No, Tinder does not notify your contacts that you are using the app. Tinder is designed to be a discreet platform for meeting new people, and the app’s developers have made efforts to ensure that your activity on the app remains private.

Tinder does not require users to connect their Facebook account or any other social media accounts to the app. This means that your activity on the app will not be shared with your Facebook friends or any other social media contacts. Additionally, Tinder does not share any information about your matches or conversations with your contacts.
However, there is one exception to this rule. If you use your phone number to sign up for Tinder, the app will send a verification code to that phone number. If one of your contacts has your phone number saved in their phone, they may receive a notification that you have signed up for Tinder. However, this notification will not disclose any information about your activity on the app.
It’s worth noting that while Tinder does not notify your contacts that you are using the app, there is always a risk that someone you know may come across your profile while swiping. This is because Tinder shows users profiles of people who are within a certain radius of their location. If someone you know is using the app and is within that radius, they may come across your profile. To mitigate this risk, you can adjust your settings to only show your profile to people you have swiped right on or to people who have already swiped right on you.
In summary, Tinder does not notify your contacts that you are using the app. While there is a small risk that someone you know may come across your profile while swiping, you can take steps to mitigate this risk by adjusting your settings.