Runs in your browser — nothing to install

Power analysis for coaches
and athletes who dig deep

Drop your FIT files. See power, heart rate, cadence, speed, GPS — instantly. Trim activities, export clean FIT files, compare sessions, sync race video, ask AI about your ride. Whether you coach a team or just yourself, this is the tool that gets out of your way and lets you work.

See All Features
9+
Analysis Views
FIT & SRM
Full Format Support
AI
Built-in Coach
0 installs
Pure Browser

Every watt, every beat, every second

Load a file, see everything. Power, heart rate, cadence, GPS, video — overlaid on one timeline. No waiting, no cloud processing. Your data stays on your machine.

Single Line Chart

Six channels on one timeline. Hover and everything syncs.

Power, heart rate, cadence, speed, temperature, altitude — all overlaid with smooth rendering. A real-time data strip below the chart shows exact values at every datapoint. Pin the cursor, select intervals, compare sessions.

  • Sprint detection tags your peaks automatically
  • Wind overlay shows headwind/tailwind from weather data
  • GPS map with power zone coloring and cursor sync
  • Data strip with per-sample values and channel-colored pill badges
Critical Power Curve

Your best efforts, from 1-second sprints to hour-long grinds

The CP curve shows what you (or your athlete) can actually do at every duration. Overlay historical bests from 30, 90, 180, or 365 days ago to see if you're gaining or losing ground.

  • Power predictions for configurable event distances
  • Historical comparison overlays — spot trends instantly
  • Duration markers from 1s to 60min
Dashboard & PMC

Fitness, fatigue, form — the numbers that matter

CTL, ATL, TSB plotted over time so you can see where you are and where you're headed. Every session logged with power zones, TSS, and custom labels. Tag your rides (Road, Track, Indoor) and filter later.

  • PMC chart tracks training load over weeks and months
  • Power predictions for your configured event distances
  • Full session history — click to load any ride instantly
  • Activity labels for organizing by discipline
AI Analysis

Ask anything about the ride. Get a real answer.

The built-in AI reads your power data, understands zones, pacing, cardiac drift, and sprint efforts. Ask it a question in plain English and get analysis with charts generated on the spot. It knows if you're looking at a road ride or a track session.

  • Natural language — just type what you want to know
  • Generates zone distribution charts, pacing breakdowns
  • Detects cardiac drift, fatigue patterns, pacing errors
  • Context-aware: adapts to your ride type and labels

Your athletes, your data, one place

Add your athletes, let them upload files, track everyone's progress. Or use it solo — it works just as well for one person as for a whole team.

Accounts

Sign up, start uploading

Create an account and you're in. Dashboard, charts, athlete management — everything is there from day one. Your athletes get their own upload page so they can send you files directly.

  • Email alerts when athletes upload new sessions
  • Two-factor auth (TOTP + email OTP)
  • Encrypted storage — even the server can't read your data
  • GDPR compliant with data export and account deletion
Athletes

Track progress over time. Per athlete.

Each athlete has FTP, weight, and discipline. Every session links to them automatically. Watch their CP curve evolve, check their PMC, see which rides moved the needle.

  • FTP, weight, and bio metrics per athlete
  • Dedicated upload page — share a link, they drop a file
  • Per-athlete PMC charts and power predictions
  • Longitudinal tracking across all sessions
Video Sync

Play the race video. The chart follows.

Drop a video alongside your FIT file. The chart cursor follows the video frame by frame — or click anywhere on the chart to jump the video. Draw on the video to mark technique, export slow-motion clips. Works with multiple cameras.

  • Multi-video with thumbnails, tabs, grid, or floating windows
  • 0.25x–4x playback speed, frame-by-frame stepping
  • Drawing overlay — pen, arrows, circles, text on video and chart
  • Slow-motion clip export with annotation burn-in
  • Timer with lap recording synced to video timeline
  • GPS position syncs on the map as the video plays

And there's more where that came from

Trim activities, export clean FIT files, check your calendar, detect sprints — it's all here.

✂️

Trim & Export

Select a range, keep it or cut it out. Timestamps rebase seamlessly. Export as FIT with every field preserved — GPS, L/R balance, Connect IQ developer data. Or CSV. Undo anytime.

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Data Strip

A real-time table below the chart showing exact values at every datapoint. Cursor-synced pill badges per channel. Toggle channels on or off. Like having the numbers right there.

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Slope / Conconi

HR vs. power scatter with automatic deflection detection and PWC150 calculation. Useful for aerobic threshold estimation from ramp tests.

📊

Histograms

Power, HR, cadence, speed distributions. Zone-colored bars show where you spent your time. Quick visual check of any ride's intensity profile.

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Training Calendar

Monthly view with TSS totals per day, weekly summaries, color-coded by load. Click any session to load it. Filter by Road, Track, Indoor.

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GPS Map + Wind

Interactive map with cursor sync and power zone coloring on the route. Wind arrows show headwind/tailwind component overlaid on the chart.

Sprint Detection

Automatically finds sprint efforts using derivative analysis. Tags peak power, duration, and confidence. Useful for track and road sprinters alike.

📝

Notes & Annotations

Drop notes on the timeline, draw on charts and video, record laps. Everything syncs to the cloud and persists across sessions and devices.

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Velodrome Timer

Start, lap, stop — synced to video playback. Every split becomes a marker on the chart. Works with the hardware timing system too.

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FIT & SRM Files

FIT files from Wahoo, Garmin, and others — GPS, developer data, L/R balance, pedal metrics, torque. SRM PowerControl files (SRM5/6/7) too. Up to 4Hz high-frequency data.

Calendar

See your month at a glance

Every session on a calendar. TSS totals, duration, activity labels. Weekly load summaries in the margin. Click any day to load that ride.

Histograms

Where did you spend your time?

Power, HR, cadence, speed — each gets a distribution chart. Power bars are zone-colored so you can see the intensity profile at a glance.

Ready to dig into your data?

Drop a FIT file and see for yourself. No install, no credit card, no catch.