Cookies policy

Revision 2 dated 20.10.2026

This English text is a translation of the Russian original and is provided for convenience. In the event of any discrepancy between the English and the Russian version, the Russian version prevails.

1. Introduction

This document describes how we use cookies and similar technologies on our Service, including the websites digitalmechanics.dev and lensacode.ai (hereinafter, the "Service"). Cookies are small text files that are stored on your device when you visit a website.

By using the Service, you agree to the use of cookies in accordance with this policy.

2. What are cookies?

A cookie is a text file containing a small amount of data which:

Is exchanged between your browser and our servers
Is stored on your device (computer, smartphone, tablet)
Can be read by the website that created it
Helps websites remember information about you

3. Types of cookies

3.1 By lifetime

Session cookies:

Are deleted automatically when the browser is closed
Are used to store information temporarily during your visit
Do not require separate consent for essential functions

Persistent cookies:

Remain on your device after the browser is closed
May last for several days, months or years
Where they are not essential, are used with consent in the manner set out in section 7

3.2 By origin

First-party cookies:

Are set by our Service
Can be read only by our website
For example: example.com can create only its own cookies

Third-party cookies:

Are set by other services (analytics, payments)
Can be read by other sites
Are used in the manner set out in sections 7 and 8

4. Categories of cookies we use

4.1 Essential (mandatory) cookies ⚠️

These cookies are necessary for the Service to work correctly and do not require consent.

They include:

Identification of your session and authentication
Protection against attacks (CSRF protection)
Storage of your basic preferences (language, interface theme)
Securing access to the API

Lifetime: From the end of the session up to 1 year, depending on the type

4.2 Functional cookies

Improve convenience and the personalisation of the user experience. Require consent.

They include:

Remembering your preferences and settings
The state of the interface (expanded/collapsed, open panels)
Storing the history of your actions in the current session
Personalisation of how content is displayed

Lifetime: Usually from several days up to 1 year

4.3 Analytics cookies

Help us understand how users use the Service and where we can improve it, and evaluate the effectiveness of advertising. They are set from the first time the site is opened; a banner informs you of this on your first visit (clause 7.1).

They include:

Tracking the number of visits and users
Analysis of the time spent on different pages
Identification of popular features and sections
Collection of information about device and browser types

The data is used only to:

Improve the performance of the Service
Fix problems with functionality
Analyse anonymised user behaviour
Evaluate the effectiveness of the Service's advertising in Yandex Direct

Lifetime: From 20 hours to 2 years, depending on the cookie

Providers: Yandex Metrica (Yandex LLC), see clause 8.1 for details

4.4 Payment system cookies

Used by payment providers when processing payments and paying for services.

They include:

Identification of the payment session
Fraud prevention and payment security
Processing and confirmation of the payment
Compliance with payment system security requirements

Providers: Robokassa, CloudPayments

Privacy policies:

5. How to manage cookies

5.1 Managing cookies in your browser

Google Chrome:

Open Settings → Privacy and security → Cookies and other site data
Select the options you need:
- Allow all cookies
- Block third-party cookies
- Block all cookies

Mozilla Firefox:

Open Settings → Privacy & Security
In the "Cookies" section, choose the level of protection you need

Safari (macOS/iOS):

Settings → Privacy
Tick "Block all cookies" and choose the level

Microsoft Edge:

Settings → Privacy → Clear browsing data
Select "Cookies and other site data"

5.2 Managing cookies on our Service

On your first visit to the Service, a banner informs you of the use of cookies and visit analytics (clause 7.1). The site has no switch for cookie categories: you can manage cookies in your browser settings (clause 5.1) and opt out of analytics in the ways set out in clause 7.2.

5.3 Declining cookies

If you block cookies (other than the essential ones) in your browser settings, this may result in:

A reduced quality of the user experience
Some features being unavailable
However: the Service remains fully functional without functional and analytics cookies

6. What data can be entrusted to cookies?

6.1 What data is stored in cookies

Typically stored:

Session and authentication identifiers
Your interface preferences and settings
Information about your use of the Service (which features you use)
Analytics data about behaviour (anonymised)

NOT stored in cookies:

Passwords or authentication keys
Full personal data
The content of your requests and their results
Financial information (card numbers, payment details)

6.2 Cookie security

Session and authentication cookies on our Service:

Are transmitted only over HTTPS (a secure connection)
Are marked with the HttpOnly flag (inaccessible to JavaScript)
Are marked with the Secure flag (transmitted only over HTTPS)
Are marked with the SameSite flag (protection against CSRF attacks)

Yandex Metrica cookies are set by its counter, and their parameters are determined by Yandex (clause 8.1).

7. Your rights and consent to cookies

7.1 How we obtain consent

On your first visit to the site we show a banner, "By continuing to use the site, you agree to the use of cookies and visit analytics.", with the buttons "Learn more" and "Got it"
By continuing to use the Service, you agree to the use of functional and analytics cookies
Yandex Metrica analytics cookies are set from the first time the site is opened, before any button in the banner is pressed
The site has no separate switch for cookie categories

7.2 Opting out of analytics

You may opt out of analytics at any time:

By blocking cookies of the site and of Yandex domains in your browser settings (clause 5.1)
By installing the "Блокировщик Яндекс Метрики" (Yandex Metrica Blocker) add-on for Firefox or Chrome: Yandex instructions

Opting out of analytics does not restrict access to the Service.

7.3 Your rights in respect of data collected through cookies

The rights of access, rectification, erasure and withdrawal of consent in respect of personal data, including data collected through cookies, are described in section 8 of our Privacy Policy.

8. Third-party cookies

8.1 Analytics services

We use the Yandex Metrica service (Yandex LLC): counter No. 113698383 on the website digitalmechanics.dev and counter No. 113698502 on the website lensacode.ai. We use Metrica in order to:

Count visits and distinguish one visitor from another
Evaluate the effectiveness of advertising in Yandex Direct by the goals achieved: on digitalmechanics.dev, registration, free download of a product and payment (a confirmed top-up or purchase, without the amount); on lensacode.ai, going to D'Lemma (dlemma.tech) and going to digitalmechanics.dev

Metrica receives the page address (without parameters other than the advertising tags utm_* and yclid, and without the part after the # sign), the referrer, device and screen data, clicks on external links and the goals achieved. Session recording (Webvisor) and the click map are turned off, and e-commerce is not enabled. Your account identifier, name, telephone number, email address, payment amounts and payment data are not passed to Metrica. We receive Metrica reports in aggregated form and do not link them to your account.

The counter sets Yandex cookies: _ym_uid and _ym_d for 1 year, _ym_isad for 20 hours, and the others for up to 2 years. The full list is in the Yandex Metrica help article "Использование файлов cookie" (Use of cookies). Yandex processes this data under its own rules: "Условия использования сервиса Яндекс Метрика" (Terms of Use of the Yandex Metrica service) and the Yandex Privacy Policy.

How to opt out of analytics is set out in clause 7.2.

8.2 Payment systems

When you make a payment, Robokassa, CloudPayments and the other payment providers we use may set their own cookies in order to:

Prevent fraud
Secure the payment
Comply with payment system security requirements

They will process your data in accordance with their own privacy policies.

9. How long are cookies stored?

Session cookies: are deleted automatically when the browser is closed

Persistent cookies:

Essential: 30 days – 1 year
Functional: 90 days – 1 year
Analytics: 20 hours - 2 years (Yandex Metrica cookie lifetimes are set out in clause 8.1)

You can delete cookies manually through your browser settings.

10. Updates to this policy

We may update this policy at any time when our cookie practices change. Updates will be posted on this page.

If we add new types of cookies, we will update this policy.

Thank you for using our Service!

Company details

Dmitrii Sgonnov, Sole Proprietor
Tax ID: 422922383420
OGRNIP: 326547600002879
Address: Apt. 87, 126 Bolshevistskaya St., Novosibirsk, 630083, Russia
E-mail: support@digitalmechanics.dev