The constraints at a glance
A few that trip people up
iMessage doesn’t blast
The per-line caps exist because iMessage rewards personal, opt-in sending and punishes volume. Tuco is a speed-to-lead tool — reach people the moment they raise their hand (form fills, ad opt-ins, hot inbound). To scale, add lines; don’t push one line harder. See line health & restrictions.Bans and replacements
If a line is banned, you get a free replacement on the first occurrence (later replacements may carry a fee). A banned number can’t be recovered — only replaced. Treat every line as a working sender that could one day need swapping, not a forever number.No PHI, ever
Because Apple won’t sign a BAA, no service built on iMessage — Tuco included — can be HIPAA compliant. Clinics and medspas can use Tuco for booking and reminders, but never for diagnoses, records, or any medical detail.Frequently asked questions
How many iMessages can I send per day?
How many iMessages can I send per day?
Per line, the default is 50 new-contact sends and 150 total sends per day, paced to ~7 first-touch sends per hour so a line never bursts. All three can be raised on request, and adding lines multiplies your capacity. See rate limits.
Can Tuco blast a big cold list?
Can Tuco blast a big cold list?
No — by design. iMessage penalizes high-volume cold sending with permanent bans, so Tuco caps each line and is built for personalized, opt-in, speed-to-lead outreach. See line health.
Can I bring my own phone number?
Can I bring my own phone number?
No. Tuco can’t port in an existing number. You get a new number, and if a line is ever banned it’s replaced with another new number (the old one can’t be recovered).
Is Tuco HIPAA compliant?
Is Tuco HIPAA compliant?
No, and it never can be — Apple won’t sign a BAA for iMessage. Don’t send protected health information. Appointment booking and reminders are fine; medical detail is not.
How do I reach Android users?
How do I reach Android users?
Two ways, and the simple one does not involve A2P 10DLC.P2P SMS (recommended). The line sends the text itself, from its own number, through the iPhone paired to it. Same number, same thread — the contact just sees a green bubble. It’s person-to-person traffic, so there is no brand or campaign registration. It is off by default; ask support to turn it on for a line.A connected SMS provider. Twilio, Telnyx or GoHighLevel, from a separate number you own. This one is application-to-person, so US traffic needs A2P 10DLC registration — that requirement comes from the carriers, not from Tuco.You can also just message iPhone contacts and skip both.
Rate limits & sending caps
The exact per-line daily and hourly caps, and how to raise them.