Sidera

How personal data is handled when you use Sidera — Star Battle logic puzzles, one handcrafted challenge a day. In plain terms, then in full.

Last updated 25 July 2026 · Tropp Easy, Udine, Italy

In short

No account, ever. Sidera never asks for your name, email address or password.
Your content stays on your phone. It is never uploaded and we cannot see it.
Analytics and ads only if you say yes. Nothing is collected until you consent, and you can withdraw at any time.
We never sell personal data. Not to anyone, for any purpose.

1) Who is responsible

The data controller is Tropp Easy (Alessio Troppina), independent Android developer, Udine, Italy.
Contact: troppeasy@gmail.com

This policy covers the Android app Sidera (com.trop.sidera), distributed on Google Play.

2) What stays on your device

Sidera needs no registration and, in normal use, collects no identifying information such as your name, surname or address.

The app stores on your device only: app language and theme, sound, music and vibration preferences, game statistics and best times, your daily streak and freezes, saved puzzles in progress, milestones, and the status of the “Sidera Plus” purchase. This data never leaves your device and is not accessible to us.

The app works offline. An internet connection is used only to show ads, to send analytics events if you consented and to verify in-app purchases.

3) Analytics — Google Analytics for Firebase

To understand how the app is used and where it can be improved, Sidera uses Google Analytics for Firebase. Where you have given consent, this service may process:

events describing how the app is used: screens opened, features used, sessions started and ended;
a random installation identifier, generated by the app and not linked to your identity;
device and technical information: model, operating system version, language, country inferred from the IP address;
the estimated value of advertising impressions, so we can tell whether the app can sustain itself.

We do not upload your game content, your progress or anything you write. Analytics data is pseudonymous: it describes an app installation, not a person, and we have no way of connecting it back to you. We do not use it to build advertising profiles.

Legal basis: your consent (Art. 6(1)(a) GDPR). In the EEA, the UK and Switzerland, collection is switched off until you consent and switches off again the moment you withdraw. Outside those regions, collection follows applicable local law.

4) Advertising — Google AdMob

To show ads, Sidera uses Google AdMob (Google Ireland Ltd. for users in the EEA). Depending on your consent choices, AdMob may process:

advertising identifiers, such as the Advertising ID;
your IP address, also used to infer approximate location;
device information: model, operating system, language, network;
ad interaction and diagnostic data: impressions, clicks, performance, troubleshooting.

Details are in the Google Privacy Policy and in how Google uses data from sites and apps that use its services.

If you buy the one-time “Sidera Plus” purchase, no ads are requested at all.

5) Consent, and how to change your mind

In Europe (EEA, UK, Switzerland), consent is collected through the Google User Messaging Platform. On first launch you can accept, refuse, or choose purpose by purpose.

You can change your choice at any time, as often as you like, from Settings → Privacy options inside the app. Withdrawing consent stops analytics collection immediately and switches advertising to non-personalised, within the limits Google's rules allow. You can also reset or delete your Advertising ID in your Android settings.

6) In-app purchases — Google Play Billing

Sidera offers the one-time “Sidera Plus” purchase, which removes ads and unlocks extra features. Transactions are handled entirely by Google Play Billing: we never receive or store your payment details, such as your card number. The app receives only technical purchase information — status and identifiers — so it can unlock what you bought and restore it on a new device.

7) Why we process data, and on what legal basis

Purpose	Legal basis
Running the app and storing your preferences and progress on the device	Performance of the service you requested — Art. 6(1)(b) GDPR — and our legitimate interest in the app working correctly — Art. 6(1)(f)
Analytics: understanding how the app is used and improving it	Your consent — Art. 6(1)(a) GDPR
Advertising and its measurement, which is what funds the free version	Your consent — Art. 6(1)(a) GDPR. Where allowed, non-personalised ads may be shown without consent
In-app purchases and restoring them	Performance of a contract — Art. 6(1)(b) GDPR
Answering support emails	Our legitimate interest in helping you — Art. 6(1)(f) GDPR

8) Sharing and transfers outside the EU

We do not sell personal data and we do not share it with advertising brokers of our own. Processing is carried out by the Google services integrated in the app — Google Analytics for Firebase, Google AdMob and Google Play Billing — each under its own terms.

Those services may process data outside the European Economic Area. Where that happens, transfers rely on the safeguards recognised by data protection law, such as the Standard Contractual Clauses.

9) How long data is kept

On your device: until you uninstall the app, clear its storage, or use the reset option inside the app.
Analytics: deleted automatically after 14 months at the latest, or earlier if you ask.
Advertising: according to Google's own retention policies.
Purchases: kept by Google Play as tax and accounting law requires.
Support emails: only as long as needed to answer you.

10) Your rights, and how to delete your data

Under the GDPR you have the right of access, rectification, erasure, restriction, portability and objection, and the right to withdraw consent at any time.

The practical steps — and exactly what gets deleted and what is kept — are on one page: Delete your data.

For any request, write to troppeasy@gmail.com. We answer within 30 days. You may also lodge a complaint with your supervisory authority; in Italy, the Garante per la Protezione dei Dati Personali.

11) Children

Sidera is not designed for or directed at children under 13. In the EEA, consent requests follow the age requirements of the GDPR. If you believe a child has provided personal data, please contact us and we will remove it.

12) Changes to this policy

If anything changes, we update this page and revise the date at the top. Substantial changes affecting consent will be shown again inside the app.