Projects

Calcpace — running log and analysis app: record activities, upload GPX routes, follow distance, pace, VO2max and age-grade trends, predict race times.
calcpace gem — Ruby library that powers the app: pace, time and distance math, unit conversion, race prediction, GPS track analysis, age grading, VO2max and training zones. 19k+ downloads on RubyGems.
Woche — Bash command-line tool for weekly tasks in Markdown files: add, edit, complete and search tasks, view any week grouped by day, with English or German day names.