# Polar Clock

> A small clock tool designed to help in the alignment of your telescope.

Canonical page: [https://chrome-stats.com/d/com.astrotools.polarclock](https://chrome-stats.com/d/com.astrotools.polarclock)

## Overview

- **ID:** `com.astrotools.polarclock`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Zsolt Nagy
- **Category:** TOOLS
- **Downloads:** 64,382
- **Rating:** 4.74 / 5 (456 ratings)
- **Version:** 1.10
- **Last updated:** 2024-05-11
- **First published:** 2019-12-11
- **Publisher country:** US
- **Size:** 5.10 MB
- **Data as of:** 2026-09-12
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.astrotools.polarclock)
- **Privacy policy:** [https://drive.google.com/file/d/1UN\_fV-rKYF6ed3knZHCwuJ2l7uyCBRx8/view?usp=sharing](https://drive.google.com/file/d/1UN_fV-rKYF6ed3knZHCwuJ2l7uyCBRx8/view?usp=sharing)

## Description

Polar Clock is a lightweight Chrome extension designed for amateur astronomers and telescope users. It assists in the precise polar alignment of equatorial mounts by displaying critical information such as Polaris' hour angle, local time, sidereal time, UTC time, and GPS coordinates.

The extension is especially helpful for users of Orion and SkyWatcher mounts by visualizing Polaris in a virtual polar scope, simplifying the setup process for accurate celestial tracking. Its easy-to-use interface makes it an essential tool for accurate telescope alignment and improved stargazing experiences.

## Rankings

- #269,151 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_FINE_LOCATION`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`

## Review summary

### Pros

- Free and ad-free app that is functional and uncluttered.
- Accurate for polar alignment and easy to use.
- Clean interface with straightforward guidance.
- Ability to rotate the reticle for better alignment.
- GPS and sidereal time are accurate.

### Cons

- Some users experienced issues with the app not working correctly or displaying errors.
- The polar scope view's orientation can be problematic for some users depending on their equipment.
- Minor display bugs reported, such as the app staying fullscreen intermittently.

## Similar extensions and apps

- [Astronomy Tools - Polar Align.](https://chrome-stats.com/d/globedition.astronomytools) — 250 users
- [PolarScopeInit](https://chrome-stats.com/d/com.heartlan.polarscopeinit) — 237 users
- [PolarFinder Pro](https://chrome-stats.com/d/com.lunari.polarfinderpro) — 17,446 users, 4.49 / 5
- [Polaris Clock](https://chrome-stats.com/d/org.suncomp.polaris_clock) — 55 users
- [Daytime Polar Alignment](https://chrome-stats.com/d/com.lunari.daytimealignment.beta) — 2,023 users, 4.32 / 5
- [Polar Scope Align Pro (PS A)](https://chrome-stats.com/d/com.kechagias.psalignpro) — 746 users
- [PolarAligner Pro (Astro Tool)](https://chrome-stats.com/d/appinventor.ai_kechko.Polaralignment) — 22,203 users, 3.29 / 5
- [PF-L Assist](https://chrome-stats.com/d/jp.co.vixen.ReticleVwGL) — 12,441 users
- [Clock with Planisphere lite](https://chrome-stats.com/d/io.github.withlet11.skyclocklite) — 312 users
- [Clock with Planisphere](https://chrome-stats.com/d/io.github.withlet11.skyclock) — 1,282 users
- [Solar Polar Alignment](https://chrome-stats.com/d/com.ammar174.solarcompass) — 1,896 users, 4.43 / 5
- [AstroClock](https://chrome-stats.com/d/com.hajiamzar.astroclock) — 247 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/com.astrotools.polarclock)