Terms of service
Last updated 20 September 2026
These terms cover your use of Tandem. Using the service means you accept them. We have kept them short so that reading them is realistic.
Your account
You need a Google or Microsoft account to sign in, and you must be allowed to connect the calendars you connect. If a calendar belongs to an employer, that is between you and them. Keep your sign-in secure; anyone who can read your email can reach your Tandem account.
What we do
Tandem mirrors busy time between the calendars you put in a sync group and serves booking pages that respect that combined availability. The events we create are ours to manage: we will update and delete them as your source events change, so do not edit them by hand and expect the edit to survive.
What we do not promise
Sync depends on Google and Microsoft delivering change notifications and accepting our writes. We usually propagate a change in under a minute, but that is a description of normal behaviour, not a guarantee. Providers have outages, revoke tokens and rate-limit us. Tandem is a scheduling aid and not a system of record, so confirm anything that really matters before you rely on it. The service is provided as is, and our liability is limited to what you paid us in the previous twelve months.
Payment
The free plan stays free. Pro is $9 per month or $90 per year, charged through Stripe and renewing automatically until you cancel. Cancel any time from the billing page and Pro continues until the end of the period you paid for, after which the account returns to free limits. If Tandem did not do what you expected within your first 30 days on Pro, email us and we refund in full. We will give at least 30 days’ notice by email before changing prices.
Acceptable use
Do not use Tandem to send spam through booking pages, to scrape another person’s calendar without permission, to break provider terms, or to attack our infrastructure. We may suspend accounts doing any of that, and we will tell you why.
Ending it
You can delete your account at any time; we remove the events we created and erase your data as described in our privacy policy. We can close an account for the reasons above or if we shut the service down, in which case we will give 60 days’ notice and refund unused prepaid time.
Changes and contact
If we change these terms materially we will email you before the change takes effect. Questions: support@tandem.app.