Free training tools and plain-language guides.
The same coaching ideas TrailFree runs on your phone, explained here for anyone. No account, no sign-up, and every calculator runs entirely in your browser. Free to use whether you have the app or not.
Training plan calculator
Enter a goal and a date, and see a safe week-by-week build to it, or the earliest date that is realistic.
Open the calculatorHeart-rate zone calculator
Turn your max heart rate into the simple easy, tempo and interval bands the trainer uses.
Open the calculatorIs my goal realistic?
How to tell whether your event date gives you enough time, in plain terms.
Read the guideProgressive overload
Why training load should rise gradually, and why the 10% rule is a ceiling, not a promise.
Read the guideThe recovery week
Three weeks on, one week easy. Why fitness is built in the rest, not the effort.
Read the guideTapering for your event
Ease off in the last week or two and arrive fresh. What to cut, and what to keep.
Read the guideEasy days easy, hard days hard
Why most of your training should feel genuinely easy, with a small dose of quality.
Read the guideStrength library
Thirteen coach-built routines and a 22-move glossary, by focus: cycling, running, everyday and more. Free to read and print.
Browse strengthWant the full picture of how the on-device coach thinks? Read how the trainer works, every rule and formula, or see what is free and what Pro adds.