# Sleep Cycle Calculator: Sounds — Wake Up Time Calc - Rem Sleep

> Calculates sleep cycles, duration, and provides sleep sounds for better rest. (iPhone/iPad app by Phan Nhat Đang.)

- Source: https://appshunter.io/ios/app/sleep-cycle-calculator-sounds/id1669183385 (this page in markdown: same URL + `.md`)
- Developer: [Phan Nhat Đang](https://appshunter.io/developer/1437390098)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 4.70/5 from 15 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 4 MB
- Languages: Russian, Vietnamese, American English, Dutch, Danish, Indonesian, Latin American Spanish, Italian, Korean, Malay and 12 more
- Released: 2023-03-02
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sleep-cycle-calculator-sounds/id1669183385/reviews.md

## What is Sleep Cycle Calculator?

Sleep Timer: Calculator, Sounds helps you calculate bedtime and wake-up options based on your sleep schedule.

Main Features:

• Calculate bedtimes and wake-up times by sleep cycle.
• Calculate sleep schedules by preferred duration.
• Customize fall-asleep time and cycle length.
• Play sleep sounds with an optional timer.

Disclaimer:

Sleep Timer: Calculator, Sounds provides sleep schedule calculations for informational purposes only. It is not a medical device and does not provide medical advice, diagnosis, or treatment.

SUBSCRIPTION INFORMATION
An optional subscription gives you unlimited access to all app features during the active subscription period. A one-time purchase option may also be available for lifetime access.

• Payment will be charged to your Apple Account at confirmation of purchase.
• The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
• Your account will be charged for renewal within 24 hours before the end of the current period.
• You can manage or cancel your subscription in your App Store account settings after purchase.
• Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable.

Privacy Policy: https://13520178.github.io/sleepcalculator/policy.html
Terms of Use: https://13520178.github.io/sleepcalculator/terms.html
Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

For questions or support, contact us at:
phannhatd@gmail.com

## Key features

- Sleep cycle calculation
- Optimal sleep duration calculation
- Variety of sleep sounds
- User-friendly interface
- Subscription for unlimited access

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 1-Month Subscription | $1.99 | per month |
| 1-Year Subscription | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all features | $17.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/sleep-cycle-calculator-sounds/id1669183385/reviews.md

### 5/5 — Simple efficace

*2025-02-19*

Parfait

### 1/5 — Вообще не работает

*2024-12-22*

Нет возможности ничего сохранить и нет даже кнопок в меню с другими параметрами сна, кроме установки будильника, который тоже не установить

### 2/5 — Приложение слилось

*2024-06-17*

Теперь не показывает 1-7 циклов сна, пока его не купишь.

### 5/5 — рекомендую!

*2024-05-28*

приложение сделано качественно, выглядит приятно, все нужные функции в ней есть. однозначно пять звезд! жаль, что оно незаслуженно непопулярно

### 4/5 — Falta programar o alarme a partir do App

*2024-01-13*

O aplicativo é ótimo. Era isso que eu precisava, calcular os ciclos de sono para saber que horas dormir ou que horas acordar.

Para ficar perfeito, poderia ter a opção de criar um alarme selecionando uma das sugestões de tempo.

### 4/5 — bien

*2024-01-10*

question si on dors à 3h on dois commencer à dormir à 3h ou on dois déjà dormir à 3h ?

### 5/5 — Полезное приложение

*2023-12-04*

Очень нужное для меня приложение. Работает отлично и все понятно

## Frequently asked questions about Sleep Cycle Calculator

### How does Sleep Cycle Calculator: Sounds determine optimal sleep times?

It calculates optimal sleep and wake times based on the 90-minute sleep cycle and your desired wake-up time or sleep duration. This helps align your sleep with natural cycles for better rest.

### What kind of sounds are available in Sleep Cycle Calculator: Sounds?

The app offers a variety of sounds specifically designed to help users fall asleep faster and experience deeper, more restful sleep. These sounds aim to create a calming sleep environment.

### What are the subscription options for Sleep Cycle Calculator: Sounds?

Users can choose between a 1-Month Subscription for $1.99 or a 1-Year Subscription for $9.99. These subscriptions provide unlimited access to all app features.

### How can I manage my subscription for Sleep Cycle Calculator: Sounds?

Subscriptions can be managed by the user, and auto-renewal can be turned off by going to your Account Settings after purchase. Auto-renewal must be disabled at least 24 hours before the end of the current period.

### Does Sleep Cycle Calculator: Sounds have ads?

Yes, this app contains advertisements. While it offers free features, users may encounter ads during their use of the application.

### What devices is Sleep Cycle Calculator: Sounds compatible with?

The app is designed for Apple devices and is compatible with iPhone, iPad, and iPod. It requires a device running iOS.

### How often is Sleep Cycle Calculator: Sounds updated?

The latest version, 2.3.0, was last updated on April 26, 2026. While this indicates a recent update, users can expect ongoing improvements and bug fixes.

### What is the age rating for Sleep Cycle Calculator: Sounds?

Sleep Cycle Calculator: Sounds has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content concerns.

## Version history (last 5 releases)

### 2.6.0 — 2026-08-20

Bug fixes and performance improvements.

### 2.5.0 — 2026-08-04

Bug fixes and performance improvements.

### 2.4.1 — 2026-05-19

Bug fixes and performance improvements.

### 2.4.0 — 2026-05-18

Bug fixes and performance improvements.

### 2.3.0 — 2026-04-26

Bug fixes and performance improvements.

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All apps by Phan Nhat Đang: https://appshunter.io/developer/1437390098

## Related topics

[sleep cycle calculator](https://appshunter.io/ios/topics/sleep-cycle-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*