# SLT vs SleepSound Simple

The clearest difference is price: SLT at Free against SleepSound Simple's $0.99. SLT also leads on iOS requirement (16.0 vs 26.0). SleepSound Simple's advantage is update cadence (weekly vs every 4 weeks). On ads, in-app purchases and device support there is nothing between them.

SLT is free to download; SleepSound Simple costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SLT ships an update every 4 weeks, SleepSound Simple weekly. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SLT | SleepSound Simple |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 38 MB | 62 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Mariana Tek Corporation](https://appshunter.io/developer/1178746980) | [Andy Ramirez](https://appshunter.io/developer/6792880426) |

## 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


### SleepSound Simple

[App page](https://appshunter.io/ios/app/sleepsound-simple/id6792880424)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SLT free?

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

### Is SleepSound Simple free?

SleepSound Simple costs $0.99, with no in-app purchases.

### Do SLT or SleepSound Simple have ads?

Neither SLT nor SleepSound Simple shows ads.

### Which is updated more often, SLT or SleepSound Simple?

SLT ships an update every 4 weeks, and SleepSound Simple weekly. Most recently, SLT was updated on October 20, 2026 and SleepSound Simple on October 6, 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.*