Understand your own rhythm.

Rhythm is a private health and habit journal for men aged 18 and over. Log personal sessions on iPhone. After actively starting a session, optional Apple Watch motion and heart-rate data can provide personal rhythm summaries. Explore 7-, 30-, and 90-day trends, calendar records, and a 28-day personal baseline. Optional heart-rate, HRV, and resting-heart-rate readings support personal comparisons. Raw motion data is not stored. Private session records stay on your devices. No Rhythm account, ads, or third-party analytics SDK. An optional Game Center Arena rhythm game uses only game scores and your Game Center identity; it does not share private journals or health data. Rhythm does not diagnose or treat disease or assess sexual performance, cardiovascular health, or fertility. Consult a qualified medical professional for pain, distress, or habits that interfere with daily life. For adults 18+ only.