Airstudio sends text messages through your own Twilio account. Texts reach parents and staff faster than email and are the channel most studios rely on for day-before reminders and clock-in nudges.

Setting up

1. Create a Twilio account and buy a phone number with SMS capability. In the United States, register the number for A2P 10DLC messaging; unregistered numbers are filtered by carriers.
2. In Airstudio, go to Settings › Integrations › Twilio and click Configure.
3. Enter the Account ID, Auth Token, and the Sender number in international format, for example +17655373896.
4. Turn on Twilio Enabled and save. Airstudio validates the credentials before saving.

Once Twilio is valid, the SMS checkbox becomes available on every notification and the SMS template can be edited and tested.

Writing SMS templates

• Keep messages short. Carriers bill per 160-character segment, and long messages arrive as several parts.
• Every SMS template must contain {{ unsubscribe_link }}. The editor will not save without it.
• Variables work exactly as in email. Booking and login links are long, so prefer one link per message.
• SMS Link Tracking shortens links and records clicks in the Sent log. Turn it off if you want the bare URL visible.

Delivery and opt-outs

A recipient who replies STOP is unsubscribed at the carrier level. Airstudio records later attempts to that number as Not Delivered · unsubscribed rather than treating them as errors, and their preferences page shows SMS turned off. Invalid or landline numbers are recorded as Not Delivered · invalid recipient. Only the immediate outcome is recorded; a message accepted by Twilio and later blocked by a carrier still shows as sent.

Subjects and contacts must have a phone number on file and Receive SMS enabled in their preferences. Employees must have a phone number on their profile.

Cost

Each text is billed by Twilio to your account, and Airstudio counts it toward your notification usage. Trim templates, avoid sending both email and SMS for low-value events, and use SMS for the messages that need to be read within the hour.