# HOTWORX vs sunaya studios

The clearest difference is ratings volume: HOTWORX at 31K against sunaya studios's 4. HOTWORX also leads on device support (3 vs 1). sunaya studios's advantage is rating (5.0 vs 4.8). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

sunaya studios holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: HOTWORX has 31K ratings behind it against 4, so its average is the more settled of the two.

HOTWORX ships an update fortnightly, sunaya studios every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HOTWORX | sunaya studios |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (31K ratings)](https://appshunter.io/ios/app/hotworx/id1182030612/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/sunaya-studios/id6796861591/reviews)** |
| Number of ratings | **31K** | 4 |
| Positive reviews | 8.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 200 MB | 38 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Planet Beach Franchising Corporation](https://appshunter.io/developer/1017284758) | [Living Pretty Clean, LLC](https://appshunter.io/developer/6796861593) |

## What reviewers say

### HOTWORX

[App page](https://appshunter.io/ios/app/hotworx/id1182030612)

Track your calorie burn and "after-burn" from 40-minute workouts and their subsequent 1-hour effects. This app integrates with your Health app to provide a comprehensive view of your session's total calorie expenditure over 100 minutes.

**Highlights:** Calorie burn tracking, 1-hour after-burn tracking, Total session calorie capture, Health app integration, Workout session monitoring

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🔥 Great workouts
- 🕰️ 24/7 accessibility
- 🧘‍♀️ Relaxing infrared sauna experience
- 🔥 Effective for fat loss and muscle toning
- 🧠 Positive mental health benefits

**What reviewers complain about**

- 🐛 Buggy and unreliable app
- 🤯 Complicated and frustrating app navigation
- 🔢 Too many steps to schedule a workout
- 🤖 Inaccurate calorie tracking and sync issues
- 🔍 Lack of app descriptions and class information

**Reported bugs**

- App crashes and freezes frequently
- Inability to record workouts and after-burn
- Inconsistent sync with Apple Watch and Fitbit
- Scheduled workouts disappearing from the app
- Incorrect calorie counting and data loss

**Requested features**

- Ability to book entire sauna room
- Seamless integration with fitness trackers
- Streamlined scheduling and booking process
- More detailed class descriptions in the app
- Automatic calorie tracking and recording


### sunaya studios

[App page](https://appshunter.io/ios/app/sunaya-studios/id6796861591)

Easily browse and purchase class packs or membership options. View the schedule, filter by class type, and book your reservations. Manage your upcoming classes to stay organized and committed to your fitness goals.

**Highlights:** Purchase class packs and memberships, Browse class schedule, Filter classes by type, Manage class reservations, Track upcoming classes

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is HOTWORX free?

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

### Is sunaya studios free?

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

### Which has better reviews, HOTWORX or sunaya studios?

sunaya studios is rated higher. HOTWORX averages 4.8 out of 5 from 31K ratings, while sunaya studios averages 5.0 from 4 ratings.

### Do HOTWORX or sunaya studios have ads?

Neither HOTWORX nor sunaya studios shows ads.

### Which is updated more often, HOTWORX or sunaya studios?

HOTWORX ships an update fortnightly, and sunaya studios every 3 weeks. Most recently, HOTWORX was updated on November 1, 2026 and sunaya studios on October 31, 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.*