Privacy Policy

Last updated: October 13, 2026

Arithmos runs entirely on your device. Nothing you type ever leaves it.

Data We Collect

Arithmos does not collect, store, or share any personal information. The app requires no account, login, or registration of any kind.

Your Calculations

Words and numbers you enter, and your calculation history, are stored only on your device. They are never transmitted anywhere.

Analytics & Tracking

The Arithmos app contains no analytics, advertising, crash reporting, or tracking of any kind.

Update Check

When the app opens, it makes one request to amirlabs.app to learn the oldest and the recommended version of Arithmos, so it can tell you when an update is available or required. The request carries nothing you typed, no calculation, and no identifier for you or your device; it asks only for those two version numbers. Like any web request it arrives from your network address, which our hosting provider handles to deliver the answer and which we do not store or link to you. If the request fails, the app simply carries on as normal.

This Website

The app collects nothing, but these pages on amirlabs.app are an ordinary website and do measure a little. The support, privacy, and terms pages count page views, roughly how long a page was open, the approximate country the visit came from (derived from the IP address, which we do not store as part of the event), the type of device, and which in-page links were used.

To keep those counts honest across visits, an anonymous random identifier is stored in your browser’s local storage. It contains no personal information, sets no cookies, and is not shared with anyone. These pages deliberately run a reduced form of analytics: there is no session recording, no automatic capture of clicks or typing, and no replay of anything entered into the support form.

If your browser sends a “Do Not Track” signal, the website collects nothing at all.

The Support Form

If you choose to write to us through the support form, we receive the email address and the message you type, delivered through Resend, our email provider. We use them only to reply to you, and support emails are kept for as long as needed to answer you.

The contents of your message and your email address are never sent to our analytics. We record only that a message was submitted, which app it was about, and a coarse size band for the message (for example “50-200 characters”). If you have written to us and want that email deleted, ask and we will delete it.

Children

Arithmos does not collect data from anyone, including children. The app contains no user-generated content or social features.

Contact

Questions about this policy? Reach us via the support page.

Changes

If this policy changes, the updated version will be posted at this URL. Continued use of the app after changes constitutes acceptance of the updated policy.