trace
Training analytics for ambitious cyclists and runners
What it does
Deep analysis of your training and health data, a plan that adapts to your everyday life, and an AI coach you can ask anything. What you used to need several apps and a coach for now sits in one app: trace
Training analysis for cycling and running: critical power, training load, readiness and training plans from your own data. Starter is free.
Founding Members · first 200 only Every day, the training that fits you now. For ambitious cyclists and runners: trace reads every session and your health data, adjusts your training plan to it, and explains every decision it makes. Readiness, form and your weekly plan at a glance – on desktop and on the go. Form +12 (fresh), today's plan fits. Give the intervals a clean warm-up. Your whole training in your pocket: readiness when you wake up, the plan before you head out, the debrief right after the session. The full analysis on your phone, not a stripped-down version. The training load curve the pros use, updated automatically every day. The training load curve the pros use, updated…from usetrace.de
Does the same job
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Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com