Endurance Debrief

Analyze your rides, runs and swims right on your iPhone or iPad: TSS, fitness & form curve, coach feedback — 100% private, no subscription, no account.

Endurance Debrief answers two questions after every workout: Was that session any good? And how fit am I right now?

Import your rides, runs and swims as FIT, TCX or GPX files — or automatically from Apple Health — and get the analysis usually reserved for big training platforms. Entirely on your iPhone. No account, no subscription, no cloud.

YOUR WORKOUT, HONESTLY ANALYZED • Training Stress Score (TSS) — from power, pace or heart rate, depending on your data • Normalized Power, Intensity Factor and aerobic decoupling • Zone distribution: power, pace or heart-rate zones • Coach feedback in plain sentences: what your numbers mean — generated fully on device

YOUR FITNESS AT A GLANCE • Form curve based on the proven CTL/ATL/TSB model: fitness, fatigue, form • Today view with a simple status: build, recover, or race-ready • Weekly summary: sessions, TSS and fitness trend for the current week • Home Screen widget with today's form • History as a list or calendar, filtered by sport • VO₂max trend estimated from your workouts

100% PRIVATE • All calculations run locally on your iPhone • No cloud, no account, no ads, no tracking • Privacy label: "Data Not Collected"

FOR CYCLISTS, RUNNERS AND SWIMMERS • FIT, TCX and GPX files from bike computers and sports watches • Apple Health import for workouts recorded with Apple Watch • Manual entries for sessions without a file — your form curve stays complete • Profile with FTP, threshold pace, LTHR and heart-rate zones • Fully localized in English and German • Lock Screen widget: your form at a glance, without opening the app • Siri and Shortcuts: "What is my form" gets answered right away

Download once, done. No subscription.

Note: VO₂max and form values are training estimates, not medical statements.