Privacy Notice

Effective date: February 10, 2026

This Privacy Notice applies to all apps published by Mateusz Siatrak and listed on apps.siatrak.com. App-specific details are listed in the anchored sections below.

1. Data controller

Mateusz Siatrak is the controller for personal data processed through these apps. For privacy requests, use the support form.

2. Data that may be processed

• Purchase and subscription metadata handled through Apple billing.
• Feature usage data required to run and improve app functionality.
• User-provided content, such as prompts, ingredient text, or interview inputs.
• Diagnostics and security telemetry for reliability and abuse prevention.

3. How data is used

• Deliver core app features and responses.
• Validate purchases, credits, subscriptions, and entitlements.
• Prevent abuse and troubleshoot technical issues.
• Comply with applicable legal obligations.

4. Third-party services

Apps may rely on Apple APIs, cloud infrastructure, AI inference providers, and analytics tools. These providers process data under their own privacy policies and contractual controls.

5. Retention and rights

Data is retained only as long as necessary for service delivery, compliance, and dispute resolution. Depending on your location, you may have rights to access, correct, delete, or restrict processing.

6. App-specific details

MuseCraft

• Only playlist prompt content is sent to AI services to generate suggestions.
• Apple Music listening history is not sent to AI services.
• Apple Music matching and save actions use Apple Music APIs and your account permissions.
• Free credits and paid credit/Pro features require transaction and entitlement checks.

Healthy Or Not

• Ingredient text from scans or manual input is processed for classification and scoring.
• Camera permission is used only for on-device label capture when granted.
• Subscription status is verified through Apple purchase data.

Coach Me Up!

• Career prompts and interview inputs are processed to generate coaching responses.
• Usage events may be retained to enforce free limits and paid access rules.

Percentage Calc - QuickDiff

• The calculator is designed for minimal data processing.
• Diagnostics are limited to reliability and crash investigation.

Carbon Watch UK

• The app processes data needed to display UK carbon intensity forecasts.
• Optional alerts and location-related features request explicit device permissions.

7. Changes to this notice

This page may be updated periodically. The current version and effective date are always published here.