Privacy Policy

Introduction

This privacy policy explains how Tankday: Aquarium Log processes personal data when you use the app.

What Data We Collect

Device identifier

A pseudonymous identifier generated by the analytics SDK. No account, name, tank data or test values are attached.
Purpose: Measure anonymous product usage and purchase conversion.
Legal basis: Our legitimate interest (Art. 6(1)(f) GDPR)
Data Retention: According to the configured analytics retention period.

Product interaction

Anonymous events for app lifecycle, created tanks (template and number of own tanks), opening the sample tank, saved tests (number of values, whether all were in range), planner views (state), logged water changes (whether the planner suggestion was used) and paywall display. Test values, tank names, notes, volumes and tap water values are never sent.
Purpose: Improve the planner, the first steps in the app and the paid offer.
Legal basis: Our legitimate interest (Art. 6(1)(f) GDPR)
Data Retention: According to the configured analytics retention period.

Purchase history

Product identifier, price, and currency after a verified one-time purchase.
Purpose: Measure paywall-to-purchase conversion.
Legal basis: Our legitimate interest (Art. 6(1)(f) GDPR)
Data Retention: According to the configured analytics retention period.

Feedback content

The category and message a user voluntarily submits, plus app version, build, language, and source screen. The form asks users not to enter personal data.
Purpose: Understand and resolve product problems and requests.
Legal basis: Your consent (Art. 6(1)(a) GDPR)
Data Retention: Until the feedback has been evaluated or deletion is requested.

Your tanks, water tests, water changes, care tasks and notes are stored only on your iPhone. Reminders are local notifications scheduled on your device. We have no server and no access to your aquarium data. Deleting the app deletes this data.

How We Use Your Data

We use collected data only for the stated purposes. We do not sell personal data or use it for advertising or cross-app tracking.

Data Processors and Subprocessors

Data Retention

We keep personal data only as long as needed for the stated purpose or as required by law. The app-specific retention periods, where applicable, are listed above.

Your Rights

Depending on the circumstances, you may have rights of access, rectification, erasure, restriction, objection, withdrawal of consent and data portability. You may also lodge a complaint with a supervisory authority.

International Data Transfers

Where a listed processor transfers data outside the EU or EEA, the applicable safeguards are stated with that processor.

Changes to This Privacy Policy

We may update this policy when legal, technical or functional changes require it. The current version is always available at this address.

Contact

For privacy questions or to exercise your rights, contact:

Controller:
Timothy Krechel
timkrechel@googlemail.com