CloudEx Inc. ("we", "us", or "our") operates the "Constellation Finder Pro" app (the "Service"). This Privacy Policy explains what information we collect, how we use it, and the choices available to you. By using the Service, you are deemed to have agreed to the practices described in this Policy.
1. Our Core Principle
Constellation Finder Pro is a star map: point your phone at the sky to see the names of the stars, constellations, planets, and satellites in front of you. The positions of the stars, the Sun, the Moon, the planets, comets, and satellites are all calculated on your device. There is no account and no sign-up. Your location, your observing lists and logs, and what you look at in the app stay on your device, and we never view, collect, upload, or transmit them to our servers. Specifically, we do not have access to any of the following:
- Your location, or the observing sites you save
- The camera image shown in the AR camera view (it is not recorded or saved)
- Your favorites, observing lists, observing log, and equipment
- The objects you search for or look at, and the notifications you set
- The address of the telescope mount you connect to
2. Location, Camera, Sensors, and Telescopes
- Location: The app uses only your approximate location (ACCESS_COARSE_LOCATION), because a star map does not need more than that. It is used to calculate which part of the sky is above you, and when the Sun, the Moon, the planets, and satellites rise and set where you are. Location is read only while the app is open — when you open it with “Use this device's location” turned on, or when you update your location — and it is never read in the background. If you do not allow location, you can pick a city from the list built into the app, or the app uses a representative city for your device's time zone. The observing site in use is stored only on your device.
- Camera: Used only for the AR camera view, which shows the star map on top of the camera image, and only while that view is turned on. The camera image is shown on the screen and is never recorded, saved, analyzed, or sent anywhere. The camera is released as soon as you turn the view off or leave the sky screen.
- Motion sensors: The compass, accelerometer, and gyroscope are used to follow the direction you point your phone. The sensor readings are used on the spot and are not stored or sent.
- Telescope control (Premium): When you connect to a telescope mount, the app talks to it over your Wi-Fi network using the IP address and port you enter, and exchanges only pointing information with it: the coordinates of the object you choose to go to or sync on, the direction buttons you press, and the position the mount reports back. The address you enter is stored only on your device.
3. Information We Collect
3.1 Information Collected Automatically
- Crash reports: Via Firebase Crashlytics. When the app crashes, we collect the stack trace, device model, OS version, app version, and a random identifier created for the app installation. This does not include your name, your location, or your observing data. We use crash reports only to find and fix problems.
- Purchase information: We use purchase tokens issued by Google Play to verify your one-time "Premium" purchase. We never receive any payment information such as credit card numbers.
- Orbit data for satellites and comets: To keep the positions of satellites and comets accurate, the app downloads their latest orbital elements from public sources — CelesTrak (celestrak.org) for satellites and the IAU Minor Planet Center (minorplanetcenter.net) for comets — every few days. The request contains no personal data; it only identifies the app and its version. As with any request to a web server, those servers receive your device's IP address as part of the connection.
- List of our other apps: To show our other apps, the app downloads their names, descriptions, and icons from our content server (static files hosted on Cloudflare Pages). The request contains no personal data from the app. As with any request to a web server, the server receives your device's IP address as part of the connection. Tapping an app in the list opens its page on Google Play.
3.2 Information Stored Only on Your Device
- Observing site: The location in use (your current location, a city you picked, or a site you saved) and its name.
- Favorites, observing lists, and observing log: The objects you save and the notes you write, including the time, place, and conditions of each observation. They are used only to show them back to you in the app. A CSV file of your observing log is created only when you export it, and goes only where you save it.
- Equipment and settings: Your equipment (telescopes and eyepieces, binoculars, and cameras, with their fields of view), the telescope mount address, display options, notification settings, and similar settings.
- Notifications: Reminders for sky events and satellite passes are calculated and scheduled on your device. No notification is sent from our servers.
- Home screen widgets: The Tonight and Moon widgets are drawn on your device from the same calculations as the app.
- Android backup: If backup is turned on in your device settings, Android may include the app's settings, observing site, favorites, observing lists, and observing log in the backup it saves to your own Google account, and may copy them to a new phone when you transfer your data directly. This is handled by Android; we have no access to it.
- When you uninstall: Uninstalling the app or clearing its data deletes everything stored in the app on your device.
3.3 Information We Explicitly Do Not Collect
- Your location or the observing sites you save
- Camera images
- Your favorites, observing lists, observing log, and searches
- Your name, email address, phone number, or contacts (the app has no account or sign-up)
- Your device's advertising ID, or usage analytics
- The contents of your screen or of other apps
3.4 Permissions the App Requests and Their Purposes
- Approximate location (ACCESS_COARSE_LOCATION) — Calculates the sky above you, and the rising and setting times where you are. Read only while the app is open. You can use the app without it by choosing a city.
- Camera (CAMERA) — Shows the star map on top of the camera image in the AR camera view. Used only while that view is on. Nothing is recorded or saved.
- Notifications (POST_NOTIFICATIONS, Android 13+) — Lets you know about sky events (such as eclipses, meteor showers, and conjunctions) and satellite passes that you have chosen to be notified about.
- Run at startup (RECEIVE_BOOT_COMPLETED) — Schedules your notifications again after your phone restarts, because Android clears them on restart.
- Internet (INTERNET) and network state (ACCESS_NETWORK_STATE) — Used only for downloading orbit data for satellites and comets, connecting to a telescope mount on your Wi-Fi network, crash reports, Google Play purchase verification, in-app reviews and in-app updates, downloading the list of our other apps, and showing this privacy policy in the app. The star map itself works without an internet connection.
- Google Play billing (BILLING) — Lets you buy Premium through Google Play.
4. How We Use Information
The limited information we collect is used only for the following purposes:
- Operating and maintaining the Service
- Verifying your Premium purchase
- Diagnosing and fixing crashes
- Responding to support inquiries
- Complying with applicable laws
5. Third-Party Services
Constellation Finder Pro uses the following third-party services. Each service has its own privacy policy.
- Firebase Crashlytics (Google LLC) — crash diagnostic data
- Google Play Billing (Google LLC) — the one-time Premium purchase; payment is completed on Google Play, and we receive only a purchase token
- Google Play In-App Review and In-App Updates (Google LLC) — let you rate the app and install updates without leaving it; handled by Google Play
- CelesTrak and the IAU Minor Planet Center — public sources of orbital elements for satellites and comets
- Cloudflare Pages (Cloudflare, Inc.) — hosts the static list of our other apps
Constellation Finder Pro does not display ads within the app and does not share your data with advertising networks.
6. Data Retention
- Crash reports: retained for 90 days, then deleted.
- Support emails: retained for 12 months after the last reply, then deleted (except where legally required).
- Your observing site, favorites, observing lists, observing log, and settings on your device: kept until you delete them, uninstall the app, or clear the app's data.
7. International Data Transfers
We are based in Japan. The infrastructure used for crash diagnostics, orbit data, and hosting the list of our other apps may be located in various countries. When you use the Service, the minimal information described above may be processed outside your country of residence under standard contractual safeguards.
8. Your Rights
Depending on where you reside (e.g., the EEA, UK, California, Japan), you may have the right to request access to, correction of, or deletion of the limited information we hold. You can:
- Withdraw the location, camera, or notification permission in your device settings at any time
- Delete favorites, observing lists, log entries, and saved sites in the app at any time, or uninstall the app or clear its data to erase everything stored on your device
- Contact us at the address below to make a request regarding the information we hold
9. Children's Privacy
Constellation Finder Pro is not directed to children under the age of 13 (or the minimum age applicable in your region). If we inadvertently collect information from such a child, we will delete it promptly upon being contacted.
10. Changes to This Policy
This Privacy Policy may be updated from time to time. The latest version is always published at this URL together with its effective date. We will also notify you within the app of significant changes as appropriate.
11. Contact
For questions about privacy, data requests, or to report concerns, please email us at .
CloudEx Inc. (Japan)
Effective Date: October 19, 2026