Our guides explain the ideas behind the tools in plain language, with examples you can actually follow. Use them when you want to understand the answer rather than simply get one.
How we approach these guides: they are written to help with the actual task in front of you. We use examples, point out common mistakes and explain where a simple calculator has limits. If you spot an error or something that needs clarification, please let us know through the Contact page.
Percentages, age, pricing and break-even planning.
QR codes, barcodes, Base64 and file transfers.
Invoices, margins, pricing and practical workflows.
A simple checklist for making printed QR codes easier to understand and more useful for people who cannot or do not want to scan them.
Read the guide →A simple pre-print checklist to reduce the chance of distributing a QR code that is difficult to scan or points to the wrong place.
Read the guide →A straightforward guide to creating a QR code, checking that it works and using it on posters, menus, documents and other everyday materials.
Read the guide →