# TREMBLE Studios vs Harbor Pilates

The clearest difference is update cadence: TREMBLE Studios at monthly against Harbor Pilates's every 3 months. Harbor Pilates's advantage is iOS requirement (11.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

TREMBLE Studios ships an update monthly, Harbor Pilates every 3 months. The most recent releases landed on September 22, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | TREMBLE Studios | Harbor Pilates |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2.1K ratings)](https://appshunter.io/ios/app/tremble-studios/id1524078282/reviews)** | — |
| Number of ratings | **2.1K** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 38 MB | 16 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Coral Tremble Gables LLC](https://appshunter.io/developer/1524078284) | [Apex Global Solutions Inc](https://appshunter.io/developer/903321221) |

## What reviewers say

### TREMBLE Studios

[App page](https://appshunter.io/ios/app/tremble-studios/id1524078282)

Book reformer Pilates classes with your favorite instructors and reserve your machine spots. Manage your account, billing, and view scheduled classes all in one place. Discover South Florida's premier reformer Pilates brand.

**Highlights:** Find instructors and locations, Book reformer Pilates classes, Reserve machine spots, View scheduled classes, Manage account and billing

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

**In-app purchases:** none


### Harbor Pilates

[App page](https://appshunter.io/ios/app/harbor-pilates/id6624302320)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TREMBLE Studios free?

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

### Is Harbor Pilates free?

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

### Do TREMBLE Studios or Harbor Pilates have ads?

Neither TREMBLE Studios nor Harbor Pilates shows ads.

### Which is updated more often, TREMBLE Studios or Harbor Pilates?

TREMBLE Studios ships an update monthly, and Harbor Pilates every 3 months. Most recently, TREMBLE Studios was updated on September 22, 2026 and Harbor Pilates on May 17, 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.*