# City Zero Gym vs Project Burn Studio

The clearest difference is ads: City Zero Gym at none against Project Burn Studio's shown. City Zero Gym also leads on monetization model (free vs ad-supported). Project Burn Studio's advantage is ratings volume (62 vs 1). 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 City Zero Gym against 4.9 for Project Burn Studio. That said, the two scores are not equally well evidenced: Project Burn Studio has 62 ratings behind it against 1, so its average is the more settled of the two.

City Zero Gym ships an update every 18 months, Project Burn Studio every 16 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | City Zero Gym | Project Burn Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/city-zero-gym/id6447638334/reviews)** | [4.9 (62 ratings)](https://appshunter.io/ios/app/project-burn-studio/id6746137046/reviews) |
| Number of ratings | 1 | **62** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 18 months | **Every 16 months** |
| Monetization | **Free** | Ad-supported |
| Size | 32 MB | 38 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [City Zero LLC](https://appshunter.io/developer/1580453177) | [Hysterically Happy, LLC](https://appshunter.io/developer/1815353710) |

## What reviewers say

### City Zero Gym

[App page](https://appshunter.io/ios/app/city-zero-gym/id6447638334)

Easily book fitness classes, manage your membership, and stay updated on services. Make reservations, join waitlists, and purchase class packages directly from your device.

**Highlights:** Book classes, Manage reservations, Join waitlists, Purchase class packages, Check profile and membership, View latest products and services

**Features:** macOS Compatibility

**In-app purchases:** none


### Project Burn Studio

[App page](https://appshunter.io/ios/app/project-burn-studio/id6746137046)

Browse and book fitness classes, manage your schedule, and purchase class packs or memberships. Filter classes by type to find the perfect fit for your routine and stay committed to your fitness goals.

**Highlights:** Purchase class packs and memberships, Browse and filter class schedule, Manage class reservations, Track upcoming classes, Stay organized with fitness goals

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is City Zero Gym free?

City Zero Gym is free to download, with no in-app purchases.

### Is Project Burn Studio free?

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

### Which has better reviews, City Zero Gym or Project Burn Studio?

City Zero Gym is rated higher. City Zero Gym averages 5.0 out of 5 from 1 ratings, while Project Burn Studio averages 4.9 from 62 ratings.

### Do City Zero Gym or Project Burn Studio have ads?

Project Burn Studio shows ads; City Zero Gym does not.

### Which is updated more often, City Zero Gym or Project Burn Studio?

City Zero Gym ships an update every 18 months, and Project Burn Studio every 16 months. Most recently, City Zero Gym was updated on October 23, 2026 and Project Burn Studio on October 24, 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.*