SabbaPlanLast updated November 4, 2026.
Free browser calculator
On sabbaplan.com, calculations run on your device. The figures and scenarios you enter stay in the open tab. Refreshing or closing the calculator clears your changes. No account is required. The calculator does not send the values to MostDev or store them in cookies or browser storage.
On your Mac
SabbaPlan stores your plan, financial entries, recorded balances, projects, reflections and decisions in local app storage. You do not need an account. The app contains no ads, tracking or usage analytics. MostDev cannot remotely access your journal.
Archives and copies
You choose where to save exports. A JSON archive contains your entire plan. CSV and Markdown files may also contain personal information. If you save a file in a shared or synchronized folder, your settings for that folder determine who has access and which storage provider processes it.
Before replacing an existing plan, SabbaPlan creates a local backup. You manage your own exports and copies. Open the app’s settings to locate its storage folder in Finder.
Support and this website
MostDev IT Consultancy (Dutch Chamber of Commerce registration 73780367) is responsible for the personal data we process in support requests and website visits. When you email us, we receive your email address, message and any attachments you send. We process requests about using the app to perform our agreement with you. For general enquiries, we rely on our legitimate interest in answering your question. We retain correspondence for as long as needed to handle the request and relevant follow-up questions. A legal obligation or dispute may require longer retention.
Our email provider processes support messages for delivery and storage. Cloudflare delivers and protects this website. It may process technical data such as your IP address, the time of the request and the page requested, in our legitimate interest in providing a working, secure website. Where necessary, processing outside the European Economic Area is subject to safeguards such as an adequacy decision or standard contractual clauses. Cloudflare’s privacy policy.
Cloudflare also provides delivery and security for sabbaplan.com. Browsers can report network errors to Cloudflare to help diagnose connection problems. On the SabbaPlan pages on mostdev.com, Cloudflare also measures page performance, such as loading times. This helps us find slow pages. These measurements do not use tracking cookies or include the financial figures you enter in the calculator. We rely on our legitimate interest in providing fast, reliable pages. We keep technical information only as long as needed to diagnose problems and protect the service. How Cloudflare collects measurements.
When apps are distributed through the Mac App Store, Apple processes data for its own services under its privacy policy and your Apple settings. Apple’s privacy policy.
Questions and your rights
Where applicable, you can request access to, correction, deletion, restriction or portability of personal data we hold about you. You can object to processing based on legitimate interests. Email info@mostdev.com. You control access to and deletion of data held only on your Mac or in your own copies. You may also lodge a complaint with the Dutch Data Protection Authority.