Sideline is a small service run by Vantum Works that lets the people who run a group publish its calendar. This page lists everything it stores, in the order you meet it. Nothing here is sold, shared with advertisers, or used for anything beyond running the calendar.
When you sign in
Your email address, so we can send you sign-in links, and the name you choose to enter, so invitations and posts can say who they are from. There is no password. A session cookie keeps you signed in on the device you used. If you continue with Google instead, Google tells us your email address, name, and profile picture; the sign-in record keeps them, Sideline uses only the email address, and we never see your Google password or anything else in your Google account.
When you build a calendar
The calendar’s name and description, every event you add (name, type, date and time, location, arrival time, notes), and the email address of anyone you invite to edit. The editor reminds you to keep children’s names and private information out of shared events; anyone with the link can read the schedule, so the link is the only key.
We also keep a record of the changes you make as an organizer: what you did and when (for example, that you added an event or invited an editor), so we can help when something goes wrong. It is kept for a year and deleted with your account.
When you connect a group chat
- The access token GroupMe gives Sideline when you approve the connection. It is encrypted at rest and used for three things only: posting as the “Sideline” bot in the group you chose, and creating, updating, and removing that group’s GroupMe calendar events. Disconnecting removes the bot and forgets the token.
- The group’s name and id, so Settings can show which group is connected.
- For Discord, no token of yours at all: the Sideline bot posts as itself. We keep the server’s and channel’s names and ids, and, for events Sideline puts on the server’s Events tab, the display names of members who mark Interested, shown only to the calendar’s organizers. Disconnecting forgets the channel, and the bot leaves the server once no calendar uses it.
- For events Sideline puts on the group’s GroupMe calendar: the member nicknames and going or not-going replies that GroupMe reports, shown only to the calendar’s organizers. Cancelling an event removes its replies.
Members
Members never sign in, and Sideline keeps no accounts, names, or contact details for them. A subscribe link works in any calendar app; the app fetches the schedule directly. The one thing we do keep is a count: each time a calendar app or a browser loads a calendar, we count the refresh under an anonymized identifier, a one-way hash of the device’s network address and app name, so an organizer and we can see whether a group’s calendar is being followed. The identifier cannot be turned back into a person or a device, no address is stored, and each count is deleted 90 days after the last refresh it saw. When a member creates or changes an event in the group chat, Sideline keeps the member’s chat name with that change for Sideline’s record of the calendar, and deletes it with the calendar. If you are a member and your name appears on an event through a GroupMe reply, ask an organizer to remove it or write to us.
Sideline sends three kinds of email through Brevo, our email provider: sign-in links, editor invitations, and confirmations when you change your sign-in email. No newsletters, no marketing.
Where it lives and how long
Data is stored in the United States with Supabase (database and sign-in) and served by Vercel, whose logs keep request details such as IP addresses for a short time. Everything stays until you delete it: deleting a calendar removes its events, editors, GroupMe connection, and the GroupMe calendar copies Sideline created; deleting your account removes every calendar you own and your sign-in. Both are in the app, no email required.
What we do not do
No analytics trackers, no advertising, no selling or sharing of data, no accounts for children. Sideline is built for the adults who run a group.
Changes and contact
If this page changes in a way that matters, we update the date above and email account holders. Questions go to support@vantumworks.io.