Tools

Free apps I built for training and nutrition. Each one opens on its own site.

Power-duration app

Estimates your power-duration profile from 5 maximal tests on an ergometer: 45 seconds, then 3, 6, 10, and 20 minutes, spread over about 11 days. It's built for home-gym athletes and coaches who can read average watts off the machine.

You get a fitted curve, predicted power from 1 to 60 minutes, critical power and W′, and training targets tied to specific durations. The app saves nothing between sessions, so download your history file before you close it.

Maintenance macro calculator

Estimates the calories you need to maintain your weight and gives you a starting split of protein, carbs, and fat. It takes imperial or metric inputs, activity level, how often you lift, your protein preference, and body fat percentage if you know it.

Treat the numbers as a starting point. Adjust based on how your weight trends over a few weeks.

The apps are free. If you'd like to support them, there's a tip jar.

Questions or bugs? Tell me in Discord or email me at ben.skutnik@gmail.com.