Furolog vs SaunaFlow

Turn every soak into a story you can learn from. Furolog is a bathing journal for onsen, sento, sauna and cold-plunge fans. With a compatible Apple Watch, it detects when you enter the water and records temperature and heart rate, building a timeline of every soak, rest, sauna and cold plunge. Prefer to stay in control? Record manually from Apple Watch or iPhone. Sensor-based water temperature tracking is available on Apple Watch Series 10 or later and Apple Watch Ultra models. TRACK AS YOU BATHE • Automatic water detection on compatible Apple Watch models • Water temperature changes recorded as often as every 5 seconds • Continuous heart rate monitoring with configurable alerts • Manual dip, sauna and temperature controls on Apple Watch and iPhone • A clear activity timeline for every soak, rest, sauna and cold plunge • Tag sessions with 13 onsen water types and 12 sauna types REMEMBER EVERY VISIT • Add ratings, notes and photos to your sessions • Save favorite sessions and facilities • See your complete visit history for each location • Keep your journal in sync across devices with iCloud DISCOVER YOUR NEXT STOP • Find nearby onsen, sento and sauna on an interactive map • Track the prefectures you have visited and aim for all 47 • See community water temperatures and visit totals when available UNDERSTAND YOUR PATTERNS — FUROLOG PRO • Explore temperature, duration and frequency trends • Review heart rate zones, HR response and post-session recovery • Follow heat tolerance, cold tolerance and hot-cold contrast • See your sauna heart rate climb and recovery pattern • Find Your Perfect Session from the routines you rate highest MAKE IT YOURS • Create share cards in three layouts with customizable gradient backgrounds • Add photo backgrounds and choose from 9 alternate app icons with Furolog Pro • Choose from 7 themes • Use Furolog in English or Japanese All recording features on Apple Watch and iPhone are free. Furolog Pro unlocks advanced analytics and additional customization. PRIVACY AND PERMISSIONS Community sharing is optional and can be disabled globally or for individual sessions. Shared records are anonymized and used to provide facility water temperatures and visit totals. Notes, photos, heart rate data, exact timestamps, home addresses and precise locations are never shared. HealthKit access is required to record heart rate. Location access is used for session mapping and nearby facility discovery. Heart rate alerts are informational and are not medical guidance. IMPORTANT Use of Apple Watch in hot water is at your own risk. Apple does not recommend submerging Apple Watch in hot springs or using it in saunas. We are not responsible for damage to your device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.nimikko.co.jp/en/furolog-privacy-policy

No need to watch the clock. Apple Watch automatically guides you through sauna>cold plunge>rest right on your wrist. Build routines on iPhone, run them on your Watch, and refine your flow with every session. ◆ Start instantly with built-in presets Choose from classic presets like 60-min standard, quick single round, or short cold plunge. Changes made on iPhone sync automatically to Apple Watch. ◆ Complete sessions from Apple Watch No need for your smartphone inside the sauna. Phase transitions are notified by haptic feedback, and you can check time remaining and the next phase on your wrist. Use the Digital Crown to skip or add 30 seconds to the current phase; pause has its own on-screen button. ◆ Build your personal routine from history History shows completion rate, best session, notes, and score trends. Re-run great sessions or save them as new presets. ◆ Designed for consistent use Favorite and recommended presets are easy to find on Watch. This isn't just a one-off timer — it's built for repeated use. ◆ Heart rate from Apple Watch Your Watch records heart rate through the whole session and charts the climb in the sauna and the drop during the cold plunge and rest. The deeper the recovery, the higher your Session Score. Each session is saved to Health as a workout. ◆ Streaks, badges and place logging A weekly streak, badges at 10, 50 and 100 sessions and a monthly summary show how consistently you go. Log the venue name, sauna, cold plunge and outdoor temperature, and whether there was löyly. Add days you didn't wear the Watch by hand. You can also start with Siri. ◆ Backup, editing and deleting Save every preset and session to a single file and restore it on your new phone. Edit any session's start time and rounds, or delete it, so one wrong entry doesn't skew your stats forever. ◆ Premium (one-time purchase) Try it free, buy once if you need more. No subscription. [Free] · Up to 5 presets · Your latest 10 sessions in History · Score, notes, streak and backup [Premium] · Unlimited presets · Unlimited history and comparison · Watch display/haptic customization · Re-run and save sessions from history ◆ Safety Notice Displayed times are guidelines. In high-heat environments, always prioritize your health and stop immediately if you feel unwell. ◆ Requirements · iPhone: iOS 17 or later · Apple Watch: watchOS 10 or later · All data stored on-device. No personal data collected or sent to external servers.