ErgSwap: Cardio Converter
Run, Row, Ski & Bike Swaps
About
Easily convert cardio workouts between different machines. Input your intended exercise and distance/calories, and get equivalent efforts for running, rowing, skiing, and biking. Supports various models and units, with options for scaled or flat conversions.
What's New in ErgSwap
1.2.2
September 13, 2026
• Polish and under-the-hood improvements.
Developer apps
FAQ
How does ErgSwap convert workouts?
ErgSwap uses published conversion charts to calculate equivalent efforts. You enter the workout as programmed for one machine, and it displays the equal-effort piece for other cardio machines available in your gym.
What cardio machines does ErgSwap support?
ErgSwap supports a variety of machines including treadmills, Concept2 RowErgs, Rogue Echo Rowers, Concept2 SkiErgs, Rogue Echo SKIs, Concept2 BikeErgs, and Rogue Echo Bikes.
Can I use ErgSwap offline?
Yes, ErgSwap runs entirely on your iPhone and does not require a network connection. It operates without ads, subscriptions, or tracking of any kind.
Does ErgSwap account for differences between men's and women's conversions?
Yes, ErgSwap displays both men's and women's published conversions side-by-side, allowing coaches to read one screen for mixed classes. You can also select to view only your specific conversion.
What is the difference between 'scaled' and 'flat' conversions in ErgSwap?
The 'scaled' option follows published charts that adjust ratios for longer distances, while the 'flat' option uses a single, consistent ratio per machine. ErgSwap indicates when the flat conversion starts to significantly differ.
Is ErgSwap suitable for all ages?
ErgSwap has an age rating of 4+, making it suitable for a wide range of users. The app focuses on providing workout equivalencies for cardio machines.
How often is ErgSwap updated?
The latest version of ErgSwap is 1.2, which was last updated on August 31, 2026. Updates typically include improvements and additions based on user feedback and updated conversion data.
Does ErgSwap have ads?
No, ErgSwap is completely ad-free. The app is designed to provide a distraction-free experience for users focused on their workouts.