- Decimal point doesn't work on calculator
- New flex option isn't working properly
- Friction rate can't be changed in the latest version
- Skips duct sizes (e.g., 24-26)

**Requested features**

- Ability to pick duct size and see CFM
- Include flat oval ducts
- Option to select round or square duct
- Ability to enter duct size and get CFM
- Option for flex duct


## Frequently asked questions

### Is RE Michel free?

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

### Is Ductulator free?

Ductulator costs $3.99, with no in-app purchases.

### Which has better reviews, RE Michel or Ductulator?

Ductulator is rated higher. RE Michel averages 4.6 out of 5 from 5 ratings, while Ductulator averages 4.7 from 353 ratings.

### Do RE Michel or Ductulator have ads?

Neither RE Michel nor Ductulator shows ads.

### Which is updated more often, RE Michel or Ductulator?

RE Michel ships an update every 6 days, and Ductulator every 2 months. Most recently, RE Michel was updated on October 24, 2026 and Ductulator on October 25, 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.*