RE Michel vs Ductulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RE Michel
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.
- Streamlined inventory management
- Automated order fulfillment
- Demand-based replenishment orders
- Supply chain optimization
- Customer-company collaboration
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ESP Plus is a streamlined approach to inventory management and order fulfillment provided by the RE Michel Company for our customers. This involves collaboration between the RE Michel Company and our customers which changes the traditional ordering process. We will generate replenishment orders for customers based on daily demand information they submit to us. The goal of ESP Plus is to align business objectives and streamline supply chain operations for both RE Michel Company and our customers. The right products are continually pulled into the right places at the right time with continuous replenishment at the point of consumer purchase or usage.
Ductulator
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.
- 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
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Size HVAC ducts instantly using airflow, friction or velocity. Get accurate duct dimensions in seconds — no charts required. • Get a range of suitable duct sizes based on friction rate or velocity. • Get multiple valid duct dimensions instantly. • Tap on Friction Rate or Velocity to toggle between calculation methods. • IP and SI units. • Detailed sizing mode to adjust the duct dimensions and air flow rates. • Supports rectangular, circular and flexible ducts. • Automatic friction and velocity updates. Calculations are based on standard air 0.075 lb/ft3 (1.2 kg/m3) in clean galvanized steel or non-metallic flexible ducts. Any feedback is welcome, and will be the basis for future updates.
Screenshots
Verdict
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 (#97 vs unranked). On rating, ads, in-app purchases and monetization model 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
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.
| Parameter | RE Michel | Ductulator |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.6 (5 ratings) | 4.7 (353 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 5 | 353 — better |
| Update frequency | Every 6 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | — | #97 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.3 — better | 18.6 |
| Further details — not scored | ||
| Size | 9 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | REMichel | Wassim Murr |
Customer experience
RE Michel
Ductulator
Bugs and requests
RE Michel
Not enough reviews yet to summarise bugs or requests.
Ductulator
Reported bugs
4 issues- 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
5 requests- 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
In-app purchases
RE Michel
No in-app purchases
Ductulator
No in-app purchases
Questions
Is RE Michel free?
Is Ductulator free?
Which has better reviews, RE Michel or Ductulator?
Do RE Michel or Ductulator have ads?
Which is updated more often, RE Michel or Ductulator?
Other comparisons
