Courses in the Academy and downloadable workbooks

Choose how you want to work: follow a course or download a ready-made workbook.

Courses cover e-commerce profitability and Data Governance. Excel workbooks help you calculate margin, evaluate campaigns and organise analytics fixes.

See courses and workbooks How delivery works
  • One-time Stripe payment
  • Access or file by email
  • Invoice on request

The shop

Find a product for your task

Use the format filter or enter a topic, for example margin, campaigns or Data Governance.

6 products

Simple digital delivery

From choosing a format to access in three steps

Your card details stay with Stripe. Your business data stays with you.
  1. 01 Choose the format and topic

    Decide whether you need an online course or a ready-made Excel workbook.

  2. 02 Pay securely

    Complete the payment in Stripe; request an invoice if needed.

  3. 03 Activate the course or download the file

    Use the access or download link on the confirmation page and in your email.

Clear terms, no surprises

Questions before you buy

Delivery, data privacy, payments and choosing the right course or workbook - the essentials in one place.

How and when will I receive the product?
Once Stripe confirms the payment, an access or download link appears on the success page and a copy is sent by email. For an academy, the link activates online access to the Polish-language course and its materials. For a workbook, you receive a ready-to-download XLSX file. Check your spam folder if the message does not arrive within a few minutes.
Do I need to upload company or campaign data?
No. The calculators run locally in Excel or LibreOffice Calc, and the course does not require company-data uploads. Stripe receives information required for payment. Invoice details are requested only if you select an invoice.
How can I pay and is the payment secure?
Payments are handled by Stripe. Available methods, including cards, Apple Pay or Google Pay, depend on the buyer's device and country. This site does not store card numbers.
Can I receive an invoice?
Yes. Select the invoice option in the checkout form and provide your company details. The invoice is issued after payment and sent to the email address used for the order.
Which product should I choose?
The E-commerce Profitability Academy covers store economics, margin, costs and growth decisions. The Polish Data Governance course helps organise data sources, metric definitions, quality and ownership. Margin Calculator PRO is for quick price, discount and product-profit calculations. Campaign Calculator PRO calculates break-even ROAS, maximum CPA and CPC.
Is this a one-time purchase, and will I receive updates?
Yes. You pay once and receive the version described on the product page; there is no subscription. Buyers are notified about material updates by email, and each product page explains the update scope.