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Download the app

Simply point your camera at the QR code

or tap the button, and your phone

will take care of the rest. 

OR

CSB is a secure, minimalist budgeting app designed to replace spreadsheets and notebooks. Based on the zero-based budgeting method, it helps you give every euro a job—so nothing is wasted, and everything is intentional.

CSB is for people who want a simple, ad-free experience. No bank syncing. No upsells. Just clear budgeting that puts you in control. If you've been using spreadsheets or budgeting by hand, CSB is your next logical step.

Start free for 7 days. Then choose a simple, affordable plan:

  • €2.99/month
  • €32.99/year

No—and that’s by design. CSB does not sync with your bank. Your financial data stays private and local to your device. Less risk. More control.

You can budget in any currency. The app is currently in English, with more languages coming soon.