Calmset

Built by a sports physiotherapist. Evidence-based rest timers with guided breathing between sets. Apple Watch, Live Activity, lock screen. No ads, no subscriptions.

Calmset gives you one thing and does it well: precise rest timing between sets, based on exercise science.

Rest periods matter. Too short and you leave strength on the table. Too long and you lose the metabolic stimulus. Calmset takes the guesswork out with evidence-based presets tuned to your training goal.

EVIDENCE-BASED PRESETS • Strength: 3–5 minutes — full phosphocreatine recovery • Hypertrophy: 60–90 seconds — optimal metabolic stress • Endurance: 30–45 seconds — sustained cardiovascular demand • Set your own duration with Pro

GUIDED BREATHING BETWEEN SETS • 8 structured breathing patterns during rest intervals • From quick activation to deep recovery • Each pattern grounded in peer-reviewed sports science • Visual breathing guide synced to your rest timer

WORKS WHERE YOU NEED IT • Background and lock screen — no need to keep the app open • Apple Watch companion with guided breathing • Live Activity and Dynamic Island support • Haptic and sound alerts when rest ends

MULTI-SET TRAINING • Queue sets and let the timer count them down • Auto-advance moves you through sets hands-free • Weekly Pulse — training summary with week-over-week trends • Session history to track rest patterns over time

DESIGNED FOR THE GYM FLOOR • Dark, minimal interface — reads clean between sets • No account required. No data collection. • No ads. No subscriptions. • 14 languages supported

CALMSET PRO — $4.99 LIFETIME One purchase. Yours forever. • Unlimited sets per session • Custom rest durations • Auto-advance between sets • Live Activity and Dynamic Island • Apple Watch companion • Full session history

Built by a sports physiotherapist with over a decade of clinical experience. Proper rest between sets is one of the simplest ways to improve your training — and most people get it wrong.