Apptoto

Apptoto is an appointment-reminder and messaging service with online booking, built to layer onto the calendar a business already uses rather than replace it. It connects to virtually any calendar — Google, Outlook, Microsoft Exchange, Salesforce, Clio, and more — extracts appointments and contacts, and automatically sends confirmations and reminders to reduce no-shows.

Reminders are its core strength: automated SMS text, email, and voice-call messages with customizable timing and content, plus two-way messaging so clients can reply, confirm, or reschedule, and multilingual support for diverse customer bases. On top of that it offers online booking pages so clients can self-schedule, along with database administration and reporting. This makes it a natural fit for appointment-heavy fields like medical, legal, and professional services that live in their existing calendar but need reliable client notifications.

Pricing is usage-and-subscription based, starting around $39 per month (roughly $30 per month billed annually), with a free trial. Apptoto is web-based and works through your connected calendar. It fits businesses that mainly want rock-solid automated reminders — with self-serve booking as a bonus — attached to the calendar workflow they already have.