It’s up to you – we offer both daily and continuous options for receiving reviews by email. For integrations, like Slack, you will receive the reviews soon after we receive them
Some app stores publish new reviews throughout the day, others (notably Apple) release reviews in batches every 3-4 hours.
You can expect to receive new reviews within 60 minutes of the app store publishing them if you’ve opted for continuous delivery.
More information on email notifications can be found here.