# Heat Ready — Heat acclimatization tracker

> Heat acclimatization tracker (iPhone/iPad app by TOSHINAO KAMIKUBO.)

- Source: https://appshunter.io/ios/app/heat-ready/id6770392059 (this page in markdown: same URL + `.md`)
- Developer: [TOSHINAO KAMIKUBO](https://appshunter.io/developer/1876379379)
- Category: Sports, Health & Fitness
- Price: Free with in-app purchases (on sale, was $3.99)
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, European Spanish
- Released: 2026-05-30
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/heat-ready/id6770392059/reviews.md

## What is Heat Ready?

HeatReady helps athletes prepare for training and competition in hot environments by tracking heat acclimatization with science-based methods.

Using heart rate from your Apple Watch, HeatReady estimates your physiological strain during heat training and guides you through a structured acclimatization plan.

KEY FEATURES

Heat strain monitoring
Live monitoring of your physiological strain during heat training sessions, with an estimated core temperature derived from heart rate using a Kalman-filter model.

14-day acclimatization protocol
A structured day-by-day heat acclimatization plan tailored to your profile, so you know exactly what to do each day.

Acclimatization status
Track how acclimatized you are with clear, evidence-based indicators, and see when your adaptation begins to fade.

Decay tracking
Heat adaptation fades when you stop training in the heat. HeatReady estimates this decay so you can time your final preparation before competition.

Session history
Review every heat session with detailed trends and metrics.

Apple Watch companion
Start and monitor heat sessions directly from your wrist.

DESIGNED FOR ATHLETES
Whether you compete in track and field, endurance running, cycling, or team sports, HeatReady helps you arrive at the start line prepared for the heat.

HEATREADY PRO
HeatReady is free to download. The 14-day protocol, live monitoring, Apple Watch session tracking, decay analytics, and session history require a HeatReady Pro subscription (monthly or yearly), with a 7-day free trial on the yearly plan. Payment is charged to your Apple Account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store settings.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://athlivia26.com/privacy.html

IMPORTANT
HeatReady provides estimates for training guidance only. It is not a medical device and does not measure core body temperature directly. It does not diagnose, prevent, or treat any illness, including heat-related illness. Always listen to your body, follow qualified guidance, and stop activity if you feel unwell.

All your data stays on your device.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Yearly | $29.99 | per year |



## Version history (last 2 releases)

### 1.1 — 2026-06-13

- HeatReady Pro: the app is now free to download, with a 7-day free trial on the yearly plan
- New languages: German, French, Spanish, and Italian
- Early supporters who purchased HeatReady keep full access - thank you

### 1.0 — 2026-05-31

No release notes.

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## More apps by TOSHINAO KAMIKUBO

- [OptiRun BASE+](https://appshunter.io/ios/app/optirun-base-plus/id6760121567)
- [PACE Lab+](https://appshunter.io/ios/app/pace-lab-plus/id6760603509)
- [SprintPeak](https://appshunter.io/ios/app/sprintpeak/id6760764626)
- [WarmPulse](https://appshunter.io/ios/app/warmpulse/id6760960199)
- [ATHLIVIA-One](https://appshunter.io/ios/app/athlivia-one/id6767551112)

All apps by TOSHINAO KAMIKUBO: https://appshunter.io/developer/1876379379

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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 2026-08-24.*