Sweat Diary

Sweat Diary is a workout diary application designed for Mac and iPhone users who want to record and reflect on their sports experiences without the distractions of analytics or gamification. Rather than focusing on scores, streaks, or performance metrics, the app provides a space to document memories, feelings, and personal notes from each session across a wide variety of sports. Sweat Diary supports 61 disciplines, treating all activities equally and allowing users to log any form of movement, from running and surfing to yoga and climbing.

Key features include the ability to write journal entries about each workout, attach photos to capture moments, and use full-text search to revisit past experiences. The app emphasizes privacy and simplicity, requiring no account or subscription, and keeps all data on the user's devices. Workouts and notes sync automatically between Mac and iPhone via iCloud, with no setup or sign-in required. Users can also import workout data from HealthKit, ensuring compatibility with Apple Watch and other devices, with all data remaining private and on-device.

Sweat Diary is built as a native, fast, and distraction-free app, avoiding social feeds, loading spinners, and notifications. It includes a heatmap feature to visualize workout consistency over time, allowing users to see their activity at a glance. The process of logging a workout is streamlined—users select a sport, add a note or photo, and the entry is saved quickly.

The application is available for free, with no sign-up or subscription required. It requires macOS 15 Sequoia or later for Mac and iOS 18 or later for iPhone. Sweat Diary was created by Christoph Werner and is developed and supported in Munich. It is positioned as a personal diary for sports experiences, prioritizing memory and reflection over data analysis.