Ductulator vs CoolCalc Scan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
CoolCalc Scan
Capture precise 3D room scans using your device's LiDAR sensor. Organize projects, integrate with a web platform for advanced visualization, and export models in industry-standard formats. Ideal for professionals needing accurate spatial data.
- Precise LiDAR scanning
- Detailed 3D model capture
- Project organization
- CoolCalc platform integration
- Industry-standard export formats
- Multi-room scanning
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Free Scanning — Paid Web Features This iOS app is a companion to CoolCalc. Scanning is free. To use your scan results for ACCA Manual J, Manual S, or Manual D calculations, you’ll need a separate paid subscription or single-project purchase in app.coolcalc.com, our web app. KEY FEATURES • Precise LiDAR Scanning Capture detailed 3D models of rooms with accurate measurements. Document walls, ceilings, windows, doors, and room geometry with professional-grade precision. • Project Organization Create projects for different properties or jobs. Scan multiple rooms and keep everything organized in one place. • CoolCalc Platform Integration Connect your scans with the CoolCalc web platform. Upload your models for advanced processing and visualization with interactive 3D viewers. • Professional Export Export your 3D models in industry-standard formats. Share scans with clients, colleagues, or use them in other professional tools. • Multi-Room Scanning Document entire properties efficiently. Scan room by room and combine them into complete building models. IDEAL FOR Perfect for HVAC professionals, contractors, architects, interior designers, and anyone who needs accurate spatial measurements for their work. REQUIREMENTS • iPhone or iPad with LiDAR sensor (iPhone 12 Pro and later, iPad Pro 2020 and later) • iOS 17.5 or later • Account required for platform integration features
Screenshots
Verdict
The clearest difference is review sentiment: Ductulator at 50% against CoolCalc Scan's 0%. Ductulator also leads on rating (4.7 vs 2.6) and ratings volume (317 vs 7). CoolCalc Scan's advantage is price (Free vs $3.99) and update cadence (every 4 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement 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
CoolCalc Scan is free to download; Ductulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Ductulator holds the better App Store score, 4.7 against 2.6. That said, the two scores are not equally well evidenced: Ductulator has 317 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 50% of Ductulator's written reviews are positive against 0% of CoolCalc Scan's.
Ductulator ships an update every 2 months, CoolCalc Scan every 4 weeks. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.
| Parameter | Ductulator | CoolCalc Scan |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.7 (317 ratings) — better | 2.6 (7 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 317 — better | 7 |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Best chart rank | #97 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 | 17.5 — better |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Wassim Murr | Cool Calc Inc. |
Customer experience
Ductulator
CoolCalc Scan
Bugs and 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
CoolCalc Scan
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Ductulator
No in-app purchases
CoolCalc Scan
No in-app purchases
Questions
Is Ductulator free?
Is CoolCalc Scan free?
Which has better reviews, Ductulator or CoolCalc Scan?
Do Ductulator or CoolCalc Scan have ads?
Which is updated more often, Ductulator or CoolCalc Scan?
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