Cookie policy

Last updated: March 29, 2023

This Cookie Policy explains what cookies are and how we use them. You should read this policy so you can understand what type of cookies we use, the information we collect using cookies and how that information is used. For further information on how we use, store and keep your personal data secure, see our Privacy Policy.
This Policy also tells you what your rights are in relation to the personal data you give to us. If you have any questions about this Cookie Policy please contact:


SOWISO b.v., doing business as Online Mathematics Placement Test (OMPT)
Science Park 301, 1098 XH Amsterdam
0031 20 752 0000

What are cookies?

Cookies are little text files which are stored on the browser or hard drive of your computer or mobile device when you visit a webpage or application. Cookies work to make your experience browsing our site as smooth as possible and they remember your preferences so you don’t have to insert your details again and again.There are different types of cookies. Some cookies come directly from our website and others come from third parties which place cookies on our site.

Cookies can be stored for varying lengths of time on your browser or device. Session cookies are deleted from your computer or device when you close your web-browser. Persistent cookies will remain stored on your computer or device until deleted or until they reach their expiry date.

We are 3 varieties of cookies which operate on our website:

1. The essentials
Some cookies are essential for you to be able to experience the full functionality of our site. Without these cookies, some parts of our site just won’t work as they should.

2. The customisers
These cookies (also called functional cookies) allow our site to remember your preferences, helping you to customise your experience on our site..

3. The performance improvers
These cookies tell us about how you use the site and they help us to make it better. This helps us to improve the way our site works, for example, by ensuring that users find what they are looking for easily.

How do we use cookies?

We use cookies to enhance your browsing experience by:

What types of cookies do we use?

Our cookies are essentials and customisers. They allow you to navigate our site, log-in, add products to your basket, set the language settings, display the correct page for the device you are using, verify your details when you make an order and they allow us to process payment for an order.

To opt out of these cookies you will need to change the settings on your browser Cookie preferences. If you choose to block these cookies our website may not work as it should and any preferences you have may be lost.

We will never use targeter cookies (also called advertising cookies) which are used to deliver advertised content which is relevant to you and they can be used to track the effectiveness of our ad campaigns on third party websites.


Our website uses Zendesk, a third-party service, to provide customer support and other services. This service sets cookies on your device to enable certain features and collect information about your browsing activity Zendesk sets a number of cookies on your device when you visit our website. These cookies help the service to function properly and provide support to our users.

The specific cookies that Zendesk sets may include:
_zendesk_authenticated: This cookie is used to keep a user logged in when they navigate between pages on our website.
_zendesk_session: This cookie is used to maintain a user's session on our website, and is deleted when the user closes their browser.
_zendesk_shared_session: This cookie is used to enable Zendesk to link a user's session across different websites that use the service.
_zendesk_cookie: This cookie is used to remember a user's preferences for the Zendesk widget, such as their language or chat history.

How long do Zendesk cookies last?
The duration for which Zendesk cookies are stored on your device may vary depending on the specific cookie. Some cookies may expire after you close your browser, while others may be stored for longer periods of time. You can find more information about the lifespan of specific cookies in Zendesk's cookie policy.

Can I opt out of Zendesk cookies?
Yes, you can manage your cookie settings and opt out of Zendesk cookies by adjusting your browser settings. However, please note that disabling cookies may impact the functionality of our website and limit your ability to use certain features.

Where can I learn more?
For more information about the cookies that are set by Zendesk, please see their cookie policy at If you have any questions about our use of cookies or our privacy practices, please contact us.

How do you change cookie preferences or block cookies?

Within your browser, you can choose whether you wish to accept cookies or not. Different browsers make different controls available to you. Generally, your browser will offer you the choice to accept, refuse or delete cookies at all times, or those from providers that website owners use i.e. third-party cookies or those from specific websites. Each browser’s website should contain instructions on how you can do this.

For further information please refer to

If you block cookies on our website, you may be unable to access certain areas of our website and certain functions and pages will not work in the usual way.

Changes to the Cookie Policy

We may update this Policy from time to time. If we make significant changes we will let you know but please regularly check this Policy to ensure you are aware of the most updated version.