# SLT vs Heatwise Studio

SLT and Heatwise Studio both sit at 5.0 stars, but that hides the real split: 100% of Heatwise Studio's written reviews are positive against 71% of SLT's. SLT's advantage is monetization model (ad-supported vs free with in-app purchases) and ratings volume (3.3K vs 693). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for SLT against 5.0 for Heatwise Studio. Both are backed by a comparable volume of ratings — 3.3K and 693 respectively. Written reviews are what separate them: 71% of SLT's written reviews are positive against 100% of Heatwise Studio's.

Both ship on a similar rhythm, roughly every 4 weeks. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | SLT | Heatwise Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3.3K ratings)](https://appshunter.io/ios/app/slt/id1473159998/reviews) | [5.0 (693 ratings)](https://appshunter.io/ios/app/heatwise-studio/id1504908056/reviews) |
| Number of ratings | **3.3K** | 693 |
| Positive reviews | 71.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | Every 4 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 38 MB | 38 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mariana Tek Corporation](https://appshunter.io/developer/1178746980) | [Heatwise](https://appshunter.io/developer/1472501563) |

## What reviewers say

### SLT

[App page](https://appshunter.io/ios/app/slt/id1473159998)

Book and manage fitness classes directly from your phone. View studio schedules, purchase class packages, and access your account information. Stay connected with the studio through social media links.

**Highlights:** Book classes, View studio schedules, Purchase class packages, Manage account, View reservations, Find studio locations

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### Heatwise Studio

[App page](https://appshunter.io/ios/app/heatwise-studio/id1504908056)

Book your next sauna session with this app. Browse studio locations, view class schedules, and manage your reservations. Purchase classes and workshops, and update your account details all in one place.

**Highlights:** Find and book sauna sessions, View studio locations, Check class schedules, Review existing reservations, Purchase classes and workshops, Manage your account

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SLT free?

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

### Is Heatwise Studio free?

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

### Which has better reviews, SLT or Heatwise Studio?

SLT and Heatwise Studio are both rated 5.0 out of 5 on the App Store, from 3.3K and 693 ratings respectively.

### Do SLT or Heatwise Studio have ads?

Neither SLT nor Heatwise Studio shows ads.

### Which is updated more often, SLT or Heatwise Studio?

SLT ships an update every 4 weeks, and Heatwise Studio every 4 weeks. Most recently, SLT was updated on October 12, 2026 and Heatwise Studio on October 11, 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.*