Sundown vs Solar System Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sundown
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.
- 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
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Sundown helps you plan your day in harmony with the sun. Whether you’re timing a sunset walk or organizing daily routines around natural light, Sundown makes scheduling effortless by linking your events to the sun’s daily cycle at your location. No more guesswork or mental arithmetic – just simple, intuitive planning aligned with the rhythm of the sun! • Set up an alarm clock linked to the local sunrise time. • Plan your runs, hikes, or walks to finish just before sunset. • Capture the perfect photo during the “golden hour” before sunset. • Set reminders for evening routines, like closing the garage door after dark. • Sync work tasks or outdoor projects with daylight hours. • Plan your mealtimes or sleep cycles around the sun. • Schedule stargazing activities based on astronomical twilight hours. • Never forget to walk the dog before dark – Sundown keeps you on track! Key features: • Get accurate times for sunrise, sunset, dawn, dusk, solar noon, and solar midnight, as well as nautical and astronomical variants. • Set recurring events tied to solar movements with just a few taps. • Customize your timeline to show only the events that matter to you. • Plan ahead by viewing your scheduled event times for future dates. • Data available for 57,000 locations around the world. • Or get precise timings for your exact location. • View summary charts and statistics for the entire year. • Track the sun’s path across the horizon in a beautifully crafted app. • Works anywhere – no internet connection required. • No ads. No tracking. Your data stays completely private. Sundown Gold (one-time purchase): • Get timely alerts for your scheduled events, so you’ll never miss a moment. • Add the widget to your home/lock screen to track upcoming events without even opening the app. • Personalize the app and widget by changing the theme color to suit your mood or style. • Keep track of events with countdown timers visible on your lock screen and Apple Watch. • Set up multiple favorite locations. ---------------- By downloading Sundown, you agree to: • Apple’s standard end user license agreement (EULA), available at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Sundown’s privacy policy, available at: https://sundown.recursive.ink/privacy
Solar System Clock
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.
- Planet and moon time displays
- Analog and digital clock formats
- Interactive solar system map
- Customizable widgets
- Planetary season information
- Time translation between celestial bodies
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No AI was used in the making of this app, including code and visual assets. The app comes with the Earth and Mars clocks free of charge (including associated moons), and additional planet clocks can be purchased through the app or the App Store. The purchase also includes the new customisable widgets and the current and past positions of supported objects. Did you ever want to know the time on Saturn? The simple Solar System Clock can tell the time on any planet or dwarf planet, and the Sun in relation to Earth time. Calculated from the starting date of the Gregorian calendar, the app displays seconds, minutes, hours, days and years for each object based on orbit and rotation data. The time is given in both analog and digital formats and can be stopped and restarted for easy viewing, while keeping to the accurate localised time. A single analog clock face for all planets and dwarf planets is also included, and can be split into two clocks for main planets and dwarf planets. Times can be freely translated between planets, the Sun and moons. The app also provides the current and past positions of the planets, moons and dwarf planets to scale in the form of an interactive map, and the seasons on every planet and dwarf planet. A widget form of the Earth and Mars clocks is provided for circular widget slots on Apple Watch, and widgets on other supported devices can be customised within the app. An iMessage extension is also included to enable easy communication using the time systems. The main clock can also be projected as functional wall art.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sundown | Solar System Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (9 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 9 — better | — |
| Update frequency | Every 4 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 32 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Recursive Ink Ltd | Sunita George |
Customer experience
Sundown
Solar System Clock
In-app purchases
Sundown
- Sundown Gold$5.99
Solar System Clock
- All Planets and Dwarf Planets$2.99
Questions
Is Sundown free?
Is Solar System Clock free?
Do Sundown or Solar System Clock have ads?
Which is updated more often, Sundown or Solar System Clock?
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