Unpaywalled analytics
TSS · NP · IF · VI · kJ · peak power curves · HR zones · GAP · decoupling · TRIMP · rTSS. Coggan and Banister models, implemented honestly.
Strava analytics. TrainingPeaks PMC. Free.
Connect Garmin or Strava, import your whole history, and pacelore computes the metrics that matter: TSS, NP, IF, peak power curves, GAP, decoupling, and CTL/ATL/TSB. Your data, your archive. Free forever — no caps, no paywall, no upsell.
Connect Strava in under a minute · No credit card · Self-host on Cloudflare in under 10 minutes
Side by side
Premium tiers compared as of May 2026. Pricing taken from each platform's public site.
| Feature | Strava Premium | TrainingPeaks Premium | pacelore |
|---|---|---|---|
| Annual price | ~$80 / yr | $240 / yr | $0 |
| TSS · NP · IF | partial | yes | yes |
| Peak power curve (mean-max) | premium-gated | yes | yes |
| PMC · CTL / ATL / TSB | — | yes (Banister model) | yes (Banister model) |
| Time in zone | premium-gated | yes | yes |
| GAP · grade-adjusted pace | premium-gated | yes | yes (Minetti model) |
| Segments + leaderboards | yes | — | yes |
| Social feed · kudos · comments | yes | — | yes |
| Free FIT / TCX / GPX export | per-activity only | yes | yes (raw + parsed) |
| Open public API | throttled, app-keyed | partial | REST + MCP, free |
| Source available | — | — | yes |
| Self-hosting | — | — | 10-minute Cloudflare deploy |
"Strava", "TrainingPeaks", "Garmin Connect" are trademarks of their respective owners. pacelore is not affiliated with any of them.
Migration
Bring your whole Strava history in 90 seconds
Click Connect Strava, authorize, hit Backfill all. pacelore walks the whole archive back to your account creation, throttled inside Strava's rate limits, deduped against itself. Long histories continue overnight via cron — no tab to keep open.
- ✓ TCX synthesized from
/activities+/streams— full HR / power / pace / cadence - ✓ Re-import safe —
(strava, activity_id)dedup - ✓ Pulls Zwift rides synced to Strava automatically
- ✓ Activities populate PMC + zone analysis as they land
What you get
PMC dashboard
42-day CTL · 7-day ATL · daily TSB. The same model TrainingPeaks invented, with a calendar heatmap and zone ramp legend.
Data sovereignty
Free FIT / TCX / GPX export. Optional Arweave permanence backup. Optional ATProto export to your own PDS. Your activities, your archive, no lock-in.
Workout library
60 calibrated sessions across cycling, running, swimming. Filter by sport, duration, and intensity zone. Export to FIT for Garmin or .zwo for Zwift.
Social, but quiet
Follow graph, kudos, threaded comments, segments with leaderboards, clubs, events. Public / followers / private — your call, per activity.
Source-available
PolyForm Noncommercial 1.0.0. Self-host on your own Cloudflare account in under 10 minutes. Nothing important behind a paywall.
free tier $0 all core analytics, forever
export FIT · TCX · GPX your data, anytime
infra edge · cloudflare global, autoscaling
license PolyForm noncommercial 1.0.0
From the blog
All posts → Dec 2025
Normalized Power in 20 lines of TypeScript
The 4th-power moving average that makes sense of variable-effort rides.
Jan 2026TSS three ways: power, heart rate, pace
Power TSS, hrTSS, and rTSS — the same idea computed three different ways.
Jan 2026Running pacelore: $0.012 per athlete per month
A line-by-line breakdown of the Cloudflare bill and how the math works at scale.
Mar 2026Segment matching with Dynamic Time Warping
How pacelore finds your effort on a segment even when GPS lines don't overlap perfectly.
Apr 2026Why PolyForm Noncommercial over MIT
The license choice that lets anyone self-host pacelore but blocks commercial wrappers.
May 2026Six months of pacelore
What we shipped, what we learned, and where the project stands.
Questions
Is pacelore really free for athletes?
Yes. Every analytics feature on this page — TSS, NP, IF, peak power curves, GAP, decoupling, CTL/ATL/TSB, calendar, segments — is available on the free tier with no caps. No paywall on metrics, ever. Source-available under PolyForm Noncommercial 1.0.0.
How does this compare to Strava Premium?
Strava Premium charges roughly $80/year and still gates time-in-zone, segment effort history, and the matched runs comparison. pacelore gives you the same numbers — plus power-based TSS, NP, IF, peak power curves, and a real PMC dashboard — at zero cost.
How does this compare to TrainingPeaks Premium?
TrainingPeaks Premium is $240/year and is the canonical home of the PMC chart. pacelore implements the same Banister CTL/ATL/TSB model with daily TSS rollup, plus zone analysis and peak power curves. The model is the same; the price is not.
Can I import my whole Strava history?
Yes. Connect Strava in /upload and click "Backfill all". pacelore walks the Strava activity list back to your account creation, respects the 100 req / 15 min and 1000 / day limits, and dedups against itself so you can re-run it safely. Long histories continue overnight via cron.
What about Garmin?
OAuth1.0a connect + push webhooks for activities, plus daily summaries, sleep, body composition, and user metrics (VO2max, RHR, HRV) — wired and waiting on Garmin Health/Activity API partner approval, which is a per-company application.
Is my data really portable?
Yes. Every activity is stored as the original FIT/TCX/GPX in R2 and re-exportable from the dashboard. Optional Arweave permanence backup. Optional ATProto export to your own PDS. No lock-in.
What happens if you stop maintaining pacelore?
The full source is on GitHub under PolyForm Noncommercial 1.0.0. The whole stack runs on Cloudflare. Anyone can fork the repo, deploy to their own Cloudflare account in under ten minutes, and keep their data flowing. The license blocks commercial reuse but explicitly permits self-hosting.
Where's the mobile app?
Web is the primary surface today and works on phones. Native iOS app with HealthKit integration is on the roadmap; Garmin Connect / Strava push webhooks already cover most of what a "record an activity" app would do. Calendar + dashboard are read-only on mobile.
Why "noncommercial"?
PolyForm Noncommercial 1.0.0 keeps the source readable, runnable, and self-hostable by anyone — but blocks resale and commercial wrappers. The point is to keep pacelore from being acquired and turned into the next thing it's replacing. Personal, hobby, research, and nonprofit use are explicitly allowed.
How is this so cheap to run?
The whole stack — Workers, D1, R2, KV, Queues, Email — sits on Cloudflare's edge. Autoscales to zero. Per-athlete infra cost is around $0.012/month at 10k active users. Detailed cost breakdown lives in ARCHITECTURE.md.
Stop renting your training data.
One account. Free forever. Connect Garmin or Strava and get every metric on this page in the next two minutes.