Privacy policy

Last updated: 27 October 2026

In short

Monatsklar collects no personal data, sends nothing and never connects to the internet. This website sets no cookies and uses no trackers.

Controller

Michel Nguyen
Minh Nguyen Studios
Windmühlenstr. 74
07937 Zeulenroda-Triebes
Germany
Email: mip@gmx.biz

The app “Monatsklar – Budget Book”

  • No data transfer: the app has no internet access, no user account, no ads, no analytics or crash reporting and no bank connection.
  • Local storage: everything you enter or import (transactions, accounts, categories, budgets, goals, rules) is stored only on your device – by default in Documents\Monatsklar\Haushaltsbuch.mkb, automatic backups in Documents\Monatsklar\Sicherungen. App settings (e.g. language, theme, last opened book) are kept in Windows' local app data folder.
  • Encryption: optionally protect your book with a password (AES-256). The password is never transmitted and cannot be recovered by us.
  • Export and location: data only leaves your PC if you export it, save a backup, or move the book into a folder synced by a third party (e.g. OneDrive, NAS). That provider's terms then apply.
  • Bank statements: CSV files from your bank are read locally only.

Microsoft Store

Purchase, download, licensing and updates are handled by the Microsoft Store. Microsoft processes data under its own responsibility according to the Microsoft Privacy Statement. We only receive aggregated, anonymous sales and install statistics.

This website

This website uses no cookies, trackers or analytics and loads no external scripts or fonts. Your language choice (DE/EN) is stored only in your browser's local storage and is never transmitted.

Hosting: the website is served by GitHub Pages (GitHub, Inc., 88 Colin P. Kelly Jr. Street, San Francisco, CA 94107, USA). When you visit, GitHub processes technically necessary data such as your IP address, date and time and the requested page to deliver and secure the site. The legal basis is our legitimate interest in reliable, secure delivery (Art. 6(1)(f) GDPR). Data may be transferred to the USA; GitHub is certified under the EU-US Data Privacy Framework. See the GitHub Privacy Statement.

Contacting us by email

If you email us, we use your address and message only to reply (Art. 6(1)(b) or (f) GDPR) and delete them when no longer needed. Please don't send bank statements or financial data.

Your rights

You have the right of access, rectification, erasure, restriction, data portability and objection, and the right to lodge a complaint with a data protection authority. Since the app sends us no data, we hold no data about you apart from emails.