CPS Link vs Ductulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPS Link
Connect multiple wireless sensors to create a comprehensive diagnostic measurement system. Perform quick single measurements or complex full system diagnostics with analytics. Expand your system over time with new sensor solutions.
- Connect multiple wireless sensors
- Comprehensive diagnostic measurement system
- Perform quick measurements
- Complex system diagnostics with analytics
- Expandable sensor system
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CPS Link™ is a powerful, easy-to-use application that connects multiple CPS wireless sensors together at one time to create the world’s most comprehensive diagnostic measurement system. The flexibility of this patented system enables users to add sensors as required to perform quick one-step measurement tasks or more complex full home, facility or system diagnostics with analytics. A range of high quality wireless sensors are available to accommodate most common HVAC/R service needs, with more innovative sensor solutions in various levels of release and development. Interconnectivity between the CPS Link app and future sensors remains a primary criterion to provide users with the flexibility of building their own custom measurement systems, over time.
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: CPS Link at Free against Ductulator's $3.99. CPS Link also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (11.0 vs 18.6). Ductulator's advantage is rating (4.7 vs 1.9) and review sentiment (50% vs 13%). On ratings volume, 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
CPS Link 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 1.9. Both are backed by a comparable volume of ratings — 154 and 317 respectively. Written reviews point the same way: 13% of CPS Link's written reviews are positive against 50% of Ductulator's.
CPS Link ships an update every 3 weeks, Ductulator every 2 months. The most recent releases landed on September 12, 2026 and September 22, 2026 respectively.
| Parameter | CPS Link | Ductulator |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 1.9 (154 ratings) | 4.7 (317 ratings) — better |
| Positive reviews | 13.5% of reviews | 50.0% of reviews — better |
| Number of ratings | 154 | 317 — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | — | #27 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 85 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | CPS Products, Inc. | Wassim Murr |
Customer experience
CPS Link
Ductulator
Bugs and requests
CPS Link
Reported bugs
4 issues- App crashes on launch
- Bluetooth connectivity problems
- Inconsistent readings and measurements
- Incompatible with newer iOS versions
Requested features
3 requests- Update app to fix compatibility issues
- Improve customer support and responsiveness
- Provide better documentation and troubleshooting guides
Ductulator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
CPS Link
No in-app purchases
Ductulator
No in-app purchases
