Critical Swim Speed 4+

Calculate & Track CSS Progress

Ed Stivala Limited

    • $2.99

iPhone Screenshots


For Swimmers that take their training seriously and love DATA!
If you want your time in the pool to be as productive as possible consider training at your 'critical swim speed'. This app will calculate that number for you (based on a standard testing protocol). If you are unsure what the swim test is, I have included details in the app for you.
- Calculate your CSS
- Log your results so you can track your progress
- Set an alert to be reminded when your next test is due

A simple to use app that helps you train more effectively and tracks your progress.

What’s New

Version 1.2.0

In this release I have made a small improvement to the CSS History Log to show when your next CSS evaluation swim is due.
This will default to 6 weeks or use the CSS reminder value if you have set it in the Settings. Please note that this is independent of the Alert Reminder, so even if you have switched Alerts off the App will still use the value you set on the slider.

Thanks for all the great suggestions sent through the Feature Request. And of course thank you for supporting my work by buying this app - hugely appreciated! Happy Swimming

App Privacy

The developer, Ed Stivala Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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