Sky Clock
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Privacy Policy

For the Sky Clock app and skyclockapp.com · Last updated 23 October 2026

The short version. There is no account, no advertising, and no tracking of you across other apps or websites. Sky Clock does record anonymous usage analytics, and recordings of what happens on screen, so the developer can see where the app is confusing. Both are tied to a random device id rather than to you, and the parts of the screen that could identify you — your place name, your coordinates, your notes and your photos — are hidden before a recording leaves your phone. Your location is used on your device to work out what is above you, and it is never sent to us. Some of the onboarding and subscription screens are delivered by Superwall, which also learns about purchases; none of that carries your name, your place or your coordinates.

Who this is from

Sky Clock is made by Eric Rosenbaum, an independent developer, and published on the App Store under the name Sam Harper. In this policy, "we" and "us" mean the developer, and "the app" means Sky Clock for iPhone and iPad.

What the app uses, and why

Your location

With your permission, Sky Clock reads your device location so it can compute which planets, Moon phase and satellite passes are visible from where you are standing. The calculation happens entirely on your phone. The coordinates are never uploaded to us, logged remotely, or shared with anyone.

If you would rather not share your location at all, you can type in a place by hand, and every feature works the same way. The one exception is described under "Weather" below: to fetch a cloud forecast for a place, that place has to be sent to Apple.

Your observation log

If you subscribe to Sky Clock Plus, the sightings you save — the object, the date, the coordinates, and any note or photo you add — are stored on your device and, if you are signed in to iCloud, mirrored to your own private iCloud database. That database belongs to your Apple Account. The developer cannot see it, and neither can anyone else. Deleting the app, or deleting the entries inside it, removes that data.

Notifications

Alerts are scheduled locally on your device from the same calculations the app already performs. There is no push server, and no device token is registered anywhere.

Usage analytics and session recordings

Sky Clock uses PostHog, an analytics service, to record how the app is used: events such as "a screen was opened", "onboarding finished" or "the paywall was shown", and recordings of what happens on screen during a session. This is how the developer finds out which parts of the app confuse people, and it is used for nothing else.

There is no account and no login, so these are not tied to your name or email. PostHog assigns a random identifier to your installation of the app, which lets one visit be told apart from another. It is not your advertising identifier, it is not shared with anyone, and it is never used to follow you into other apps or websites.

Because a recording captures the screen, everything that could identify you is masked on your device before anything is sent: the place name and coordinates you are using, the notes and photos in your observation log, and everything you type. Your location is never attached to an analytics event. Recordings are deleted after 30 days.

There is no crash reporting service and no advertising identifier in the app.

Onboarding and subscription screens (Superwall)

From version 1.5, some of the screens shown when you first open the app, and the screen that offers Sky Clock Plus, are delivered by Superwall, a service for showing and testing those screens. This lets the developer try different versions of them, for example a shorter introduction or a different trial length, without waiting for an app update. Different people may see different versions.

To do this, the app sends Superwall: a random identifier for your installation (Apple's identifier-for-vendor, which is the same only across this developer's apps and is not your advertising identifier); your device model, iOS version, language, time zone and app version; which of these screens you saw and what you tapped on them; and whether you started a trial or bought a subscription. To personalise the screens it may also send the names and times of the next few things visible in your sky this week, the interests you chose, and how many stars you can see tonight. It never sends your place name or your coordinates. Like any server, Superwall sees the IP address a request comes from, and it may estimate a rough area from it (such as the country, region or nearest city), as most online services can.

Superwall stores this for the developer and uses it only to show these screens and report how they perform. It is not used for advertising and not used to follow you into other apps. See Superwall's privacy policy.

The network requests the app makes

The app makes five kinds of network request and no others.

Purchases

Subscriptions are handled entirely by Apple through the App Store. Sky Clock never sees your payment details, your name or your billing address. Apple tells the developer, through Superwall, when a trial starts, a subscription renews or is cancelled, or a refund is made: which plan, the price, the country, and an anonymous transaction number. None of this includes your name, email or Apple Account, so it cannot be traced back to you.

This website

skyclockapp.com is a set of static pages. It sets no cookies, runs no scripts, embeds no fonts, images or players from other companies, and has no analytics. The company hosting the site keeps standard server logs, which typically include IP addresses and are used only to serve and protect the site.

Data the developer receives

The anonymous usage events and masked session recordings, the onboarding and subscription-screen information from Superwall, and the purchase notices from Apple described above, and nothing else. They arrive under random identifiers, with no name, email, account or location attached, and the developer has no way to work out who any of them belong to. If you email support, the developer will of course see your email address and whatever you choose to write. Those emails are kept only for as long as it takes to help you, and are never used for marketing.

Your rights

Privacy laws including the GDPR and the CCPA give you the right to see, correct, export and delete the personal data a company holds about you, and the right not to have your data sold. We have never sold or shared personal data, and never will. The analytics described above are anonymous: they are not linked to your name, email or account, so there is normally nothing we could look up on request. If you write to the address below within 30 days of using the app and tell us roughly when you used it, we will do our best to find the matching recordings and delete them. Data that lives on your device or in your iCloud account is under your control: you can delete individual log entries, or remove the app and its iCloud data, at any time.

Children

Sky Clock is rated 4+ and contains nothing objectionable. The anonymous usage analytics described above work the same way for everyone and identify nobody, so nothing personal is collected from a child either. We do not knowingly collect personal information from anyone, at any age.

Changes

If this policy ever changes, the updated version will be published on this page and the date at the top will change. If a change is ever significant enough to matter to you, it will be called out in the app's release notes.

Contact

Eric Rosenbaum
ericrosenbaum77@gmail.com