Privacy
Last updated: Nov 8, 2026
This app is a simulation for study purposes. It is not accounting, tax, financial or legal advice. The numbers are not a promise of results. Before deciding to open a business, talk to an accountant and, if needed, a lawyer.
Summary
The app has no sign-up, does not ask for an email or a login, and does not send what you type to any server.
Your calculations stay on your device only. We do not see this data.
We use no cookies and no ads. We count visits anonymously (see "Visit counting").
This policy follows the EU General Data Protection Regulation (GDPR). It also cites the Brazilian General Data Protection Law (LGPD), which applies to visitors from Brazil.
What is stored on your device
Calculation history: what you answer in the step-by-step flow (city, style, values, the name you give your cafe) and the result. We keep up to 50 calculations so you can come back to them. It is kept in your browser local storage (localStorage).
Language and theme: your choice of language (Portuguese or English) and of theme (light, dark or automatic). They are kept only in your browser local storage (localStorage), under the keys "cafeteria-calculator:lang" and "cafeteria-calculator:theme", and are never sent to any server.
The language also comes from the address: pages in English start with /en (for example, /en/privacy). If your saved choice is English, opening the home page (/) takes you to /en. The app does not read your browser language.
Addresses: this policy lives at /en/privacy (in Portuguese, /privacidade), and the other pages also have their own addresses. Old links with "#" are converted in your browser. Nothing new is collected because of this.
A copy of the app files (offline mode cache), so it opens without internet. It holds none of your data.
This is stored because you use the app. It is needed for the history to work, so we do not ask for consent in a banner.
Do not type other people's data, or your own personal data, in the cafe name. Use a made-up name.
Who delivers the site (processors)
To deliver the page, the operator receives your IP address and technical data from your browser, and may keep access logs for security and operation.
Cloudflare, Inc.: hosting and delivery of the site. Data: IP address and request headers. Country: United States (network with servers in several countries). Legal basis: GDPR art. 6(1)(f) (legitimate interest in delivering the site securely); LGPD art. 7, IX. Log retention: Period not published by Cloudflare for this plan.
International transfer: yes. Data processed by Cloudflare, Inc. may leave Brazil or the European Economic Area. Cloudflare, Inc.: Cloudflare transfers data to the United States on the basis of the EU-U.S. Data Privacy Framework (and its extensions for the United Kingdom and Switzerland). If that framework stops applying, it relies on Standard Contractual Clauses (SCCs). For other countries, it uses safeguards suited to the law of the country of origin. Source: Cloudflare privacy policy, section 7, and the Cloudflare Data Processing Addendum (DPA) (cloudflare.com/cloudflare-customer-dpa).
The fonts of the app come from the app itself. The only script from another site is the visit counting one.
The sources page has links to third-party sites. If you tap them, the privacy policy of each site applies.
Visit counting
We count visits anonymously with Cloudflare, Inc. (Cloudflare Web Analytics). We measure: pages visited, country, device type, browser, operating system, referring site and page load performance. We do not know who you are.
The tool does not use cookies and does not store anything on your device, and Cloudflare states that it does not fingerprint visitors. To work, your browser loads a small script from Cloudflare.
Legal basis: GDPR art. 6(1)(f) (legitimate interest in knowing whether the app is used and loads fast); LGPD art. 7, IX.
How to object: write to [email protected] or block the script in your browser (a tracker blocker does it). The app works the same without it.
Who is responsible
Data controller: Matheus Correia (natural person).
Contact for privacy matters: [email protected].
We do not have your history. But if you write to us, we answer any request about your data.
Your rights
You can ask for: confirmation of what we process, access, correction, erasure, portability, information about who we share data with, and to withdraw consent (GDPR, arts. 15 to 21; LGPD, art. 18).
The history data is with you. Use the buttons below to download a copy or delete everything, at any time, without contacting us.
If you think your data was handled wrongly, you can complain to the data protection supervisory authority of your country in the European Union, or to the ANPD (Brazil).
Children
The app is made for people thinking of opening a cafe. It is not directed at people under 18 and does not collect data from anyone.
Changes
If this changes, we update this page and its date. Last updated: Nov 8, 2026.
Your data on this device
Saved calculations: 0.