Nyx privacy policy

Updated October 11, 2026, for Nyx 2.0, which adds places around the world and spots you save. This policy covers Nyx for iPhone, iPad, Apple Watch and Apple Vision Pro, and this website.

What the developer receives

Nothing. Nyx has no server, account system, analytics, crash-reporting SDK or advertising. The developer never receives your journal, photos, saved parks, location or usage. iOS gives Nyx a daily on-device performance summary (MetricKit); Nyx keeps only the last average screen brightness, to show you, and never sends it anywhere.

What stays on your device

Journal and photos. Entries and the photos you choose are stored in the app on your iPhone or iPad. Nyx does not sync them to iCloud. Your device backup settings may include app data. Deleting an entry removes it; deleting the app removes its data, subject to Apple's backups.
Location. Only if you choose "Near me", and only while you use the app. Nyx compares straight-line distances to parks on your device, and works out the sky "From home tonight" there too, with no request at all. Once you have allowed it, the same rough position (accurate to about 3 km) also starts a trip plan from where you are, lets Nyx notice in the evening or at night that you have reached a park, and lets field mode point the sky to true north instead of magnetic north. None of these asks for it again, and Nyx never reads your position in the background. Your coordinates are never sent, unless you save where you stand as a spot; then only that spot's position, rounded to about 11 km (7 miles), is sent for its cloud forecast. Saving where you stand reads your precise location once, keeps it on your device, and sends only the rounded position. Cloud forecasts, park alerts and campgrounds are requested for all 63 US parks together, and forecasts for places around the world by whole regions (below), so none of them reveals which parks are near you; ranger programs are requested only for a park whose page you open. Each can be switched off in Your privacy. You can always choose a starting park instead.
Photos. Chosen through Apple's photo picker. Nyx can see only the photos you select.
Reminders. Local notifications scheduled on your device. About every six hours, iOS may let Nyx refresh the forecasts of your saved places in the background, with the same requests as in the app, so a reminder, a widget, a followed night or the watch never rests on an old forecast. When none of those is in use, a background refresh asks for nothing. Turn reminders off in Nyx, or Background App Refresh in the Settings app.
Saved spots. A spot you save (where you stand, coordinates you type or a town you choose) is stored on your device with its name and any note. Its clouds are requested as described under Open-Meteo below, with its coordinates rounded to about 11 km (7 miles).
Journal export. Export makes a file you save or share yourself, to move your journal to another device. It also holds your saved spots. Nyx never sends it anywhere.
Diagnostics. If Nyx crashes, iOS may give it a technical report. Nyx keeps the last few on your device and shows them in Settings; they leave only if you copy or share one.
Field mode. While "Where to look" is open, Nyx reads your iPhone's or iPad's motion sensors to turn the sky to where you hold it. Nothing is recorded or sent. Alarms you set there are ordinary alarms on your device, and the night's Live Activity is created on your device without any server.
Apple Watch. The watch app makes no network requests. Your iPhone passes it your saved parks, the night-vision setting and the cached cloud forecasts directly, through Apple's WatchConnectivity between your paired devices. The watch works out the sky itself and keeps its settings on the watch.
Apple Vision Pro. The Vision Pro app asks for no permissions: no location, no photos, no notifications. It computes the sky for the park and night you choose on the device itself. Its only network requests go to Open-Meteo (api.open-meteo.com): the cloud forecast for the public coordinates of the 63 US national parks and the cloud layers above Haleakalā's summit, where the score counts only mid and high cloud. Neither carries anything about you; a switch in Your privacy turns both off, and the forecasts are kept on the headset. Apart from that switch's setting and the park you last chose, it stores nothing. It knows only the 63 US national parks. It does not use your surroundings or your room's real direction; the sky it shows is computed, not seen.
Age range. Some US states require apps to check the age range of new accounts. Only where iOS reports that this applies to your account, Nyx asks iOS for an age range once each time it starts. iOS shows its own sheet, and may already know the answer. Nyx stores nothing from the answer, sends it nowhere and changes nothing because of it; Nyx has no age-restricted content.
Links and Maps. Some links open in Safari, Mail or Maps when you tap them: park pages on nps.gov, campground reservations on Recreation.gov, Globe at Night, Open-Meteo and the Creative Commons licence, a place's Wikidata page or its own official website (only over a secure connection), this website, Nyx on the App Store, an email to the developer, or directions in Maps to a viewing spot or to a spot you saved. Nyx itself makes no request for them; what those apps and sites receive is governed by Apple's and their own policies.
On-device AI. On iPhones and iPads that support Apple's on-device model, optional explanations use only the records shown on screen. If you ask Nyx to suggest a description for a journal photo (iOS 27 with Apple Intelligence), the photo goes to that on-device model only. Nothing is sent to a remote AI service.
Followed nights. Follow this night schedules the night's Live Activity on your device, with no server and no push token. It shows the park, the night's times, its score and any closure.
Handoff. A park's page can be picked up on another of your devices signed in to the same Apple Account. Only the park and the night's date are handed over, by Apple's system; Nyx has no server.
Journal by voice. Entries you add with Siri go into the same journal on your device, with the park's own public name and coordinates.
Where to look by sound. If you turn on Sound in field mode and wear headphones that report head movement, Nyx reads that movement to place the tone. iOS asks once for permission first (Motion & Fitness in the Settings app), after a short explanation in Nyx; without it the tone follows your iPhone instead. The movement is used on your device while the view is open, and never recorded or sent.
Translation. When Nyx runs in a language other than English, a Translate button under park alerts and ranger programs opens Apple's translation, which runs on your device. iOS may download a language pack the first time; Nyx sends nothing and stores nothing.

The three network services

Nyx on iPhone and iPad contacts exactly three services, and only to update public information. Nyx on Apple Watch contacts none. Nyx on Apple Vision Pro contacts only Open-Meteo, for cloud forecasts, as described above.

Open-Meteo (api.open-meteo.com) for cloud forecasts, three forecast models for comparison, cloud layers, temperature, dew point, wind and visibility. Requests for the US national parks contain the public coordinates of all 63 (each park's main viewing spot), together in two requests of up to 50, never yours. The cloud layers above Haleakalā's summit, where the score counts only mid and high cloud, may be asked for on their own, with that park's public coordinates only: the same request in every copy of Nyx. One more request asks for clouds at the spots you save: it contains each spot's coordinates rounded to 0.1° (about 11 km (7 miles)), and nothing else about them. So Open-Meteo can tell roughly where your spots are, but not the exact point, their names or which one is which. It is a request of its own, never mixed with the parks, and it has its own switch in Your privacy, "Clouds at your saved spots", on unless you turn it off. Your current location is sent only if you save it as a spot. Forecast detail and smoke are not requested for spots. The national parks and dark-sky places Nyx lists around the world are never asked about one at a time: the world is divided into squares of 10° of latitude and longitude, and a request contains the public coordinates of every catalogue place in one square (at most 1,000), the same coordinates in every copy of Nyx. Squares with only a few places are asked about together, so a lone island park is never asked about on its own. Open-Meteo can therefore tell which part of the world interests you, a region about the size of a country, but not which place you are looking at, and never where you are. These requests use the same Cloud forecasts switch.
Open-Meteo air quality (air-quality-api.open-meteo.com) for the smoke and haze forecast from Copernicus (CAMS), the European atmosphere service. Requests contain the same public park coordinates, never yours.
National Park Service (developer.nps.gov) for park alerts, ranger programs and campgrounds. Alert requests contain the codes of all 63 parks; a program request contains the code of the park you opened. The campground request, at most once a week, contains the codes of all 63 parks and nothing about you. Requests carry an NPS key that ships inside the app, the same one in every copy of Nyx, so it identifies the app and not you. If you enter your own NPS key, it is kept in your device's Keychain, used instead, and sent only to this service.

Nyx paces its forecast requests. A forecast is asked for again only once it is a few hours old (when you pull to refresh, an hour at the earliest for clouds), and when a service asks Nyx to wait, it waits, even across a restart. To stay within Open-Meteo's free limits, Nyx counts its forecast requests on your device: the time of each one and what Open-Meteo counts it as. The count is kept for about two days, shown under Your privacy → Advanced, and never sent anywhere. A background refresh asks for nothing when nothing outside the app shows a forecast: no reminders, no Nyx widget, no followed night and no watch app.

Like any website, these services see your IP address and ordinary request information. Open-Meteo states that its logs are not linked to identities and are deleted after 90 days. Their own policies govern their servers: Open-Meteo, National Park Service. You can switch each service off in Nyx under Settings → Your privacy; information already saved stays available, and moon, twilight, calendar and journal keep working offline.

This website

get-nyx.com sets no cookies and runs no scripts, analytics or advertising, and it loads nothing from other sites. It is hosted by Cloudflare, which, like any web host, handles your IP address and ordinary request information to deliver the pages and protect the site, under Cloudflare's privacy policy. If a page fails to load, your browser may send Cloudflare a network error report. The night-vision switch on these pages is not saved anywhere.

Children

Nyx collects no personal information from anyone, including children.

Changes and contact

If this policy changes, the updated version will appear on this page with a new date. Questions: harry.pakhale98@gmail.com.