Privacy Policy for AlcheBlocks
Last updated: 10 November 2026
Who is responsible?
Murat Karaagac
Horpestraße 13
51789 Lindlar
Germany
Email: datenschutz@alcheblocks.de
In short
AlcheBlocks needs no account, no password and no email address. So that your progress is not lost and there can be leaderboards, the game signs you in to Google Firebase anonymously in the background and stores your progress and scores there. We only send anonymous gameplay data and crash reports if you agree. You can withdraw that consent at any time, and "Delete all my data" in the gear menu removes everything we hold about you.
Anonymous sign-in
On first launch, Firebase Authentication creates a random identifier for you. It is not tied to an account, a name or an email address. This identifier links your progress and leaderboard entries to you.
Your progress
The game saves how far you have got: level, essences, lab stations, best score, daily quests, unlocked skins, backgrounds and companions, and your settings. This is stored on your device and, as a backup, in Google Cloud Firestore, so you can keep playing after switching devices or reinstalling. The time of the last backup is stored as well. If there has been no backup for 12 months, the daily clean-up job deletes the progress and everything else linked to your ID, including your anonymous Firebase account.
The legal basis is performance of the contract of use (Art. 6(1)(b) GDPR): without the backup there would be no leaderboards and no transfer to a new device.
Leaderboards
For the leaderboards we store your player name, your in-game profile picture, your badges and your results (best score, weekly ranking, blocks placed, level, moves and points in the daily puzzle). Other players see the name, picture, badges and result. If you have not backed up for 12 months, you disappear from all leaderboards together with your progress.
At first you get a random name such as "Starraven 4821". You can replace it with your own. The game checks self-chosen names with a word filter. Please do not use your real name.
If someone thinks a name on the leaderboard is inappropriate, they can report it. We store the reported name, the identifier of the reported entry and the identifier of the person reporting. We review the report and change or remove inappropriate names.
Transferring your progress to a new device
When you create a transfer code, we store a copy of your progress under that code. The code is valid for 24 hours. If it is redeemed, we delete the copy immediately. If it expires, the game deletes the copy the next time your old device starts it, and a daily clean-up job deletes it the day after at the latest.
Saving with Game Center (iPhone only)
If you choose "Save with Game Center", Firebase links your anonymous identifier to your Game Center account. For this, Apple sends a confirmation to Firebase. We do not see your name or your Apple ID. The game also submits your best score to the Game Center leaderboard, where Apple's privacy rules apply.
Sending an idea or reporting a bug
If you use "Send an idea or report a bug" in the gear menu, we store your text, the type of message, your level, app version, platform and language, and your anonymous identifier. We read these messages to improve the game. Please do not include personal information in the text.
Reminders
If you allow reminders, the game schedules them on your device, for example for the daily gift. No data is sent to us or to third parties for this.
Anonymous gameplay data (Firebase Analytics)
After the introduction, the game asks once whether you would like to help with anonymous gameplay data. Only if you agree does the game send data to Google Analytics for Firebase. You can withdraw your consent at any time in the gear menu; from then on nothing more is sent.
We use this to find out where players get stuck, whether rounds are too long or too short, and which parts of the game people enjoy.
What is sent:
- Game events: start and end of a round (type of round, level, points, moves, duration, reason for ending, lines cleared, best combo, essences collected, power-ups used and left over), progress through the introduction, level-ups, quests and gifts claimed, station upgrades, chosen skins and companions, reward videos watched, shop visits and purchases (which item was tapped, whether a purchase was started, cancelled or completed, and its price), changed settings.
- Properties for analysis: your level, chosen skin and companion, number of stations built.
- What Firebase records by itself: a random identifier for this app installation, first open, sessions and their length, device model, operating system and version, app version, language, and a coarse region (country, possibly region) derived from the truncated IP address. The game does not read your device's advertising ID.
We do not send names, contact details or free text to Analytics.
The legal basis is your consent (Art. 6(1)(a) GDPR, Section 25(1) TDDDG). Google deletes the data after 2 months.
Crash reports (Firebase Crashlytics)
This applies only to the iPhone and Android apps; the web version does not send crash reports. If you agreed to anonymous gameplay data, the app sends a report to Firebase Crashlytics after a crash. Without consent it sends none. We use the reports to find and fix bugs.
A report contains the error log, device model, operating system and version, app version and a random identifier for this app installation.
The legal basis is your consent, as for gameplay data. Google keeps the reports for 90 days and then starts deleting them (as stated on Firebase's privacy page; check before publishing: https://firebase.google.com/support/privacy).
Provider and transfers to the USA
All Firebase services mentioned (Authentication, Firestore, Analytics, Crashlytics, Hosting) are operated on our behalf by Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. Data may be transferred to Google LLC in the USA. Google is certified under the EU-US Data Privacy Framework; the European Commission's standard contractual clauses also apply.
Web version
The web version is hosted on Firebase Hosting. When you open it, the server stores technically necessary information such as IP address, time, requested file and browser in order to deliver the page and detect abuse. According to Google, this information is kept for a few months.
We serve the Flutter graphics library and the fonts ourselves. For the leaderboard and cloud progress, your browser loads the Firebase libraries for sign-in and storage (www.gstatic.com) and connects to identitytoolkit.googleapis.com and firestore.googleapis.com. In doing so, Google learns your IP address.
Your browser only loads the Google Analytics parts (firebase-analytics.js from www.gstatic.com, gtag.js from www.googletagmanager.com, plus firebase.googleapis.com and firebaseinstallations.googleapis.com) after you have agreed to anonymous gameplay data.
The legal basis is our legitimate interest in offering the game reliably in the browser (Art. 6(1)(f) GDPR).
How long we keep data
Progress and leaderboard entries, including those from past weeks, remain until you remove them with "Delete all my data", or for 12 months after your last backup at most. After that the daily clean-up job deletes them, along with transfer codes and reports carrying your ID and your anonymous Firebase account. The daily clean-up job deletes daily puzzle entries on its own after 7 days. We delete ideas, bug reports and reported names once they have been dealt with. After 12 months at the latest, the daily clean-up job deletes them.
Your rights
You have the right of access, rectification, erasure, restriction of processing, data portability and objection. You can withdraw consent at any time with effect for the future, in the game via the gear menu.
You can delete your data yourself: gear menu, "Delete all my data". This removes your progress, leaderboard entries, an open transfer code and your anonymous sign-in on our side, and resets the game on your device. For anything else, write to datenschutz@alcheblocks.de. Because the game has no account, please tell us your player name from the leaderboard so we can find your data. Step by step: https://alcheblocks.de/delete/
You also have the right to lodge a complaint with a data protection supervisory authority.
Later: ads and purchases
Rewarded videos (Google AdMob) and purchases in the App Store and on Google Play are not built in yet. When they arrive, we will update this policy before the new version is released.
Changes
If the game gets new features that affect data, we will update this policy. The version with the latest date applies.