Move at your own pace.
A workout intensity guide for everyday exercise. Set targets, follow clear guidance on your wrist, and understand each workout.
v1.0 · Preparing for release
Start with your baseline
Set personal heart-rate reference targets. Use available sleep records and subjective fatigue for conservative daily guidance.
Understand your intensity
Record on Apple Watch, follow sustained intensity alerts, and configure heart-rate, time, pace, or distance conditions.
Review your activity
Review splits, trends and workout highlights on iPhone, create a share card, and track weekly activity time.
A complete intensity guide, from before to after your workout.
On-wrist guidance
Apple Watch records and alerts on sustained off-target effort, with pause, resume and water lock.
Personal heart-rate target
Built from your age, resting and optional max heart rate; manual targets when data is unavailable.
Combined alert rules
Up to 12 rules, 1–4 conditions each, combining heart rate, time, distance and pace.
Splits, trends & weekly goals
Distance splits, sport-specific trends, sleep guidance and weekly goals help you find your pace.
Workout highlights
Adjustment and steady segments recognized from real records, with traceable evidence — sequence, not cause.
Share cards
Deep-purple or lilac theme, a short note, and a 1080×1440 PNG to share; heart rate hidden by default.
Ten interface languages. Data stays on your devices — no account, ads, or third-party analytics.
Dark, glanceable intensity at a glance.
Previews use sample data; the shipping app reflects your device.
Health records stay on your devices.
No account, ads, or third-party analytics SDKs. Records stay on your devices and paired devices. This website does not accept health records.
PaceGuard is not for medical diagnosis or emergency monitoring. Underwater heart rate, haptics, and some metrics may be unavailable. Swimming supports pools only.