# Perspire Sauna Studio 2.0 vs Project Function

The clearest difference is device support: Project Function at 4 against Perspire Sauna Studio 2.0's 2. 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.

Perspire Sauna Studio 2.0 ships an update every 2 months, Project Function every 6 weeks. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Perspire Sauna Studio 2.0 | Project Function |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (13K ratings)](https://appshunter.io/ios/app/perspire-sauna-studio-20/id1618076654/reviews)** | — |
| Number of ratings | **13K** | — |
| Positive reviews | 81.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 63 MB | 181 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Geisler Young](https://appshunter.io/developer/369530382) | [Project Function LLC](https://appshunter.io/developer/1790112444) |

## What reviewers say

### Perspire Sauna Studio 2.0

[App page](https://appshunter.io/ios/app/perspire-sauna-studio-20/id1618076654)

Easily plan and book your infrared sauna sessions on the go. View schedules, check for promotions, and access location and contact details all from your mobile device. Optimize your wellness routine with convenient appointment management.

**Highlights:** Schedule infrared sauna sessions, View appointment schedules, Book appointments, View ongoing promotions, Access location information, View contact information

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

**In-app purchases:** none

**What reviewers like**

- 👍 Friendly and helpful staff
- 🧹 Clean and well-maintained facilities
- 🧘‍♀️ Relaxing and rejuvenating experience
- 🕰️ Convenient scheduling and booking
- 🔍 Knowledgeable staff providing helpful information

**What reviewers complain about**

- 🔒 Privacy concerns with calendar access
- 🔧 Scheduling and booking issues

**Reported bugs**

- Calendar permission issues
- Inability to see room numbers during booking

**Requested features**

- Default studio selection option
- Ability to view session history and remaining sessions
- More comprehensive FAQ and support resources


### Project Function

[App page](https://appshunter.io/ios/app/project-function/id6740467390)

**Features:** Apple Wallet, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Perspire Sauna Studio 2.0 free?

Perspire Sauna Studio 2.0 is free to download, with no in-app purchases.

### Is Project Function free?

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

### Do Perspire Sauna Studio 2.0 or Project Function have ads?

Neither Perspire Sauna Studio 2.0 nor Project Function shows ads.

### Which is updated more often, Perspire Sauna Studio 2.0 or Project Function?

Perspire Sauna Studio 2.0 ships an update every 2 months, and Project Function every 6 weeks. Most recently, Perspire Sauna Studio 2.0 was updated on September 23, 2026 and Project Function on September 22, 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.*