# Sleep Time Calculator vs Sleep Calculator Plus

The clearest difference is rating: Sleep Calculator Plus at 4.8 against Sleep Time Calculator's 3.8. Sleep Calculator Plus also leads on review sentiment (100% vs 70%) and update cadence (daily vs every 3 months). Sleep Time Calculator's advantage is iOS requirement (8.0 vs 16.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sleep Calculator Plus holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 23 and 32 respectively. Written reviews point the same way: 70% of Sleep Time Calculator's written reviews are positive against 100% of Sleep Calculator Plus's.

Sleep Time Calculator ships an update every 3 months, Sleep Calculator Plus daily. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Sleep Time Calculator | Sleep Calculator Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (23 ratings)](https://appshunter.io/ios/app/sleep-time-calculator/id606077861/reviews) | **[4.8 (32 ratings)](https://appshunter.io/ios/app/sleep-calculator-plus/id6741904327/reviews)** |
| Number of ratings | 23 | **32** |
| Positive reviews | 69.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free | Free |
| Size | 55 MB | 1 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Recked Software LLC](https://appshunter.io/developer/606077864) | [Kevin Hausen](https://appshunter.io/developer/1794777127) |

## What reviewers say

### Sleep Time Calculator

[App page](https://appshunter.io/ios/app/sleep-time-calculator/id606077861)

This free utility helps you determine optimal wake-up times based on sleep cycles. It aims to reduce grogginess by recommending times to rise at the end of a sleep cycle, promoting a more alert feeling.

**Highlights:** Optimal wake-up time recommendations, Sleep cycle analysis, Reduces grogginess, Promotes alertness, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleep Calculator Plus

[App page](https://appshunter.io/ios/app/sleep-calculator-plus/id6741904327)

This utility helps you determine the ideal times to sleep or wake up by calculating based on natural 90-minute sleep cycles. It aims to help users feel more refreshed and energized by waking them between these cycles.

**Highlights:** Calculate optimal bedtime, Find best wake-up times, Supports 12/24 hour formats, Intuitive interface, Dark design for nighttime, No ads or in-app purchases

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Time Calculator free?

Sleep Time Calculator is free to download, with no in-app purchases.

### Is Sleep Calculator Plus free?

Sleep Calculator Plus is free to download, with no in-app purchases.

### Which has better reviews, Sleep Time Calculator or Sleep Calculator Plus?

Sleep Calculator Plus is rated higher. Sleep Time Calculator averages 3.8 out of 5 from 23 ratings, while Sleep Calculator Plus averages 4.8 from 32 ratings.

### Do Sleep Time Calculator or Sleep Calculator Plus have ads?

Neither Sleep Time Calculator nor Sleep Calculator Plus shows ads.

### Which is updated more often, Sleep Time Calculator or Sleep Calculator Plus?

Sleep Time Calculator ships an update every 3 months, and Sleep Calculator Plus daily. Most recently, Sleep Time Calculator was updated on November 1, 2026 and Sleep Calculator Plus on November 8, 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.*