Helperly's free plan covers most families. Upgrade from Account → Billing when you outgrow it.
The Family plan ($4.99/mo or $39/yr, with a 30-day free trial) removes the kid/schedule/co-parent limits and adds live calendar subscriptions and the ability to follow other families' calendars — see Family Followers and Calendar Export & Sync.
Once subscribed, "Manage subscription" opens Stripe's secure billing portal, where you can update your card, switch between monthly and annual, or cancel. Cancelling keeps your plan active through the end of the period you already paid for.
Run a studio, gym, or camp instead? See Org Billing for the $25/mo publishing plan.