AppointmentSMS — Free via Gmail

Send free appointment SMS reminders via your Gmail + carrier email gateways. No paid services needed.

AppointmentSMS lets you send personalized SMS appointment reminders in bulk — completely free, using your existing Gmail account. HOW IT WORKS Upload an Excel or CSV file with patient/client names, phone numbers, and appointment times. The extension emails each person's carrier gateway, which delivers it as a real SMS to their phone. FEATURES ✓ 100% free — no Twilio, no paid SMS service required ✓ Supports all major US carriers via email-to-SMS gateways ✓ Supports all major Canadian carriers via email-to-SMS gateways ✓ Full carrier reference list available inside the extension ✓ Auto-detects carrier or tries all gateways automatically ✓ Customizable message template with {name} and {time} placeholders ✓ Save multiple named templates for different appointment types ✓ Upload history with CSV export ✓ Live send log with per-contact status ✓ Supports .xlsx, .xls, and .csv files