Privacy policy

Version 3 of 11/11/2026

Kvadrino is an app for working out building materials and writing estimates. This policy explains what the app keeps, what it sends to us and what you can do about it.

Contact for data questions: support@kvadrino.com

Without an account everything stays on your device

The app works without signing up. Until you sign in, everything you enter stays on your phone or computer and never reaches us:

  • jobs, rooms, sizes, calculations, estimates and their versions, shopping lists;
  • your rates, business details and logo;
  • your customers’ details: names, phones, addresses.

A backup is a file you save yourself and keep wherever you choose. The PDF of an estimate is made on the device. You send it yourself, through an app you choose. We don’t receive it.

If you sign in to an account

An account lets you open your jobs on another phone or a computer and keep them when you change phones. You sign in with a code sent to your e-mail, with Google or with Telegram.

What we keep about the account:

  • the e-mail address and the name: with Google or Telegram, the ones they pass to us, with their id of your profile;
  • to protect the sign-in: the devices you signed in from, their IP addresses and the times.

What is kept on the server for sync: everything you keep in the app — jobs, rooms, estimates, rates, business details, logo and the customers’ details you entered. We keep it only so that it is on all your devices. We don’t read it, analyse it or pass it to anyone.

You are the one who enters your customers’ details. Let your customers know that you keep their contacts to work with them.

Where it is kept: on our server in the USA (Los Angeles, Interserver hosting). Backups of the database are kept there too, for up to 6 months.

Sign-in letters with the code are sent by Brevo (France). It receives only the e-mail address and the text of the letter.

Deletion. You can delete the account. After 14 days (you can cancel during them) the account and all sync data are deleted from the server; they leave the backups as those are renewed, within 6 months at most. The data on your devices stays until you delete it yourself. You can also download a copy of all your data.

What the app always sends to us

Updates of material sets. Once a day the app asks kvadrino.com whether new sizes and norms for your region are out, and downloads only what changed. As with any website, our server sees the IP address and the type of device. These are not linked to you and are used only to run and protect the server.

Crash reports and anonymous events. To find and fix errors, the app sends:

  • what happened (a crash or an event) and where in the program;
  • the error message, with every number and e-mail address hidden;
  • the version of the app and the system, the language, the country;
  • a random installation number made on the phone.

The reports contain no sizes, sums, names, phones, addresses and not your IP address, and they are not linked to the account. They are kept for 90 days, then deleted. You can turn them off in More → Settings.

What the app doesn’t have

  • ads or third-party analytics;
  • selling or passing data to anyone.

Your rights

You can find out what data about you we hold, get a copy of it, correct or delete it: in your account at kvadrino.com or by writing to support@kvadrino.com.

Children

The app is made for adult professionals and is not meant for children.

Changes

New editions are published on this page with their date. If a change matters, the app will tell you.

Versions