SunlinePrivacy Policy
Last updated: 1 October 2026
Sunline (la.marsave.sunline) is an Android live wallpaper that shows a part of the world you choose, lit by the real sun. This policy covers the Sunline app and this website. It explains the small amount of data Sunline needs to work, what happens to it, and how to have it deleted.
Sunline is made by Sergiu Marsavela, an independent developer, who is responsible for this data (“I” and “me” below). You can reach me at sunline [at] marsave.la.
- No account, no sign-up, no ads, no analytics, no tracking SDKs.
- No location. You choose the region by hand. Sunline never asks for location permission.
- The app talks to one server, the Sunline image service, to download the wallpaper. It identifies itself with a random install ID that isn't linked to you.
- Unless you buy Pro, the server keeps nothing linked to your install. Its access logs are deleted after about two weeks.
- Data is shared only with Google, to check the app is genuine and to handle purchases. It is never sold.
What the app sends, and why
All of this goes to the Sunline image service at daynight.sdmn.eu, which I operate, over HTTPS only.
| Data | Why |
|---|---|
| Random install ID | A random identifier (UUID) the app creates the first time it runs. It identifies this installation during a session, so the server can limit how many images one installation requests. It isn't derived from, or linked to, your name, email, Google account, advertising ID or device hardware IDs. |
| Google Play Integrity token | Google Play's proof that the request comes from a genuine copy of Sunline installed from Google Play, so the images can't be scraped by other apps. The server passes it to Google to verify, then discards it. |
| Chosen region and screen size | The longitude, latitude, zoom and pixel size of your wallpaper, so the server can crop the image to fit your screen. This is the area you picked to look at, not where you are. |
| Purchase token and order ID (Pro only) | Sent only if you buy Sunline Pro, to verify the purchase with Google Play and unlock Pro features. |
| IP address | Seen by the server as part of any internet connection. Used only in access logs, as described below. |
What's kept on the server, and for how long
- If you don't buy Pro: nothing linked to your install ID is stored. Sessions are signed tokens that the server checks without a database, and your install ID is never written to logs.
- If you buy Pro: the server stores your install ID, the purchase token, the Google Play order ID and when they were recorded, so Pro keeps working. These are kept for as long as you have Pro, or until you ask me to delete them.
- Access logs: the web server in front of the image service records the IP address, time and request line of each request, for security and to diagnose problems. The request line includes the region and screen size, but not the install ID. These logs rotate daily and are deleted automatically after about two weeks.
- Image cache: cropped images are briefly cached in the server's memory, without any identifier, and cleared every time a new frame is rendered (every five minutes).
What stays on your phone
The install ID, the current session token, your settings (including your chosen region) and the most recent wallpaper image, so Sunline keeps working offline. Only your settings are included in Android backups and device-to-device transfers. The install ID, session and images are excluded, so a restored phone gets a fresh identity. Uninstalling Sunline removes all of it.
Who the data is shared with
- Google, for app integrity. The Play Integrity token is sent to Google's Play Integrity API to confirm the app is genuine and installed from Google Play.
- Google, for purchases. Payments are handled entirely by Google Play. I never see your payment details. To unlock Pro, the server checks the purchase token with the Google Play Developer API.
- Google Play statistics. If you've allowed your phone to share usage and diagnostics with Google, Google Play may give me anonymous, aggregated crash and performance statistics. The app itself contains no crash reporting or analytics code.
Google's handling of this data is covered by Google's Privacy Policy. Apart from that, nothing is shared with anyone. Your data is never sold, rented or used for advertising. I would only disclose it if required by law.
What Sunline doesn't collect
Location, contacts, photos, files, messages, your name, email or Google account, the advertising ID, device hardware identifiers, browsing activity, crash logs and analytics events.
The app asks for one permission:
| Permission | Why |
|---|---|
INTERNET | Download wallpaper images. Granted automatically; no prompt. |
BIND_WALLPAPER | Not a permission Sunline requests from you. It protects Sunline's wallpaper service so that only Android itself can run it. |
Legal basis
Where data protection law requires a legal basis, such as the GDPR, the install ID, integrity check, region, screen size and access logs are processed on the basis of legitimate interests: delivering the wallpaper, preventing abuse and keeping the service secure. Purchase data is processed to provide the Pro features you bought.
Your choices and rights
- Delete everything on your phone: uninstall Sunline, or clear its storage in Android settings.
- Delete server-side data: email me and I'll delete everything linked to your install or purchase. If you bought Pro, include your Google Play order number (it starts with
GPA.) so I can find it. Deleting purchase data means Pro has to be restored again from Google Play. - Other requests: depending on where you live, you may have the right to access, correct or delete your data, to object to its use, and to complain to your local data protection authority. Email me and I'll reply within 30 days.
Children
Sunline isn't directed at children and doesn't knowingly collect personal data from them.
This website
sunline.marsave.la uses no cookies, analytics or third-party scripts, and its fonts and images are served from the site itself. The map on the home page is drawn in your browser and nothing you do with it is sent anywhere. The site is hosted on GitHub Pages, which may log visitors' IP addresses for security. See the GitHub Privacy Statement.
Changes
If this policy changes, the new version will be posted here with a new date. If a change affects what the app collects, it will also be noted in the app's release notes on Google Play.
Contact
Questions or requests about privacy: sunline [at] marsave.la