You can start your trial period anytime, anyday without adding your credit card details and your entire team can use it for 14 days.
Once your trial period is over, the admins of the account will be notified about it and you can subscribe to the plan best suited for you and your team.
PS: we won't auto-charge your card and explicitly ask you to subscribe.
Pricing plan:
You can check out the features and plans by clicking on this link.
For Slack user:
TimeDive is an independent entity and you'll have to subscribe to the app as it's not part of the Slack offering.