# Furolog — Onsen & Sauna Tracker

> Onsen & Sauna Tracker (iPhone/iPad app by Nimikko K.K..)

- Source: https://appshunter.io/ios/app/furolog/id6760871897 (this page in markdown: same URL + `.md`)
- Developer: [Nimikko K.K.](https://appshunter.io/developer/1886592870)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 95 MB
- Languages: American English, Japanese
- Released: 2026-04-03
- Data updated: 2026-07-23
- User reviews in markdown: https://appshunter.io/ios/app/furolog/id6760871897/reviews.md

## What is Furolog?

Furolog turns your Apple Watch into a bathing journal. Step into the water and it starts recording: temperature, heart rate, and every transition between soak, sauna, cold plunge, and rest.

 TRACKING 
 - Automatic water detection with temperature sampled every 5 seconds
 - Manual tracking supported with Apple Watch & iPhone
 - Continuous heart rate monitoring with smart alerts 
 - Activity timeline: soak → rest → sauna → cold plunge 
 - 13 spring types and 12 sauna types recognized
 
 DISCOVER
 - Find onsen, sento & sauna nearby on an interactive map 
 - Track your progress across all 47 prefectures of Japan 
 - Save favorites and see visit history per location 
 
 ANALYTICS (Furolog Pro) 
 - Temperature, duration & frequency trends 
 - Heart rate zones, recovery tracking & HR response 
 - Heat and cold tolerance scores 
 - Sauna HR climb profile & post-sauna recovery patterns
 - Your Perfect Session; data-driven recommendations
 
 PERSONALIZE
 - Share cards in three layouts with custom backgrounds 
 - 7 themes and 9 alternate app icons 
 - Fully localized in English and Japanese
 
====================================

Apple Watch use in hot water is at your own risk - Apple does not recommend submerging Apple Watch in hot springs or saunas. We are not responsible for any damage to your device. 
- HealthKit access is required for heart rate monitoring. 
- Location access is used for session mapping and nearby facility discovery.
- Community data sharing is optional and anonymous. It's used to show facility water temperatures and total visits.

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Furolog Pro | $2.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Furolog Pro Lifetime | $19.99 | one-time |



## Version history (last 3 releases)

### 1.2.7 — 2026-07-20

Fixed a rare crash and improved session viewing performance.

### 1.1.01 — 2026-04-08

- Redesigned session view with a fresh, cleaner look                                                                                                                            
 - Unified chart style across the app                                                                                                                                            
 - Swipeable daily and monthly stats                                                                                                                                             
 - Improved session editing with fewer interruptions                                                                                                                             
 - Watch tutorials and UI improvements                                                                                                                                        
 - Better phone-watch connectivity
 - Performance and stability fixes

### 1.0 — 2026-04-03

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-23.*