# Fitness in sauna — Optimal bathing by heartbeat

> Sauna bathing companion that monitors heart rate and alerts for optimal relaxation. (iPhone/iPad app by ryo munetsugu.)

- Source: https://appshunter.io/ios/app/fitness-in-sauna/id1588402263 (this page in markdown: same URL + `.md`)
- Developer: [ryo munetsugu](https://appshunter.io/developer/1588402265)
- Category: Health & Fitness, Lifestyle
- Price: $1.99
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 1 MB
- Languages: English
- Released: 2021-10-07
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/fitness-in-sauna/id1588402263/reviews.md

## What is Fitness in sauna?

【Overview】
Make your sauna bathing more comfortable.
It monitors your heart rate and vibrates to notify you of excess heart rate presets.
Since it is not necessary to manage the bathing time in detail and you can concentrate on the sauna, water bath, and outside air bath, you can expect an improvement in relaxation effect.

【App features】
・ Measure your heart rate every 1 second.
・Displays the heart rate visually.
・Vibrate to notify you when the upper / lower limit of your heart rate (which can be set arbitrarily) is exceeded.
・This application also supports execution in the background.

【 About fitness in sauna】
By repeating the sauna → water bath → outside air bath, “β-endorphin”, “oxytocin” and “serotonin” are secreted due to the warming and cooling effect.
This will give you a feeling of uplifting, well-being and stress relief.

【To do fitness in sauna】
Generally, you take a bath while measuring the bathing time of the sauna → water bath → outside air bath.
However, it is difficult to obtain a relaxing effect with this bathing method for the following reasons.
(1) The appropriate bathing time varies depending on the person / place, such as the temperature in the bathroom and the physical condition of the day.
(2) Too much awareness of bathing time management reduces the relaxing effect.

By using this app, (1) anyone can easily manage the bathing time based on the heart rate.
In addition, (2) it notifies you of the excess of the preset heart rate, so bathing time management is stress-free and you can concentrate on relaxing your mind and body.

【Points to note】
This app integrates with the health app (HealthKit) to measure your heart rate.

## Key features

- Heart rate monitoring every second
- Visual heart rate display
- Vibration alerts for heart rate limits
- Background execution support
- HealthKit integration for heart rate data

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/fitness-in-sauna/id1588402263/reviews.md

### 1/5 — Do not buy this app!

*2022-05-13*

I bought the Japanese version and then it redirected me buy the English version which I did and nothing happened. I want my money back.

## Frequently asked questions about Fitness in sauna

### What is Fitness in Sauna?

Fitness in Sauna is a health and fitness application designed to enhance your sauna bathing experience. It monitors your heart rate and provides vibration alerts when your heart rate exceeds preset limits, helping you relax more effectively.

### How does Fitness in Sauna monitor heart rate?

Fitness in Sauna integrates with the HealthKit app to measure your heart rate every second. This data is then displayed visually within the application.

### Can I customize the heart rate alerts in Fitness in Sauna?

Yes, you can set arbitrary upper and lower limits for your heart rate. The app will vibrate to notify you when these preset limits are exceeded.

### Does Fitness in Sauna work in the background?

Yes, this application supports execution in the background, allowing you to focus on your sauna, water bath, and outdoor air bath without interruption.

### What devices does Fitness in Sauna support?

Fitness in Sauna is available for iPhone, iPod, and Apple Watch devices.

### How much does Fitness in Sauna cost?

Fitness in Sauna is a paid application, priced at $1.99.

### When was Fitness in Sauna last updated?

The latest version of Fitness in Sauna, version 2.2, was last updated on August 25, 2022.

### What is the age rating for Fitness in Sauna?

Fitness in Sauna has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 2.2 — 2022-08-25

Minor fixes

### 2.1 — 2022-08-10

Fixed a bug that settings are not reflected

### 2.0 — 2022-05-10

・ Change app name
・ Other minor fixes

### 1.2 — 2022-04-15

Implemented a correction to expand the range of heart rate settings.

### 1.1 — 2021-10-29

・軽微なバグ修正
・多言語対応

## Apps similar to Fitness in sauna

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| --- | --- | --- | --- |
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| [Hear my Heart Beat Monitor App](https://appshunter.io/ios/app/hear-my-heart-beat-monitor-app/id1578478618) | 4.6 (233) | Free | Health & Fitness |
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## More apps by ryo munetsugu

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- [HeatstrokeDetection](https://appshunter.io/ios/app/heatstrokedetection/id1643092212)
- [TimeWithChildren](https://appshunter.io/ios/app/timewithchildren/id1663623291)

All apps by ryo munetsugu: https://appshunter.io/developer/1588402265

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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 2026-06-10.*