What it does
Intervals.icu is a multisport training platform with a free core and paid Supporter extras. It combines activity analysis, performance charts, sport-specific zones, a training calendar and a structured workout builder.
Begin with an activity history you already record, then choose a chart that answers a concrete question. The platform separates sports and zones, which is useful when running and cycling should not share identical settings. Activity timelines and power curves offer more detailed analysis than a simple list of sessions.
The calendar supports planning and weekly totals. Its workout builder accepts structured steps for power, heart rate, pace or cadence and lists import and export formats including FIT and ZWO. That makes it useful for athletes who want to organize sessions as well as inspect completed activity. Start with one sport's settings before building a full season.
The free core includes activity analysis and the training calendar. Supporter adds features such as advanced weather analysis, full Strava-history import, an annual training-plan builder and route matching. Compare those extras with the data and planning tasks you actually need before upgrading.
Strengths
- Multisport settings keep zones and activity analysis distinct.
- The calendar and workout builder connect planning with recorded sessions.
Best for
- Endurance athletes who want detailed analysis and workout planning.
Sources
- Free Cycling, Running, Triathlon Training Platform (Oct 26, 2026)