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About
Performance Analyzer is a powerful, zero-install cycling analytics platform built for coaches and athletes who want deep insight into their training data. Simply drop a FIT or SRM file into the browser and immediately access nine-plus analysis views including a six-channel synchronized timeline of power, heart rate, cadence, speed, temperature, and altitude. The Critical Power (CP) curve reveals peak efforts from 1-second sprints to 60-minute sustained outputs, with historical overlays spanning 30 to 365 days so progress (or regression) is immediately visible. The Performance Management Chart (PMC) tracks CTL, ATL, and TSB over time, giving athletes and coaches a clear picture of fitness, fatigue, and form. Built-in AI analysis lets users ask natural language questions about any ride — receiving zone distribution charts, pacing breakdowns, cardiac drift detection, and fatigue pattern identification in return. Video sync allows race footage to be played alongside the data chart, with cursor and video frame staying in lockstep. The Coach Platform supports multi-athlete management: athletes get a dedicated upload link, coaches receive email alerts on new sessions, and per-athlete FTP, weight, and discipline metrics are tracked longitudinally. The platform uses encrypted storage, supports two-factor authentication (TOTP + email OTP), and is fully GDPR compliant with data export and account deletion options. Performance Analyzer is a compelling alternative to TrainingPeaks, WKO, and Golden Cheetah — delivering professional-grade analysis entirely in the browser, free for coaches and athletes.
Key Features
- Multi-Channel Timeline Analysis: Overlay power, heart rate, cadence, speed, temperature, and altitude on a single synchronized chart with per-sample data strip and sprint auto-detection.
- Critical Power Curve: Visualize best efforts from 1-second to 60-minute durations, with historical comparison overlays (30–365 days) to track performance trends over time.
- AI Ride Analysis: Ask plain-English questions about any ride and receive AI-generated insights including zone charts, pacing analysis, cardiac drift detection, and fatigue patterns.
- Performance Management Chart (PMC): Track CTL, ATL, and TSB over weeks and months with full session history, discipline tags, and power zone breakdowns per ride.
- Coach & Multi-Athlete Platform: Manage multiple athletes with dedicated upload links, email alerts on new sessions, per-athlete FTP tracking, and longitudinal CP and PMC reporting.
Use Cases
- A cycling coach managing a team of 10 athletes uploads each athlete's weekly FIT files to track CTL/ATL trends and identify who is peaking versus overreaching before a key race.
- An amateur cyclist uses the Critical Power curve to compare their current 5-minute and 20-minute power bests against a baseline from six months ago to measure pre-season fitness gains.
- A competitive cyclist syncs race video with their power file after a criterium to review exactly where power dropped, cadence spiked, or heart rate exceeded threshold during specific corners and climbs.
- A coach asks the AI 'Did my athlete show signs of fatigue in the second half of this ride?' and receives an instant breakdown of cardiac drift, power decoupling, and pacing efficiency.
- An indoor trainer uses the PMC chart and session history to plan taper timing before a gran fondo, filtering rides by 'Indoor' label to isolate structured training blocks.
Pros
- Zero Installation Required: Runs entirely in the browser with no downloads, plugins, or cloud processing — data stays local on the user's machine for privacy and speed.
- Built-in AI Analysis: Natural language Q&A about rides, with AI-generated charts and context-aware insights, is rare in cycling analytics tools and adds significant value.
- Comprehensive Coaching Tools: Multi-athlete management, encrypted storage, 2FA, GDPR compliance, and email alerts make it a serious platform for professional coaches.
- Free to Use: Full feature access for coaches and athletes at no cost, making it a strong alternative to expensive paid platforms like TrainingPeaks or WKO.
Cons
- Cycling-Specific Scope: Designed exclusively for cycling data (FIT/SRM files), so athletes in other endurance sports like running or triathlon have limited utility.
- No Mobile App: The platform is browser-only with no dedicated iOS or Android app, which may be limiting for athletes who prefer reviewing data on mobile devices.
- No Native Device Sync: Unlike TrainingPeaks or Garmin Connect, there is no automatic sync with GPS devices or third-party platforms — files must be manually uploaded.
Frequently Asked Questions
Does Performance Analyzer require installation or a desktop app?
No. Performance Analyzer runs entirely in your web browser. There is nothing to download or install — just open the site, drop your FIT file, and start analyzing.
What file formats does Performance Analyzer support?
It supports FIT files (used by Garmin, Wahoo, and most modern cycling computers) and SRM files. Additional format support may be available — check the features page for the full list.
Is my data uploaded to a server?
Core analysis runs in the browser without cloud processing, keeping your data on your machine. If you create an account, files are stored with encryption so even the server cannot read your data.
How does the AI analysis feature work?
The built-in AI reads your ride's power data, zones, pacing, and metadata. You can type any question in plain English — like 'Was my pacing even?' or 'Did I show cardiac drift?' — and it returns an answer with generated charts.
Can coaches manage multiple athletes on one account?
Yes. The Coach Platform lets you add athletes, each with their own FTP, weight, and discipline settings. Athletes upload files via a dedicated link, and you receive email alerts. Per-athlete PMC charts and CP curves are tracked longitudinally.
