Just click on "Sign up for free with Slack". You'll be asked to login in with your existing Slack account. You can try for free with your team for 30 days. If you'd like someone to walk you through the process, just click on "Get a demo" above. ☝️ .
Do we need to have Slack to use this?
Right now, yes, 'Where' is only available to teams who use Slack. We do have a beautiful web app, but we use Slack accounts for authentication. We'll be adding support for MS Teams soon!
Does it work on mobile?
Yes, most of the functionality is built right into Slack so it'll work with the Slack app, but the 'Where' web app also works on mobile devices.
How much does it cost?
You can try 'Where' for free for the first month, after that it costs USD$3 per active user. Only pay for users who actively set their locations/schedules throughout the month.