• Sign in to bookedIN web: https://scheduler.bookedin.com
• Go to the "Settings > Email/Text Reminders" (top menu) 
  
• Check the box to turn on one or both of the text reminders:  
  

Notes:

• Available for all US 🇺🇸  & Canadian 🇨🇦  businesses

• Unlimited texting during 30-day trial

• Paid plans include unlimited texting

• Free plan: you must upgrade to get text reminders

• If you're on a very old grandfathered plans (from 2013/14 era) you may see a message asking you to upgrade to activate text reminders on your account.