# HeatLab: Hot Workout Tracker — Session Log, Trends & Insights

> Specialized heated workout tracker with heart rate analysis and heat adaptation insights. (iPhone/iPad app by Casey MacPhee.)

- Source: https://appshunter.io/ios/app/heatlab-hot-workout-tracker/id6758251294 (this page in markdown: same URL + `.md`)
- Developer: [Casey MacPhee](https://appshunter.io/developer/1871752828)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.2 · 11 MB
- Languages: English
- Released: 2026-05-19
- Data updated: 2026-10-02
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/heatlab-hot-workout-tracker/id6758251294/reviews.md

## What is HeatLab?

HeatLab is the heart rate and heat training app made for hot yoga, hot pilates, sculpt, and every heated workout in between. Track each class with your Apple Watch, then watch your body adapt to the heat over weeks and months.

Generic fitness apps don't understand heated training. A 145 bpm average means something different at 105°F than at room temperature, and a basic "calories burned" stat tells you nothing about how your body is acclimating. HeatLab is built specifically for the heated workout community.

TRACK WHAT MATTERS

Tap to start on your Apple Watch - Vinyasa, Pilates, Sculpt, Bikram, Barre, or any custom class. Live heart rate, elapsed time, a rolling HR chart, and an ambient "Zen" visualization keep you focused mid-session.

After class, capture the room temperature and your perceived effort. Workouts sync automatically to Apple Health and HeatLab on iOS.

UNDERSTAND YOUR HEAT FITNESS

• Heat Fitness Score - a composite score that builds with each heated session and reflects your real adaptation
• Resting HR delta - proof the heat is working, tracked from your first heated session forward
• Baseline comparisons - every session benchmarked against your personal baseline for that temperature
• Zone analysis - time-weighted breakdown across HR zones 1–5, per session and per temperature bucket
• Personal records - highest max HR, longest time in zone 4+, and more, by class type and overall
• Trend charts and period-over-period comparisons by week, month, or year

AI INSIGHTS, ON YOUR DEVICE

HeatLab uses Apple Intelligence to generate session summaries and trend insights - all on-device. Your data never leaves your iPhone. On devices without Apple Intelligence, a powerful analysis backend drives the insights.

BUILT FOR APPLE WATCH

HealthKit-native workout sessions, dual-path background sync, always-on display, and device lock for sweaty sessions. Sessions arrive on your iPhone the moment you're back in range.

DESIGNED FOR THE STUDIO

• Filter by class type, temperature bucket, or date range
• Edit class type, temperature, notes, or duration after the fact
• Streaks, week-over-week comparisons, and weekly zone distribution
• Smart claim flow for workouts you forgot to record on your Watch
• Custom class types - add Hot HIIT, Heated Strength, or whatever you practice

HEATLAB PRO

Free tier includes core tracking, sync, and the past 7 days of history. Pro unlocks:
• Unlimited session history
• Apple Intelligence session summaries and AI insights
• Heat Fitness Score and resting HR trend
• Zone analysis and personal records
• Full period-over-period comparisons

Available as a monthly or annual subscription. Restore purchases anytime.

PRIVACY

Your health data stays on your device. AI runs locally through Apple Intelligence - your sessions, heart rate, and notes are never sent to a server.

Built by a small team that practices what we ship. Questions? Email support@heatlab.app - we read every message.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Track heated workouts (hot yoga, pilates, sculpt)
- Apple Watch integration for live heart rate
- Heat Fitness Score and resting HR delta
- Zone analysis and personal records
- On-device AI insights and session summaries
- Unlimited session history (Pro)
- Custom class types

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| HeatLab Pro Monthly | $4.99 | per month |
| HeatLab Pro Annual | $39.99 | per year |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/heatlab-hot-workout-tracker/id6758251294/reviews.md

### 5/5 — finally analysis that integrates HEAT in class

*2026-06-07*

to start, the apple watch app is SO much more pleasant than the “yoga” workout. the timer is less aggressive… because why do i need milliseconds in yoga? the colors are pleasant, and i barely notice the activity screens unless i intentionally look at my watch. i love seeing my heart rate drop in the graph when i take a child’s pose rest. most of all, i love the zen screen! aligning the waves with my HR is so unique and possibly the best screen when you’re trying to drop in and check your data later. 

the phone app is also superior. very useful to filter the data by temperature, class type, or both. the AI integration is also an interesting spin on data analysis apps... i admit, it is addictive to watch my heat adaption improve with my Heat Fitness Score. 

lastly, the app is secure!!? my HR data isn’t shared with any outside party and the analysis is exclusive to my phone. phenomenal.

## Frequently asked questions about HeatLab

### Does HeatLab have ads?

No, HeatLab is ad-free. As a freemium application, it offers core tracking features for free and unlocks additional benefits through a paid subscription.

### What devices does HeatLab support?

HeatLab is designed for Apple devices, specifically supporting the iPhone and Apple Watch. Workouts sync automatically between the two.

### How does HeatLab track my progress in heated workouts?

HeatLab tracks your heart rate during sessions and analyzes how your body adapts to heat over time. It provides metrics like a Heat Fitness Score and resting HR delta to show your acclimation.

### What are the benefits of HeatLab Pro?

HeatLab Pro unlocks unlimited session history, on-device AI insights and session summaries, the Heat Fitness Score and resting HR trend, detailed zone analysis, personal records, and full period-over-period comparisons.

### How often is HeatLab updated?

The latest version of HeatLab is 1.8, which was last updated on June 27, 2026. This indicates a commitment to regular updates and improvements.

### Is HeatLab suitable for all ages?

HeatLab has an age rating of 4+, making it suitable for a wide range of users. Its focus on health and fitness tracking is appropriate for individuals engaging in these activities.

### Can I edit my workout details after a session?

Yes, HeatLab allows you to edit class type, temperature, notes, or duration after a session has been recorded. This ensures your data remains accurate even if you forget to set it up perfectly beforehand.

### How does HeatLab ensure my data privacy?

HeatLab prioritizes privacy by keeping your health data on your device. AI analysis runs locally through Apple Intelligence, meaning your sessions, heart rate, and notes are never sent to a server.

## Version history (last 4 releases)

### 1.9 — 2026-07-02

Bugfixes

### 1.8 — 2026-06-27

- Expanded Apple workout type sources
- App store review prompt

### 1.7 — 2026-05-25

- Adds promo code support
- Fix homepage load

### 1.6 — 2026-05-20

No release notes.

## Apps similar to HeatLab

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Wile Hearts Yoga LLC](https://appshunter.io/ios/app/wile-hearts-yoga-llc/id6776012218) | — | Free | Health & Fitness |
| [The Sweat Room](https://appshunter.io/ios/app/the-sweat-room/id6758962120) | 5.0 (1) | Free | Health & Fitness |
| [GATHER YOGA STUDIO](https://appshunter.io/ios/app/gather-yoga-studio/id6761184511) | 5.0 (1) | Free | Health & Fitness |
| [Cape Coral Yoga Pilates](https://appshunter.io/ios/app/cape-coral-yoga-pilates/id6741593742) | — | Free | Health & Fitness |
| [Neuday](https://appshunter.io/ios/app/neuday/id6758766114) | 4.6 (14) | Free | Health & Fitness |
| [The Heat Lab](https://appshunter.io/ios/app/the-heat-lab/id6748411312) | — | Free | Health & Fitness |

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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 2026-10-02.*