SALUS vs DuctCalc.Ca
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SALUS
This app helps manage jobsite safety by allowing users to report and receive alerts for hazards. It provides real-time worker tracking, job status updates, and subcontractor visibility. The application also streamlines time tracking, paperwork management, and document sharing for enhanced site organization and safety.
- Hazard reporting and alerts
- Real-time worker and subcontractor tracking
- Job status updates
- Task management
- Time tracking
- Smart paperwork and document management
- Instant notifications
Read full descriptionHide full description
Salus Features: - Report and get alerted of hazards on or around the jobsite. - See how many people are on your jobsites with GPS. - Check jobs and stay up to date on their status. - Ability to see all subcontractors on site at all times. - Stay on top of outstanding tasks with an easy to use management system. - Fast and easy time tracking for workers to log their hours. - Cover all your liability and stay up-to-date with smart paperwork tracking. - Organize all your paperwork by person and jobsite. - Collect and view documents immediately. - Instantly send signed documents to all involved parties. - Send and receive instant notifications for safety hazards to reduce injuries. - Easy to use photo attachments for all onsite updates.
DuctCalc.Ca
This utility app calculates duct dimensions and air velocity using two methods: Equal Friction and Velocity. It supports both round and rectangular ducts, offering precise calculations for HVAC professionals. Offline functionality is available with a subscription.
- Duct sizing calculator
- Equal Friction Method
- Velocity Method
- Round and rectangular duct support
- Offline functionality
- Full air flow range activation
Read full descriptionHide full description
DuctCalc.Ca is the iOS offline version of the most popular online ductulator app (ductcalc.ca) Enjoy using the app with no internet connection when subscribed! App engineering explanation: ------------------------------ Equal Friction Method: Using a predefined static pressure loss per unit of duct length, DuctCalc.Ca Ductulator App calculates the diameter of round duct and the other dimension of rectangular duct. Based on the calculated dimensions, the air velocity will be calculated for both duct shapes and dimensions. Velocity Method: Using a predefined air velocity, DuctCalc.Ca Ductulator App calculates the diameter of round duct and the other dimension of a rectangular duct. Based on the calculated dimensions, the static pressure loss will be calculated for both duct shapes and dimensions. Note that unlike conventional ductulators, this ductulator will calculate the dimensions of the rectangular duct based on the given velocity and it then calculates the static pressure loss for the rectangular duct based on the given velocity and dimensions. Most old calculators will only use the given velocity to calculate the diameter of the round duct then it calculates the static pressure loss for the round duct and uses that static pressure to calculate the rectangular duct dimensions which is not the case here for more precise velocity output. Colebrook equation is used to solve for Darcy's friction factor and calculates the static pressure loss in the duct until it matches the desired input at defined airflow and absolute roughness of the inner material of the duct touching the moving air. In-App Purchases: ------------------- • With no subscription the app will calculate for an air flow range between (950 and 1100 [cfm]). To activate full air flow functionality. There are four subscription options: one month, three months, six months and one year. • All subscription options will activate the "Full Air Flow Functionality" of the duct sizing app for that specific subscription period. The full air flow range is (1 to 500,000 [CFM] or 1 to 235,974 [L/s] in metric units). • Payment will be charged to iTunes Account at confirmation of purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://ductcalc.ca/?page=agreement Terms of Service: https://ductcalc.ca/?page=agreement
Screenshots
Verdict
The clearest difference is rating: SALUS at 2.5 against DuctCalc.Ca's 1.9. SALUS also leads on in-app purchases (none vs 4) and update cadence (fortnightly vs every 4 months). DuctCalc.Ca's advantage is review sentiment (50% vs 38%) and iOS requirement (11.3 vs 16.0). On price, ratings volume, ads 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
Both are free to download. DuctCalc.Ca sells 4 one-off in-app purchases. SALUS asks for nothing beyond the download.
SALUS holds the better App Store score, 2.5 against 1.9. Both are backed by a comparable volume of ratings — 23 and 20 respectively. Written reviews complicate that: 38% of SALUS's written reviews are positive against 50% of DuctCalc.Ca's, so the app with the better star average is not the one people write more warmly about.
SALUS ships an update fortnightly, DuctCalc.Ca every 4 months. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.
| Parameter | SALUS | DuctCalc.Ca |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (23 ratings) — better | 1.9 (20 ratings) |
| Positive reviews | 37.5% of reviews | 50.0% of reviews — better |
| Number of ratings | 23 — better | 20 |
| Update frequency | Fortnightly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.3 — better |
| Further details — not scored | ||
| Size | 50 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Salus Technologies Inc | Firas Kneifati |
Customer experience
SALUS
DuctCalc.Ca
In-app purchases
SALUS
No in-app purchases
DuctCalc.Ca
- One Month Full Air Flow$6.99
- Three Months Full Air Flow$17.99
- Six Months Full Air Flow$29.99
Show 1 moreShow fewer
- One Year Full Air Flow$49.99









