Choosing and switching your plan
Upgrades apply immediately; downgrades take effect at the end of your billing period.
Manage your plan under Settings → Subscription. Every plan card shows what happens if you pick it: upgrading to a higher tier applies immediately (prorated for the rest of your current billing period) — switching to a lower tier, including down to Free, keeps you on your current plan and its features until the end of your current billing period, then switches over automatically.
You can pick Monthly or Yearly billing with the toggle above the plan cards — yearly pricing is shown per month for comparison, with the actual amount you'd be billed yearly underneath. A "Save X%" badge appears when a discount is currently running for that plan; switching between monthly and yearly on your CURRENT plan applies immediately too, the same as a tier upgrade.
If you have a downgrade scheduled, a banner at the top of the Subscription page shows exactly what you're switching to and when — with a "Keep [current plan]" button to cancel it any time before it takes effect.
Switching plans is blocked if you're currently using more than the new plan allows (e.g. more bike categories than it permits) — reduce your usage first, or choose a bigger plan.