Your Intervals.icu Companion, On the Go.
Seamlessly track your fitness, analyze activities, and stay on top of your training plan with the essential mobile companion for Intervals.icu users.
Why Choose Subintervals?
Unlock the full potential of your Intervals.icu data with a dedicated mobile experience.
Seamless Integration
Connects directly with your Intervals.icu account. No extra setup, just your data, mobile-ready.
Comprehensive Tracking
Visualize your fitness, fatigue, form, and ramp rate with insightful charts and detailed activity logs.
Organized & Accessible
Access your training calendar, planned workouts, and activity details anytime, anywhere.
Always Improving
Regular updates with new features and enhancements based on community feedback.
How It Works
Three steps from your Intervals.icu account to training insights on the go.
Step 1
Connect
Log in with your existing Intervals.icu account. No new passwords or sign-up forms.
Step 2
View
See fitness charts, your training calendar, and detailed activity analysis on your phone.
Step 3
Train
Review planned workouts, follow intervals, and stay on track wherever you ride or run.
Get Started in Seconds
Log in directly with your existing Intervals.icu account. No new passwords, no lengthy sign-ups. Your training data is instantly available on your mobile device.
Visualize Your Fitness Journey
Track key performance metrics with clear, easy-to-understand charts. Monitor your Fitness (CTL), Fatigue (ATL), Form (TSB), and Ramp Rate to make informed training decisions.
Training Calendar & Workouts
Your full training schedule, planned workouts, and workout builder — all synced with Intervals.icu and ready on your phone.
- View past and upcoming workouts, activities, and events in timeline and month views.
- The Add Workout menu keeps creation fast and focused.
- Plan workouts, notes, or track events like sickness, holidays, and rest days.
- Workout charts appear directly in the calendar for quick context.
- Access detailed planned workout descriptions with target power zones and durations.
- Edit or delete workouts after creation for full control over your calendar.
- Use the Builder tab with a code editor, live visual chart, and zone distribution.
Dive Deep into Every Activity
Go beyond summary stats. Subintervals provides detailed charts and customization options for a thorough analysis of each workout:
- Interactive charts for Heart Rate, Power, Cadence, and Altitude.
- Easily edit activity titles for better organization.
- Log RPE (Rate of Perceived Exertion) and how you felt.
- Add personal notes to remember key details about your session.
Profile & Settings
Your personal hub and app preferences, all in one place.
Your Personal Hub
The profile section gives you a quick overview and access to your core information within the app.
Help & Support
Tailor the app to your preferences in Settings. This is also where you can choose to support Subintervals through a donation, helping to fund ongoing development and new features.
Want the full picture?
Explore every feature and follow along with each release in the changelog.
See all features & release historyReady to Elevate Your Training Analysis?
Download Subintervals today and experience your Intervals.icu data like never before. Take control, gain insights, and achieve your fitness goals.
Free to download · Syncs with your existing Intervals.icu account