SLT vs SleepSound Simple
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SLT
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.
- Book classes
- View studio schedules
- Purchase class packages
- Manage account
- View reservations
- Find studio locations
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This is the official App for SLT NYC. With this App, you can find and book your SLT classes, view studio locations and schedules, buy and book your classes, as well view your existing reservations and manage your account. Find us on Instagram at @sltnyc and check out our site at sltnyc.com.
SleepSound Simple
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Rest easy with SleepSound Simple, a focused sleep-sound app that works entirely offline. Choose from owner-recorded Soft Rain, Medium Rain, or White Noise. Set playback for up to 14 hours or leave it running Until Stopped. Wake on your terms with: • One-time alarms • Nine-minute snooze • A 20-minute Ease Into Wake transition that fades your sleep sound into morning birds • Bedside Mode with a warm sunrise-inspired screen transition while the app is visible SleepSound Simple has no account, ads, subscriptions, or cloud dependency. Your selected sound, timer, alarm, and Bedside Mode preferences stay on your device. Alarm access is requested only when you enable an alarm.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 17, 2026 and October 6, 2026 respectively.
| Parameter | SLT | SleepSound Simple |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (3.3K ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 3.3K — better | — |
| Update frequency | Every 4 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 38 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | Mariana Tek Corporation | Andy Ramirez |
In-app purchases
SLT
No in-app purchases
SleepSound Simple
No in-app purchases
