Kosoku is the performance lab where coaches build programs and athletes execute them — a precision web platform for the desk, a focused app for the floor. One system, from plan to PR.
Coaches plan, assign and monitor from a full-bleed web workspace. Athletes receive, log and recover on a phone built for the gym floor. Every set syncs back instantly.
Build exercises, workouts and periodized programs. Assign to squads, watch readiness, catch the athlete who's slipping before they break.
Explore the coach platform →Today's session, locked and ready. Log sets at the rack, hit the rest timer, watch your tonnage climb. Free, forever, with or without a coach.
Explore the athlete app →A shared, video-backed library with movement patterns, muscle groups and equipment — searchable in a keystroke.
Periodize across weeks and days. Drag to copy, configure progressive overload, template anything that works.
Athletes log weight, reps and RPE at the rack with a built-in rest timer and heart-rate readout.
Group athletes into squads, assign programs in bulk, and track attendance for every session.
Plan practices and events on a shared calendar. Athletes see today's session the moment they wake up.
Tonnage trends, top-lift PRs and readiness flags surface the athlete who needs attention first.
Build programs, assign to athletes, and monitor every roster from one precise workspace.
For coaches →Get today's session, log every set, and watch your numbers climb. Free, with or without a coach.
For athletes →Multiple coaches, squad management, attendance and shared resources for clubs and academies.
For teams →Athletes train free, forever. Coaches pay for the workspace and pricing scales with active athletes — never with feature locks.
See full pricing →Open the web app in your browser today. The iOS and Android apps land soon — get on the list and we'll tell you the moment they're live.