Privacy Policy
Last updated 23 August 2026
Night Logic has no accounts, no sign-in, no analytics, and no advertising. It does not have a server of its own. Almost everything the app knows about you lives in storage on your iPhone and never leaves it.
The short version. Your observing location and your equipment are saved on your device. Your coordinates are sent to a weather service so the app can fetch a forecast for where you are. Purchases are handled by Apple and by RevenueCat, our subscription provider. That is the whole list. Nothing is sold, rented, or used for advertising.
1. Who we are
Night Logic is an iOS application published by William Dutton (“we”, “us”). This policy explains what the app does with information when you use it. It applies to the Night Logic iOS app and to this website.
This website is a static marketing site. It sets no cookies, runs no analytics,
and has no login. It does load a web font from Google Fonts, which means Google
receives your IP address and browser user-agent as part of that request; if you
would rather that not happen, blocking fonts.googleapis.com leaves
the site fully readable in a system font.
2. What stays on your device
The app stores the following in local storage on your iPhone. None of it is transmitted to us, because there is nowhere for it to be transmitted to.
| What | Why the app keeps it |
|---|---|
| Observing location Label, latitude, longitude, time zone, and any Bortle override you set |
Every calculation — what is above the horizon, when it peaks, how dark the sky gets, which forecast to fetch — is derived from this. |
| Equipment configurations Telescopes, binoculars, mounts, cameras, sensor formats, filters, and any custom specs you enter |
Scores, framing previews, and exposure plans are all computed against your specific rig. |
| App state Whether you have completed setup, and the night you have selected |
So the app does not walk you through onboarding every time you open it. |
This data is written using the operating system’s standard app storage. It is covered by your device’s encryption, is not shared with other apps, and is removed when you delete Night Logic.
3. Location
When the app asks for it
Night Logic requests location access only when you tap Use my location. It uses the “while in use” permission — it never requests background location, and it does not track you over time. If you decline, the app works normally; you search for a town or site by name instead, and it starts from a default location until you pick one.
What happens with your coordinates
Your coordinates are used in three ways:
- On your device, to compute target positions, altitudes, rise and set times, dark-sky windows, moon phase, and the exposure math. This never touches the network.
- Sent to Open-Meteo, rounded to four decimal places, to retrieve the weather forecast for your observing site, and to turn a place name you search into coordinates.
- Sent to Apple’s geocoding service, via the operating system, to turn the coordinates from “Use my location” into a readable place name to show you.
We do not receive, log, or store your coordinates — those requests go from your phone directly to those services.
4. Services we send data to
Night Logic uses three external services, and no others.
| Service | What it receives | What it is for |
|---|---|---|
| Open-Meteo open-meteo.com |
Your observing coordinates and time zone, or the place name you typed into search. Your IP address, as with any web request. | Cloud cover, temperature, wind, humidity, precipitation probability, and sunrise/sunset for tonight and the nights ahead; converting searched place names into coordinates. |
| Apple apple.com/legal/privacy |
Coordinates for reverse geocoding; App Store purchase and subscription information. | Turning coordinates into a place name; processing and billing all purchases. |
| RevenueCat revenuecat.com/privacy |
A randomly generated anonymous app user ID, your App Store purchase receipt, and basic device and app metadata such as OS version and app version. | Determining whether your device has an active Pro entitlement, and restoring purchases across your devices. |
The RevenueCat identifier is generated on your device and is not linked to your name, email, or Apple Account by us. We use it for one thing: to know whether to unlock Pro features.
5. What we do not collect
To be explicit, Night Logic does not include and does not use:
- Any account system, sign-in, or user profile.
- Any analytics or crash-reporting SDK.
- Any advertising network, ad identifier (IDFA), or App Tracking Transparency prompt.
- Any cross-app or cross-site tracking, fingerprinting, or data brokerage.
- Your contacts, photos, microphone, camera roll, calendar, or health data.
- Background location.
We do not sell or share personal information, and we do not have any personal information of yours to sell or share.
6. Purchases and subscriptions
Night Logic Pro is available as a monthly subscription, a yearly subscription, or a one-time lifetime purchase. All payments are processed by Apple through the App Store. We never see your payment method, card details, billing address, or Apple Account credentials.
Apple provides a purchase receipt to your device, which is validated through RevenueCat to determine your entitlement. Manage, change, or cancel a subscription in Settings › your name › Subscriptions on your iPhone. Refunds are handled by Apple.
7. Retention and deletion
Because we do not operate a server or a database, we hold nothing to retain. Data stored by the app on your device is kept until you change it or remove it.
- To delete everything the app stored: delete Night Logic from your iPhone. This removes your saved location, all equipment configurations, and all app state.
- To revoke location access: go to Settings › Privacy & Security › Location Services › Night Logic.
- For purchase records: subscription and receipt history is held by Apple and by RevenueCat under their own policies and retention schedules. Contact us and we will pass along any deletion request we are able to action.
8. Your rights
Depending on where you live, you may have rights to access, correct, delete, or port your personal data, and to object to certain processing — for example under the GDPR in the EEA and UK, or the CCPA/CPRA in California.
In practice those rights are already satisfied by how the app is built: the data is on your device, under your control, visible and editable inside the app, and deleted when you delete the app. For anything held by Apple or RevenueCat, direct the request to them, or write to us and we will help where we can. You may also lodge a complaint with your local data protection authority.
Where the GDPR applies, our legal basis for the limited processing described above is legitimate interest in providing the app’s core function, and, for location, your consent — which you can withdraw at any time in iOS Settings.
9. Children
Night Logic is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us with personal information, contact us and we will act on it.
10. Changes to this policy
If this policy changes, the updated version will be posted on this page with a new date at the top. Material changes — for instance, if the app ever began collecting something new — will also be noted in the app’s App Store release notes.
11. Contact
Questions about privacy, or a request you would like actioned: wdutton04@gmail.com.