by 01 Apps
TextFit
Create structured workouts from plain text — in any language.
Write your workout like a text message — in any language. TextFit turns it into a structured workout and sends it straight to your watch or bike computer. No clunky builders, no dragging blocks around.
Write in plain text
Type your intervals, sets, and paces however you'd say them. Any language works.
AI structures it
Your text becomes a proper structured workout you can review and tweak in seconds.
Syncs to any device
Sends the finished workout straight to your watch and head unit — Garmin, Wahoo, and more.
Free training tools
Quick calculators to plan your training — no sign-up needed.
Race Time Predictor
Predict your 5K to marathon finish time and running pace from a recent run.
Open calculator →W/kg & FTP Zones Calculator
Get your cycling power-to-weight ratio and all six power zones from your FTP.
Open calculator →Sweat Rate Calculator
Work out how much fluid you lose per hour and how much to drink in training.
Open calculator →Carb & Fueling Calculator
Get your carbs-per-hour target and a practical gel and bottle plan for long sessions.
Open calculator →Heart Rate Zones Calculator
Calculate your five HR training zones with the Karvonen or LTHR method.
Open calculator →