# Sun Based Time vs SleepCycle

The clearest difference is in-app purchases: Sun Based Time at none against SleepCycle's 1. Sun Based Time also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. SleepCycle sells 1 one-off in-app purchase. Sun Based Time asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Sun Based Time against 5.0 for SleepCycle. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | Sun Based Time | SleepCycle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sun-based-time/id6762237121/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sleepcycle-sleep-calculator/id6763971847/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 8 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [JAVED SHAH](https://appshunter.io/developer/1893499163) | [MARTHEN LUKAS LUMINGKEWAS](https://appshunter.io/developer/1895580837) |

## What reviewers say

### Sun Based Time

[App page](https://appshunter.io/ios/app/sun-based-time/id6762237121)

This app uses the sun's position to help you schedule your day and set alarms. It offers features like countdowns to sunrise and sunset, and alarms based on solar events or desired sleep duration. Visualize the sun's path and integrate with your calendar for a natural approach to time management.

**Highlights:** Sun-based clock, Countdown to sunrise/sunset, Visualize sun's path, Alarms by sun position, Wake by sleep duration, Sleep window by sunset/sunrise, Calendar integration

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

**In-app purchases:** none


### SleepCycle

[App page](https://appshunter.io/ios/app/sleepcycle-sleep-calculator/id6763971847)

Optimize your sleep and wake up feeling refreshed with this science-based sleep optimizer. It calculates ideal bedtimes and wake-up windows based on your sleep cycles, featuring a smart alarm and detailed sleep tracking.

**Highlights:** Calculates optimal bedtimes and wake-up windows, Smart alarm with soothing sounds, Sleep history and tracking, Sleep science education, Personalized sleep insights (Premium)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $19.99 | one-time |


## Frequently asked questions

### Is Sun Based Time free?

Sun Based Time is free to download, with no in-app purchases.

### Is SleepCycle free?

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

### Which has better reviews, Sun Based Time or SleepCycle?

Sun Based Time and SleepCycle are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Sun Based Time or SleepCycle have ads?

Neither Sun Based Time nor SleepCycle shows ads.

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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.*