# X4 FIT vs THREE15 STUDIO

The clearest difference is ads: X4 FIT at none against THREE15 STUDIO's shown. X4 FIT also leads on ratings volume (215 vs 51). THREE15 STUDIO's advantage is monetization model (ad-supported vs free with in-app purchases). On price, rating, update cadence 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 X4 FIT against 5.0 for THREE15 STUDIO. Both are backed by a comparable volume of ratings — 215 and 51 respectively.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 1, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | X4 FIT | THREE15 STUDIO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (215 ratings)](https://appshunter.io/ios/app/x4-fit/id6446330509/reviews) | [5.0 (51 ratings)](https://appshunter.io/ios/app/three15-studio/id6477896937/reviews) |
| Number of ratings | **215** | 51 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 38 MB | 36 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [X⁴, LLC](https://appshunter.io/developer/1535353521) | [THREE 15, LLC](https://appshunter.io/developer/1489994363) |

## What reviewers say

### X4 FIT

[App page](https://appshunter.io/ios/app/x4-fit/id6446330509)

This app facilitates booking and managing fitness classes at a boutique gym. It offers efficient, full-body functional workouts with on-screen demos and varied routines. Members can easily register, book classes, and purchase memberships or retail items.

**Highlights:** Coach-led group fitness classes, 50-minute full-body workouts, On-screen exercise demos, Constantly changing routines, Class booking for members, Membership and retail purchasing

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

**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 X4 FIT free?

X4 FIT 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, X4 FIT or THREE15 STUDIO?

X4 FIT and THREE15 STUDIO are both rated 5.0 out of 5 on the App Store, from 215 and 51 ratings respectively.

### Do X4 FIT or THREE15 STUDIO have ads?

THREE15 STUDIO shows ads; X4 FIT does not.

### Which is updated more often, X4 FIT or THREE15 STUDIO?

X4 FIT ships an update every 3 weeks, and THREE15 STUDIO every 3 weeks. Most recently, X4 FIT was updated on September 1, 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.*