LSTclock: sidereal time clock

by Tsuyoshi Sawada · Utilities · Free

On the App Store since April 2020 · Data updated 2026-10-28

LSTclock: sidereal time clock is made and published by Tsuyoshi Sawada. AppBrain is an independent app data site and isn't affiliated with Tsuyoshi Sawada. The app name, icon, screenshots and description belong to Tsuyoshi Sawada and are shown as published on the App Store.

AppBrain's verdict

Established

Rating on App Store: 3.80; 10 ratings
Last updated: October 22, 2026
Size: 21.5 MB

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Official page on the App Store

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Store listing

By Tsuyoshi Sawada, from the App Store

Screenshots by Tsuyoshi Sawada, from the the App Store listing

Description by Tsuyoshi Sawada Written by the developer, not by AppBrain. Click to read.

LSTclock is an iOS/iPadOS/watchOS app that displays the local sidereal time (LST) at registered location(s). On iOS/iPadOS, it can also calculate LST and Julian Date for any date and time. The list of locations can be synced between iPhone and paired Apple Watch(es).

Official page on the App Store

Safety and technology

Found in the app by AppBrain

Price: Free
App size: 21.5 MB
Content rating: Everyone

Technologies used by LSTclock: sidereal time clock

Releases

Updates seen on the App Store

Version: 10.0
Launched: April 2020

No changelog data

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About the app and developer

About LSTclock: sidereal time clock

LSTclock: sidereal time clock is an utilities app developed by Tsuyoshi Sawada.

What is the rating of LSTclock: sidereal time clock?

LSTclock: sidereal time clock is rated 3.80 out of 5 stars, based on 10 ratings.

Is LSTclock: sidereal time clock free?

LSTclock: sidereal time clock is free. The app size is 21.55 MB. The latest version available is 10.0. The last update was on October 22, 2026.

What are the requirements for LSTclock: sidereal time clock?

The app has a content rating of Everyone. The app has been available on the App Store since April 2020.

Developer information for Tsuyoshi Sawada

Tsuyoshi Sawada

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