Sun Clock App vs Desktop Astro Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sun Clock App
This utility app displays the current time and the sun's position for your location. It shows solar time, sunrise, and sunset, with options to toggle seconds and 12/24-hour formats. The app automatically updates your location and can keep your device awake for continuous display.
- Shows solar time
- Displays sunrise and sunset times
- Toggle seconds display
- 12/24 hour format option
- Automatic location updates
- Keeps device awake
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This clock shows the time and the position of the sun for your current location. The blue line shows how much time of the day is already gone. Features: - shows the solar time, sunrise and sunset times - toggle the display of the seconds - toggle between 12 and 24 hours - the location is automatically updated when you move - keeps the device awake, so it can be used as a real clock
Desktop Astro Clock
This utility app displays time in various formats, including Julian, Sidereal, and GMT. It offers always-on display options, moon and meteor shower information, and customizable clock configurations. Widgets and a watchOS app are also supported for enhanced functionality.
- Multiple time formats (Julian, Sidereal, GMT)
- Always-on display with battery threshold
- Moon phase and meteor shower information
- Customizable display configurations
- Widget support
- WatchOS app with specialized displays
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Desktop Astro Clock (formally known as: yabc - Yet Another Bedside Clock). This is a clock app that is designed to be run at the desktop, bedside or near a star map. It will display the time without turning off until the battery percentage drops below a user specified value. There are ten predefined, and one user defined display configurations. A single tap of the moon and star icon will bring up a red tinted clock showing the local sidereal time. In settings, you can add a moon display, meteor showers display, change colors, and configure the user defined clock display. Widgets are now supported and can be configured via Widget editing. A watchOS app is now included that displays a red tinted Modified Julian date, GMT Sidereal time, Moon, Moon name, and moon age in days. No ads, ever. Lock screen widgets include rectangular (two clock values look good here) and circular (for the current moon) Features: - Time display in various fixed formats - Time display in a user defined format + color - Always on display until a user specified battery level is reached (iOS) - Moon display with moon transit details and full moon names *(4)* - Meteor Shower information (when visible) with star chart locator - Blue moons are known by the tag [blue moon] added to the full moon name and a blue tint to the full moon image - Super moons are known by the tag [super] added to the full moon name Clock Times: - GMT - Greenwich Mean Time - GMST - Greenwich Mean Sidereal Time - Julian Date - Seconds since noon 1st January 4713 B.C. - LMST - Local Mean Sidereal Time *(3)* - Modified Julian Date - Julian Date - 2400000.5 Predefined displays: - Desk Clock - Day, Time, Date - ISO 8901 - yyyy-mm-ssThh:mm:ss+tz - ISO 8901 GMT - yyyy-mm-ssThh:mm:ssZ - Greenwich Mean Sidereal Time - 'HH'h 'mm's 'ss' - Julian - day.time in seconds since noon 1st January 4713 B.C. - Local Mean Sidereal Time - 'HH'h 'mm'h *(3)* - System Default - based on your iOS settings - Time HH:MM:SS, Month, Day - Time HH:MM - Time HH:MM:SS, Day, Month, Year - User Defined - you pick the format! Widgets (One or more): - Meteor Showers *(1)* - Moon - Moon with details - Moon Names *(4)* - Julian Date *(2)* - Sidereal Date *(2)* - User Defined Clock *(2)* WatchOS App: - Black background, Red tint, brightness adjustable with crown, shows Mofidied Julian Date, GMT Sideral Time, Moon face, Moon name, and Moon age *(3)* *(4)* - Corner complication shows Moon, Modified Julian and Local Sidereal time Lock screen Widgets: - Rectangular for clock values (i.e.: Julian date and Sidereal time) - Circular for the current moon *(1) If no Meteor shower is in progress, just an image is shown* *(2) Widgets do not support real time non-system clocks well. Updates will typically be between 15-60 minutes* *(3) If you select Local Sidereal Mean Time display, you'll also need to enable the setting to allow access to your location information (only needs your longitude for the calculations). Default will be Greenwich England* *(4) If you select Moon names, you'll also need to enable the settings to allow access to your location information (only need to check latitude > 0 for Northeren/Southeren hemishpere). Default will be at the equator*
Screenshots
Verdict
The clearest difference is rating: Sun Clock App at 4.3 against Desktop Astro Clock's 3.7. Sun Clock App also leads on iOS requirement (9.0 vs 17.0). Desktop Astro Clock's advantage is in-app purchases (none vs 1) and update cadence (every 9 months vs every 33 months). On price, ratings volume, ads and monetization model there is nothing between them.
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. Sun Clock App sells 1 one-off in-app purchase. Desktop Astro Clock asks for nothing beyond the download.
Sun Clock App holds the better App Store score, 4.3 against 3.7. Both are backed by a comparable volume of ratings — 4 and 3 respectively.
Sun Clock App ships an update every 33 months, Desktop Astro Clock every 9 months. The most recent releases landed on September 25, 2026 and September 19, 2026 respectively.
| Parameter | Sun Clock App | Desktop Astro Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 4 — better | 3 |
| Update frequency | Every 33 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 416 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | BEHR Consulting International |
Customer experience
Sun Clock App
Desktop Astro Clock
In-app purchases
Sun Clock App
- Sun Clock - Upgrade$0.99
Desktop Astro Clock
No in-app purchases
Questions
Is Sun Clock App free?
Is Desktop Astro Clock free?
Which has better reviews, Sun Clock App or Desktop Astro Clock?
Do Sun Clock App or Desktop Astro Clock have ads?
Which is updated more often, Sun Clock App or Desktop Astro Clock?
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