# Sundown vs Solar System Clock

Sundown and Solar System Clock are too close to call on the numbers: across 7 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Sundown sells 1 one-off in-app purchase and Solar System Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sundown ships an update every 4 weeks, Solar System Clock every 6 weeks. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Sundown | Solar System Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (9 ratings)](https://appshunter.io/ios/app/sundown-sunrisesunset-alerts/id6711351809/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 32 MB | 26 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Recursive Ink Ltd](https://appshunter.io/developer/1770059606) | [Sunita George](https://appshunter.io/developer/1777332550) |

## What reviewers say

### Sundown

[App page](https://appshunter.io/ios/app/sundown-sunrisesunset-alerts/id6711351809)

Plan your daily activities and events around natural daylight cycles. Set alarms and reminders linked to sunrise and sunset times, perfect for outdoor activities, photography, or daily routines. Get accurate solar timings for thousands of locations worldwide.

**Highlights:** Sunrise/sunset time alerts, Event scheduling linked to solar cycles, Customizable timeline, Future date planning, Data for 57,000+ locations, Offline functionality, Yearly summary charts

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sundown Gold | $5.99 | one-time |


### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6737652569)

Explore the time and positions of celestial bodies across our solar system. View analog and digital clocks for planets, dwarf planets, and moons, with interactive maps and customizable widgets. Understand planetary seasons and translate times between objects.

**Highlights:** Planet and moon time displays, Analog and digital clock formats, Interactive solar system map, Customizable widgets, Planetary season information, Time translation between celestial bodies

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Planets and Dwarf Planets | $2.99 | one-time |


## Frequently asked questions

### Is Sundown free?

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

### Is Solar System Clock free?

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

### Do Sundown or Solar System Clock have ads?

Neither Sundown nor Solar System Clock shows ads.

### Which is updated more often, Sundown or Solar System Clock?

Sundown ships an update every 4 weeks, and Solar System Clock every 6 weeks. Most recently, Sundown was updated on October 7, 2026 and Solar System Clock on October 15, 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.*