# LSTclock vs Desktop Astro Clock

The clearest difference is update cadence: LSTclock at every 2 months against Desktop Astro Clock's every 9 months. LSTclock also leads on ratings volume (10 vs 3). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 3.8 for LSTclock against 3.7 for Desktop Astro Clock. Both are backed by a comparable volume of ratings — 10 and 3 respectively.

LSTclock ships an update every 2 months, Desktop Astro Clock every 9 months. The most recent releases landed on September 9, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | LSTclock | Desktop Astro Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (10 ratings)](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/desktop-astro-clock/id1588806370/reviews) |
| Number of ratings | **10** | 3 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 15 MB | 416 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) | [BEHR Consulting International](https://appshunter.io/developer/385816833) |

## What reviewers say

### LSTclock

[App page](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631)

This utility app displays local sidereal time for registered locations on iOS, iPadOS, and watchOS. It can also calculate sidereal time and Julian Date for any date and time, and sync locations between devices.

**Highlights:** Local sidereal time display, Julian Date calculation, Supports multiple registered locations, Location sync between iPhone and Apple Watch, Date and time specific calculations

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

**In-app purchases:** none


### Desktop Astro Clock

[App page](https://appshunter.io/ios/app/desktop-astro-clock/id1588806370)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LSTclock free?

LSTclock is free to download, with no in-app purchases.

### Is Desktop Astro Clock free?

Desktop Astro Clock is free to download, with no in-app purchases.

### Which has better reviews, LSTclock or Desktop Astro Clock?

LSTclock is rated higher. LSTclock averages 3.8 out of 5 from 10 ratings, while Desktop Astro Clock averages 3.7 from 3 ratings.

### Do LSTclock or Desktop Astro Clock have ads?

Neither LSTclock nor Desktop Astro Clock shows ads.

### Which is updated more often, LSTclock or Desktop Astro Clock?

LSTclock ships an update every 2 months, and Desktop Astro Clock every 9 months. Most recently, LSTclock was updated on September 9, 2026 and Desktop Astro Clock on June 5, 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.*