Menu bar stargazing planner

Starglass sits in your menu bar and tells you, every evening, whether tonight is worth setting up the telescope.

Starglass Sample mode detail — Starglass sample seven-night outlook. · View full screenshot ↗

Planned as freeIn developmentComing to the Mac App Store. It hasn’t been submitted yet.

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Requires macOS 14.0 or later

What it does

What Starglass does

From the menu bar

Starglass sits in your menu bar and tells you, every evening, whether tonight is worth setting up the telescope. It blends hourly cloud cover, visibility, humidity and wind into a single 0-100 score for your chosen city, computes astronomical darkness locally from real sun and moon positions, and flags the best night of the coming week. Tonight's score with an hourly cloud timeline for the dark window.

Starglass sample tonight score and cloud timeline. · View full screenshot

Inside the appSeven-night outlook with the best night starred. Moon illumination for tonight.
Working with StarglassSearch any city worldwide; no location permission needed. Optional notification when a clear dark night is coming.
Before you use itCached forecasts with offline and stale-data labels. Refresh manually, on wake, at day changes, and periodically. Forecast data by Open-Meteo (open-meteo.com), free for non-commercial use.

Inside the app

More screenshots

Who it is for

Using Starglass

Know before you set up the telescope.

Privacy and support

Read Starglass’s privacy policy and support page.

App privacy policy · Get help with Starglass · Starglass support

Good to know

App details

What does Starglass do?

Starglass sits in your menu bar and tells you, every evening, whether tonight is worth setting up the telescope.