We use cookies and other technologies on this website to enhance your user experience.
By clicking any link on this page you are giving your consent to our Privacy Policy and Cookies Policy.

About Sidereal

Track local sidereal time, schedule alerts, and calculate sidereal time anywhere

Sidereal helps astronomers, telescope users, and night-sky observers track Local Sidereal Time quickly and reliably.

Use Sidereal to view the current local sidereal time, calculate sidereal time manually from longitude, search locations, and plan ahead with future sidereal time tools. You can also create scheduled alerts so you never miss an important observing window.

Features:

View current Local Sidereal Time

Calculate sidereal time manually from longitude

Search by city or location

Use decimal or DMS longitude entry

Schedule sidereal alerts and reminders

Export upcoming alerts to your calendar

Browse future sidereal times for planning

Choose light, dark, or night-vision display modes

Sidereal is designed to be fast, practical, and easy to use in the field, whether you are setting up for imaging, aligning a mount, or planning an observing session.

What's New in the Latest Version 4.1.0

Last updated on May 3, 2026

General bug fixes, maintenance updates, and performance improvements.

Translation Loading...

Additional APP Information

Latest Version

Request Sidereal Update 4.1.0

Uploaded by

Kopopo

Requires Android

Android 7.0+

Available on

Get Sidereal on Google Play

Show More

Sidereal Screenshots

Also available for other platforms

Subscribe to APKPure
Be the first to get access to the early release, news, and guides of the best Android games and apps.
No thanks
Sign Up
Subscribed Successfully!
You're now subscribed to APKPure.
Subscribe to APKPure
Be the first to get access to the early release, news, and guides of the best Android games and apps.
No thanks
Sign Up
Success!
You're now subscribed to our newsletter.