Privacy policy

Your data stays yours

The short version: no account, no tracking by default, nothing sold, ever. Our games work offline and keep your progress on your own phone.

Last updated: 14 November 2026

1. Summary

WhatDefaultOnly if…
Game progress & settingsStored on your device only—
Account / sign-inNone—
Play statistics (analytics)Offyou switch them on in Settings
Video adsNever shown on their ownyou tap the in-game offer (e.g. the owl)
Personalized adsOffyou consent in the consent screen
PurchasesHandled by Apple / Googleyou buy something
Selling your dataNever.

2. Who is responsible

Sergiu Cetulean, operating as Cetulean Games
Via Franco Zorzi 27, 6900 Paradiso, Switzerland
Email: support@cetulean.com

We follow the Swiss Federal Act on Data Protection (FADP/nDSG) and, for players in the EU/EEA and UK, the General Data Protection Regulation (GDPR).

3. Data in our games

3.1 Stored on your device

Your progress, soft currency, collections and settings are saved locally on your phone. We cannot see them. They're deleted when you uninstall the game.

3.2 Purchases

Payments are processed entirely by Apple (App Store) or Google (Google Play). We never see your name, payment card or address. To unlock what you bought and to restore it on a new device, we receive a purchase record from the store (product, date, country, price, and a random app user ID), handled through our purchase service provider (see section 5). Legal basis: performance of a contract (GDPR art. 6(1)(b)).

3.3 Optional rewarded videos

Some games offer an optional short video in exchange for an in-game gift. Videos are provided by Google AdMob and are only requested when you choose to watch one. When a video loads, Google processes device and usage data such as IP address, device type, OS version and, only if you allow it, an advertising identifier.

  • In the EU/EEA, UK and Switzerland, we ask for your choice through Google's consent screen before any ad is shown. You can change your choice anytime in the game's settings.
  • On iPhone, we only use the advertising identifier if you allow tracking in Apple's prompt. If you decline, the game still works fully and ads are non-personalized.

Legal basis: your consent (GDPR art. 6(1)(a)) for personalized ads and identifiers; legitimate interest (art. 6(1)(f)) for serving a non-personalized video you asked for.

3.4 Optional play statistics

Switched off by default. If you switch them on (Settings → "Share anonymous play data"), the game sends pseudonymous gameplay events, such as "level 12 completed in 80 seconds using 1 hint", to Google Analytics for Firebase, together with a random app-instance ID, device model, OS version, app version and approximate country. We use this only to find levels that are too hard and to fix bugs. We set data retention to the shortest available period (2 months). Legal basis: your consent (GDPR art. 6(1)(a)). Switching it off stops collection immediately.

3.5 Support emails

If you email us, we use your email address and message to answer you. We delete support conversations 12 months after they're resolved. Legal basis: legitimate interest (art. 6(1)(f)).

4. Starthread: game-specific details

FeatureDataShared with
Progress, Stardust, constellations, settingsOn device onlyNobody
Owl gift (rewarded video, optional)See 3.3Google AdMob
Supporter Pack & lantern tipsSee 3.2Apple / Google, RevenueCat
"Share anonymous play data" (off by default)See 3.4Google Analytics for Firebase
Daily SkyGenerated on your phone from the date. Nothing is sentNobody

Other games will be listed here before they're released, with the same level of detail.

5. Service providers

  • Apple Inc. and Google LLC / Google Ireland Ltd.: app distribution and payments (their own privacy policies apply).
  • RevenueCat, Inc. (USA): purchase validation and restore. Privacy policy
  • Google AdMob: optional rewarded videos. How Google uses data in ads
  • Google Analytics for Firebase: optional, opt-in play statistics. Firebase privacy

They act as our processors or as independent controllers for their own services. We don't use any other trackers.

6. International transfers

Some providers process data in the USA. Transfers rely on the EU–US and Swiss–US Data Privacy Framework where the provider is certified, or on the European Commission's Standard Contractual Clauses (recognized by the Swiss FDPIC) otherwise.

7. Children

Our games are made for all ages but are not directed specifically at children. We don't knowingly collect personal data from children under 13 (or under the age set by your country). Analytics is off and ads are non-personalized unless consent is given. If you believe a child has shared personal data with us, email us and we'll delete it.

8. Your rights

You can ask us for access to, correction of, or deletion of your personal data. You can also object to processing, ask for a copy in a portable format, and withdraw consent at any time (in-game settings or by email). Write to support@cetulean.com. Because we don't run accounts, please tell us which game and, if possible, the approximate date of a purchase or message so we can find the right data.

You may also complain to a supervisory authority: in Switzerland the Federal Data Protection and Information Commissioner (FDPIC), or the data protection authority in your EU country.

9. This website

games.cetulean.com uses no cookies, no analytics and no third-party content. Fonts are hosted on our own server. Like every web server, ours briefly keeps technical logs (IP address, date, page, browser) for security. These logs are deleted after 14 days.

10. Changes

If we change how our games handle data, we'll update this page and the date at the top before the change takes effect. Important changes will also be noted in the game's update notes.