# SLT vs Harbor Pilates

The clearest difference is update cadence: SLT at every 4 weeks 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.

SLT ships an update every 4 weeks, Harbor Pilates every 3 months. The most recent releases landed on September 23, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | SLT | Harbor Pilates |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3.3K ratings)](https://appshunter.io/ios/app/slt/id1473159998/reviews)** | — |
| Number of ratings | **3.3K** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | 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 | [Mariana Tek Corporation](https://appshunter.io/developer/1178746980) | [Apex Global Solutions Inc](https://appshunter.io/developer/903321221) |

## What reviewers say

### SLT

[App page](https://appshunter.io/ios/app/slt/id1473159998)

Book and manage fitness classes directly from your phone. View studio schedules, purchase class packages, and access your account information. Stay connected with the studio through social media links.

**Highlights:** Book classes, View studio schedules, Purchase class packages, Manage account, View reservations, Find studio locations

**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 SLT free?

SLT 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 SLT or Harbor Pilates have ads?

Neither SLT nor Harbor Pilates shows ads.

### Which is updated more often, SLT or Harbor Pilates?

SLT ships an update every 4 weeks, and Harbor Pilates every 3 months. Most recently, SLT was updated on September 23, 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.*