DuctCalc.ca – SaaS Engineering Tool with Stripe & iOS App

DuctCalc.ca is a specialized online tool for mechanical engineers and HVAC designers to calculate air duct specifications including size, air velocity, and static pressure drop. The platform includes both a web application and a native iOS app.

Key Achievements

• Designed and implemented engineering algorithms for duct calculations
• Built custom WordPress theme and plugin for the application interface
• Integrated Stripe APIs for subscription billing with custom cancellation handling
• Created real-time 2D duct shape visualization using HTML5 Canvas and JavaScript
• Developed and published iOS app on the App Store with in-app purchases
• Implemented freemium model: basic features free, premium features via Stripe subscription

Technologies Used

PHP, MySQL, JavaScript, HTML5 Canvas, jQuery, Bootstrap, WordPress, Stripe API, Swift, iOS Development, Xcode, In-App Purchases