Privacy
Last updated 22 October 2026. This page covers Fillbook at peakappsstudio.com/fuelio-viewer and its Polish page.
Your log stays on your device
When you choose a Fuelio CSV file (or a zip with CSV files in it), this page reads it in the same browser tab: the vehicle, the fill-ups, the cost categories and the costs. Nothing from the file is sent to a server, ours or anyone else’s, and nothing is stored: closing or reloading the tab discards it. The PDF history book and the CSV are made in the tab and saved straight to your device.
Fillbook only reads. It never changes your file and never writes a new Fuelio file.
What the page does send
- The Pro license check. When you paste a license key, the page sends that key and the product’s number to Gumroad’s license check (api.gumroad.com) and keeps the answer in your browser’s local storage, so Pro stays on. It checks again in the background once a week. Nothing from your log goes with it.
- Visit counts. We count page visits with Cloudflare Web Analytics, which uses no cookies and no personal data. It never sees your files.
- Buying Pro. The buy button opens Gumroad, which handles payment under its own privacy policy. We get your email address and the purchase from Gumroad, to answer questions and refunds.
Fuelio
Fillbook never connects to Fuelio, Sygic, Google Drive or Dropbox and never asks for a login. It is not affiliated with Fuelio or Sygic.
Contact
Peak Apps Studio, info@peakappsstudio.com.