# Twinkle Clock vs Sun Based Time

The clearest difference is in-app purchases: Sun Based Time at none against Twinkle Clock's 1. Sun Based Time also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Twinkle Clock | Sun Based Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/sun-based-time/id6762237121/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | — | Free |
| Size | 23 MB | 57 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyasu Hirai](https://appshunter.io/developer/455568461) | [JAVED SHAH](https://appshunter.io/developer/1893499163) |

## What reviewers say

### Twinkle Clock

[App page](https://appshunter.io/ios/app/twinkle-clock/id6467501688)

**Features:** iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Twinkle Clock Pro | $24.99 | one-time |


### 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


## Frequently asked questions

### Is Twinkle Clock free?

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

### Is Sun Based Time free?

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

### Do Twinkle Clock or Sun Based Time have ads?

Neither Twinkle Clock nor Sun Based Time 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.*