For your peace of mind, buying the ad-free version will not cause you to lose your Trivia Crack progress, as you will be using the same account you created in the free version.
Keep in mind that your account information is directly linked to your email, so your statistics will be saved as long as you log in using the same credentials.
If you ever lose access to your account, don't worry! Contact us here so we can help you recover it. 😊 Remember to include your username in your message!