The Daily Limit addon for Quiz and Survey Master allows you to restrict users to only a set amount of entries per day.
Once you have purchased the addon, you will have access to download the addon. To install, simply upload the addon as a normal WordPress plugin. To do so, go to the Plugins page and click Add New. Then, click Upload. From there, upload the zip file that you downloaded when downloading the addon. Once the addon has uploaded, you should now have the plugin QSM - Daily Limit listed in your list of plugins. Activate that plugin. Once activated, the addon will add a new tab in the Addon Settings:
Once you enter your license key in on the Daily Limit tab on the Addon Settings page, you will then have a new Daily Limit tab when editing your quiz which looks like this:
For the quizzes that you would like to restrict the number of entries per day, simply change the "Enable a daily limit for this quiz/survey?" option to "Yes".
Then, set the "How many times can a user take the quiz/survey per day?" to how many entries a user is allowed to submit.
Then, use the "What text should be shown to the user who has already reach the daily limit?" text box to enter in the message that is shown to the user if he or she tries to submit another entry.
Be sure to click "Save Settings" once you are finished configuring the options. Now you are ready to go!