# HeatLab vs Skinstep

The clearest difference is in-app purchases: Skinstep at none against HeatLab's 2. Skinstep also leads on update cadence (daily vs every 5 days) and iOS requirement (15.1 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. HeatLab sells 2 in-app purchases, starting at $4.99 per month. Skinstep asks for nothing beyond the download.

HeatLab ships an update every 5 days, Skinstep daily. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | HeatLab | Skinstep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/heatlab-hot-workout-tracker/id6758251294/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Monetization | Freemium | — |
| Size | 11 MB | 30 MB |
| Requires iOS | 26.2 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Casey MacPhee](https://appshunter.io/developer/1871752828) | [ARSHYA CHOPRA](https://appshunter.io/developer/1891246703) |

## What reviewers say

### HeatLab

[App page](https://appshunter.io/ios/app/heatlab-hot-workout-tracker/id6758251294)

Track your heated workouts like hot yoga and pilates with this specialized app. It analyzes your heart rate and body's adaptation to heat, providing insights beyond generic fitness trackers. Monitor trends and understand your progress in extreme temperature environments.

**Highlights:** 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

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HeatLab Pro Monthly | $4.99 | per month |
| HeatLab Pro Annual | $39.99 | per year |


### Skinstep

[App page](https://appshunter.io/ios/app/skinstep/id6761745854)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HeatLab free?

HeatLab is free to download, with in-app purchases available.

### Is Skinstep free?

Skinstep is free to download, with no in-app purchases.

### Do HeatLab or Skinstep have ads?

Neither HeatLab nor Skinstep shows ads.

### Which is updated more often, HeatLab or Skinstep?

HeatLab ships an update every 5 days, and Skinstep daily. Most recently, HeatLab was updated on November 5, 2026 and Skinstep on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*