How it works:
SMS Reminders can activate a reminder automatically when two conditions are met:
The event has one correct suggested client mobile (after toll-free and conference numbers are excluded).
You've approved automation for that number or for your whole account.
If either condition isn't met, SMS Reminders asks you to confirm instead of activating on its own.
Option 1: Approve one appointment at a time
No setup required — this is on by default.
Open an event where SMS Reminders has suggested the correct mobile number in pink.
Next to Activate this reminder, select Always auto-activate reminders for this number.
Check the number shown is correct, then confirm.
That event and all future events with the same number now activate automatically. To keep a number as suggest-only, skip step 2.
Option 2: Turn it on for your whole account
Go to Settings.
Turn on Automatically activate reminders when the number is clear.
Every event with a clear number now activates automatically, with no per-number prompt. Ambiguous events still come to you to confirm.
Review and undo automatic reminders
Spot them: Auto-activated reminders show an auto-activated badge and the reason for the number chosen
Undo one: Tap Undo on the reminder any time before it sends.
See all of them: Open the activity feed to view every auto-activated reminder in one place.
Fix a wrong number
Tap the Got it wrong link on the reminder.
Enter the correct number.
SMS Reminders forgets the old number and uses the corrected one going forward.
Change a number, attendee, or time
When you edit an event, SMS Reminder will automatically revalidate the number. If the number changed, it switches back to asking you to confirm before sending. It will not send a reminder to a new number automatically.
FAQ
What happens if an event has two possible numbers? It won't auto-activate. SMS Reminders shows the options and you pick one.
Do I need to approve recurring appointments each time? No. Approving a number applies it to all future events in that series.
How do I turn automation off? Turn off the account setting, or use Got it wrong to forget a specific number.