# Sleep Timer vs Sleep Calculator App

The clearest difference is review sentiment: Sleep Timer at 57% against Sleep Calculator App's 0%. Sleep Timer also leads on rating (4.7 vs 3.0) and ads (none vs shown). Sleep Calculator App's advantage is monetization model (free with in-app purchases vs subscription). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Sleep Timer sells 10 in-app purchases, starting at $1.99 per 7 days and Sleep Calculator App sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sleep Timer holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Sleep Timer has 1.5K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 57% of Sleep Timer's written reviews are positive against 0% of Sleep Calculator App's.

Sleep Timer ships an update every 2 months, Sleep Calculator App every 8 months. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Sleep Timer | Sleep Calculator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.5K ratings)](https://appshunter.io/ios/app/sleep-timer-smart-alarm/id1057027109/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/sleep-calculator-app/id1608356513/reviews) |
| Number of ratings | **1.5K** | 2 |
| Positive reviews | **56.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 84 MB | 31 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kodeon, Inc.](https://appshunter.io/developer/1748846686) | [Luz Ochoa](https://appshunter.io/developer/1508017518) |

## What reviewers say

### Sleep Timer

[App page](https://appshunter.io/ios/app/sleep-timer-smart-alarm/id1057027109)

This app helps you wake up feeling refreshed by tracking your sleep cycles. It calculates the optimal time to go to bed or wake up based on your sleep patterns and allows you to set an alarm for the ideal moment.

**Highlights:** Sleep cycle tracking, Optimal wake-up time calculation, Bedtime recommendations, One-click alarm setting, Growth Bundle integration

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $1.99 | per 7 days |
| Week | $2.99 | per 7 days |
| Month | $5.99 | per month |
| Year | $6.99 | per year |
| Year | $14.49 | per year |
| Year | $17.99 | per year |
| Year | $29.99 | per year |
| Sleep Timer Premium | $29.99 | per year |
| Growth Bundle: Yearly | $99.99 | per year |
| Upgrade to Premium | $2.99 | one-time |


### Sleep Calculator App

[App page](https://appshunter.io/ios/app/sleep-calculator-app/id1608356513)

Optimize your sleep by calculating ideal bedtime and wake-up times based on natural 90-minute sleep cycles. Includes relaxing sounds and meditation to help you fall asleep faster and wake up feeling refreshed.

**Highlights:** Calculate best bedtime, Calculate best wake-up time, Select desired wake-up time, Relaxing sounds, Sleep meditation, No registration required

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium Subscription | $6.99 | one-time |


## Frequently asked questions

### Is Sleep Timer free?

Sleep Timer is free to download, with in-app purchases available.

### Is Sleep Calculator App free?

Sleep Calculator App is free to download, with in-app purchases available.

### Which has better reviews, Sleep Timer or Sleep Calculator App?

Sleep Timer is rated higher. Sleep Timer averages 4.7 out of 5 from 1.5K ratings, while Sleep Calculator App averages 3.0 from 2 ratings.

### Do Sleep Timer or Sleep Calculator App have ads?

Sleep Calculator App shows ads; Sleep Timer does not.

### Which is updated more often, Sleep Timer or Sleep Calculator App?

Sleep Timer ships an update every 2 months, and Sleep Calculator App every 8 months. Most recently, Sleep Timer was updated on October 26, 2026 and Sleep Calculator App on October 21, 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.*