Nyx: Dark Sky Planner

Nyx: Dark Sky Planner

Plan a darker night

2 ratings
Free

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Details

Released
October 7, 2026
Updated
November 5, 2026

Features

Nyx: Dark Sky Planner screenshot #1 for iPhone
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Nyx: Dark Sky Planner screenshot #10 for iPhone
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About

This app helps you find the best locations and nights for stargazing by providing a darkness score based on moon phase, clouds, and sky glow. It offers detailed information for US national parks and dark-sky locations worldwide, with planning tools and real-time sky event updates.

✓Nightly darkness score (0-100)
✓Moon, cloud, and sky glow analysis
✓US National Park data
✓Global dark-sky locations
✓Two-week planning timeline
✓Real-time sky event notifications
✓Field mode with countdown
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What's New in Nyx

2.12

November 5, 2026

Tonight's sky can follow your iPhone. Choose "Follow my iPhone" and the sky faces wherever the back of your phone points, with the horizon kept level. It uses no camera and asks for no new permission. A drag or a direction hands the sky back to you. Closures are harder to miss. Turn your iPhone sideways and a closure stays on the first screen, with the dial whole beside it. The Tonight control in Control Center names what is closed, in the Park Service's words, and stays current after background refreshes. On Apple Watch, a closure kept from an earlier update says so, and the watch says when closures are not being checked. Clearer rankings. When two nights tie, the one with more Moon-free darkness ranks first. A night with no clouds to count says "Moon and darkness only" wherever its score stands alone, ranks after nights that count clouds, and is never offered as the better choice. Clouds where you stand. Denali and Kenai Fjords now take their cloud forecast at the visitor centers, not deep in the wilderness. Past its summit cloud layers, Haleakalā says "Moon and darkness only" rather than count cloud below the summit. On Apple Watch, the Crown steps through nights on every Tonight face. Tonight also shows the usual clouds and the forecast models' range, and says when a night has no true darkness. Countdowns stay whole on small screens. The Live Activity countdown ticks on its own and can no longer be mistaken for a clock time. The Moon widget shows the night's Moon with the same figure as the Tonight widget, moves on at sunrise, and names the park's time zone. The journal reads a photo only when you reach it, so opening a long journal no longer loads every picture. Your entries and photos move over by themselves, on your device. Also: a tap anywhere on a park row opens it; cancelled days no longer appear in ranger programs, and program times follow your format; reminders and cloud times name the park's time zone; VoiceOver and the largest text sizes work better across every device; iPad windows keep their place when resized; and many small corrections in Spanish, German, French and Japanese.

More

FAQ

What is the darkness score in Nyx?

The darkness score in Nyx ranges from 0 to 100, indicating the quality of the night sky for observation. It is calculated based on the Moon's phase, cloud cover, and ambient sky glow.

Does Nyx have ads?

No, Nyx is ad-free and does not contain advertisements. It also requires no account and does not track user data.

What kind of information does Nyx provide for US National Parks?

For the 63 US National Parks, Nyx provides named viewing spots, Bortle estimates, park alerts, ranger night-sky programs, campground information, and access notes. It also indicates how many stars of the Little Dipper are likely visible.

How far into the future can I plan with Nyx?

You can plan for the next two weeks with Nyx, with the app providing a timeline that shows the Moon's changing shape. For parks, it can also show six months of dark weekends.

What sky events does Nyx track?

Nyx tracks the Milky Way core and its moon-free hours, planets, meteor showers, lunar eclipses, and aurora when NOAA's forecast is available for the location.

Is Nyx available on other devices besides iPhone?

Yes, Nyx is available on Apple Watch for viewing the night sky on its dial, and on Apple Vision Pro for an immersive experience under a computed US national park sky.

How does Nyx handle weather forecasts?

For the next few days, Nyx includes a full cloud forecast. Further out, it transitions to the place's usual cloud cover, and beyond the forecast, only usual clouds are considered and stated.

What is the update frequency for Nyx?

Nyx was last updated on November 5, 2026, with version 2.12. This indicates a relatively frequent update schedule for the application.