# Purify U vs THREE15 STUDIO

The clearest difference is update cadence: THREE15 STUDIO at every 3 weeks against Purify U's every 3 months. THREE15 STUDIO also leads on ratings volume (51 vs 4). Purify U's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for Purify U against 5.0 for THREE15 STUDIO. That said, the two scores are not equally well evidenced: THREE15 STUDIO has 51 ratings behind it against 4, so its average is the more settled of the two.

Purify U ships an update every 3 months, THREE15 STUDIO every 3 weeks. The most recent releases landed on June 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Purify U | THREE15 STUDIO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/purify-u/id1415082541/reviews) | [5.0 (51 ratings)](https://appshunter.io/ios/app/three15-studio/id6477896937/reviews) |
| Number of ratings | 4 | **51** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Ad-supported | Ad-supported |
| Size | 151 MB | 36 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Everything Natural Under The Sun, Inc.](https://appshunter.io/developer/1415082540) | [THREE 15, LLC](https://appshunter.io/developer/1489994363) |

## What reviewers say

### Purify U

[App page](https://appshunter.io/ios/app/purify-u/id1415082541)

Easily plan and schedule your fitness classes directly from your mobile device. View class schedules, sign up for sessions, and find studio location information. Optimize your time and enjoy the convenience of managing your fitness activities on the go.

**Highlights:** View class schedules, Sign up for classes, Studio location information, Optimize time, Convenient mobile access

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### THREE15 STUDIO

[App page](https://appshunter.io/ios/app/three15-studio/id6477896937)

This app offers a variety of fitness classes combining cycling, barre, and strength training. Explore different class lengths and formats designed for all fitness levels, from beginner to advanced.

**Highlights:** Rhythm-based cycling, Barre workouts, Strength training, Full body stretching, Beginner-friendly classes, Extended and condensed class options

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Purify U free?

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

### Is THREE15 STUDIO free?

THREE15 STUDIO is free to download, with no in-app purchases.

### Which has better reviews, Purify U or THREE15 STUDIO?

Purify U and THREE15 STUDIO are both rated 5.0 out of 5 on the App Store, from 4 and 51 ratings respectively.

### Do Purify U or THREE15 STUDIO have ads?

Both Purify U and THREE15 STUDIO show ads.

### Which is updated more often, Purify U or THREE15 STUDIO?

Purify U ships an update every 3 months, and THREE15 STUDIO every 3 weeks. Most recently, Purify U was updated on June 23, 2026 and THREE15 STUDIO on September 8, 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.*