CookTools vs Ductulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CookTools
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The smartphone is the new toolbox. Is yours loaded with the latest tools? CookTools is a suite of design tools in one convenient app Fan Law Calculator – Quickly determine new operating point from known conditions Sound Calculator – Compute LwA, dBA, Sones and NC from octave band data Duct Designer – Quickly calculate rectangular and round duct sizes that meet your system needs Area Calculator – Compute section properties for round and rectangular shapes Download today!
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: CookTools at Free against Ductulator's $3.99. CookTools also leads on iOS requirement (7.0 vs 18.6). Ductulator's advantage is update cadence (every 2 months vs every 7 months) and chart position (#68 vs unranked). On ads, in-app purchases and device support 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
CookTools is free to download; Ductulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CookTools ships an update every 7 months, Ductulator every 2 months. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.
| Parameter | CookTools | Ductulator |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 4.7 (317 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | — | 317 — better |
| Update frequency | Every 7 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Best chart rank | — | #68 — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 144 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Loren Cook Company | Wassim Murr |
In-app purchases
CookTools
No in-app purchases
Ductulator
No in-app purchases
