Connect
Bring your training activities together across supported devices and files. Keep your original data accessible and under your control.
Quantified Self.io
Endurance training intelligence
Bring your Garmin, Suunto, COROS and Wahoo activities together. Understand your training, explore insights with AI, and keep your original files under your control.
Start with manual uploads and training analysis on free Starter. Provider connections and automatic sync require Pro.
Explore the same charts inside Quantified Self.
Pro brings new activities into one history automatically and lets you send them along supported sync paths. Connect Garmin, Suunto, COROS, or Wahoo; you choose which services exchange activities.
Bring your training activities together across supported devices and files. Keep your original data accessible and under your control.
Explore your fitness, fatigue and recovery with advanced training analysis and AI insights grounded in your own data.
Plan personalized workouts, track your progress and make more informed training decisions based on your own history.
Understand your training
See your current load, fitness, fatigue, form, recovery, intensity balance, and efficiency—then explore the charts behind every signal.
Readiness brings load, sleep, and overnight readings together, with sources kept clear. Your Training snapshot keeps current state, recent volume, and exact load-model values in the same hierarchy used by Training.
Sample data · Current state, readiness, recent volume, and exact load-model values in the same hierarchy used by Training.
See how Form, freshness, intensity, efficiency, and power change over time, with readiness, recovery, and sleep views available in Training.
Explore your sport's training mix, compare matching builds, and follow power capacity and long-session durability with the evidence behind each result.
Start from a preset or arrange Curated, KPI, Custom, and Map tiles yourself. Each tile keeps its own filters; maps add style and marker-clustering controls.
Explore every activity
Compare heart rate, power, altitude, depth, pace, and more in synchronized charts. Inspect intensity zones, grade-colored elevation, inverse depth, aerobic durability, and cadence versus power. Switch between distance, duration, or time where supported, then select a range for stats or zoom in.
Plan what comes next
Build or generate your next workout, save your favorites, and organize your plan into named phases. Plan for running, cycling, swimming, walking, hiking, rowing, or strength.
Plans and standalone workouts are free. Sending compatible workouts to connected providers requires Pro.
Generate a workout from Calendar or New Workout using your selected recovery, training and Timeline context. Pro members can opt in to a daily suggestion when they open Today. Review a workout or rest day before adding it.
Start with one standalone workout, or organize dated plans with phases such as Base, Build, Recovery, or Taper. Use your own names, dates, and colors, with date shifting and history.
See your interval profile as you build. Set time, distance, or lap-ended steps, add repeats and heart-rate, power, pace, or cadence targets, then reorder or duplicate blocks. For strength, build exercises, sets, reps or holds, load, and rest.
Keep favorite sessions in your Workout Library. Add a saved workout to one date or repeat it across selected days, in a plan or on its own. Each scheduled copy stays independent.
With separate Training permissions, compatible MCP clients can read your schedule, assess provider compatibility, and prepare bounded plan, workout, or delivery changes for your approval.
Send compatible workouts to Garmin, Suunto, or Wahoo with Pro. Choose a plan to sync or send a workout on its own.
See standalone workouts, active-plan workouts, and phase labels beside completed activities without adding them to recorded totals or Training analysis.
Health beyond training
Follow sleep, heart rate, HRV, and body measurements over time. Bring supported Garmin, Suunto, and COROS health data together, compare each source, and add your own measurements.
Start with your latest readings and 30-day charts. Browse Body, Vitals, Movement & energy, Recovery & sleep, and Fitness, then open a metric’s history. Each recorded source stays separate.
Explore sleep duration, stages, and overnight readings, with each provider clearly identified.
Follow resting heart rate and HRV over time. Compare nightly HRV with your personal range when enough history is available. Add context with notes about travel, sickness, stress, and time away.
Compare sleep, nightly HRV and daily resting heart rate around a Timeline note in matching 7, 14, or 28-day windows. Same-source readings, with coverage shown. Observed differences, not cause and effect.
Log blood pressure, weight, body composition, blood oxygen, and VO₂ max. Follow your readings over time alongside imported health data, with manual entries clearly labelled.
Ask about your training
Explore sleep, readiness, training, measurements, and recent activities in one conversation. The Assistant answers from your current data, with the evidence behind it.
Start with today, a trend, or a recent workout. Ask follow-up questions without starting over.
The Assistant draws from sleep, recovery, training, measurements, and activities when your question needs the broader context.
Each answer shows the data behind it, so you can see exactly what supports it.
Connect ChatGPT or Claude through permission-scoped MCP. Ask them to analyze your training or prepare a bounded Training-plan proposal grounded in your approved data. Timeline note, activity-tag, and Training changes each require separate access and your client’s approval; location access remains separate.
Your activities on a map
See every GPS activity together, then filter by date or activity type and explore the trips across your history.
Real activity traces · open-water swimming, trail running, and mountain biking.
Compare watches and sensors
Compare same-session recordings from watches, bike computers, and sensors. Set reference and test devices, auto-align their timelines, and turn GNSS and sensor differences into repeatable evidence.
Compare R–R intervals and heart rate variability (HRV) when beat-to-beat data is recorded.
Connect Garmin, Suunto, COROS, and Wahoo. New activities arrive automatically, and you can import the activity history already stored with each provider.
Choose automatic delivery between supported providers. You can also send past activities by date range without enabling future sync.
Activity paths: Automatically deliver new workouts or backfill past activities by date range.
Route paths: Deliver imported Suunto routes automatically or on demand. Saved FIT/GPX routes can also be sent manually to Garmin, Suunto, COROS, or Wahoo.
Import FIT, TCX, GPX, JSON, and SML activity files into Quantified Self. You can also send FIT activities directly to Suunto, COROS, or Wahoo for one-off transfers.
A connected watch is optional. Your own activity files work too.
Start free and complete onboarding.
Upload FIT, TCX, GPX, JSON, or SML files, or connect a supported provider with Pro.
Open Calendar, inspect a workout, and build what comes next.
Membership
Core tools are included with Starter. Upgrade for more history, higher Assistant allowances, or connected provider services.
Core tools, free forever.
Everything in Starter, with more history and Assistant requests.
Everything in Basic, plus automatic imports, supported sync and daily workout suggestions.
Paid prices and billing options are shown on the membership page.
Open-source code. Connections you control. Download your original activity files whenever you want—for a backup, a change of service, or analysis elsewhere.
Yes. Upload your own FIT, TCX, GPX, JSON, or SML activity files. A connected watch is optional.
Import files yourself, or connect a supported provider with Pro to import the activity history available from that service.
Starter includes up to 100 activities and 10 saved routes, with training analysis, plans, and standalone workouts. See membership for the full comparison.
Pro supports compatible workout delivery to Garmin, Suunto, and Wahoo. Compatibility depends on the workout and destination; review the Training Plans overview for details.
Yes. Download your original activity files for a backup, a change of service, or analysis elsewhere.
Bring your history together. Understand today. Plan what comes next.