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Tuco sends real iMessage from real Apple hardware, so it inherits Apple’s rules — these are the hard constraints to plan around. This page is a quick operational reference; each row links to the detailed doc. For the full plain-English rundown of why each limit exists, see tuco.ai/limitations.

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The constraints at a glance

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A few that trip people up

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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.

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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.

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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.

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Frequently asked questions

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.
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.
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).
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.
Android contacts receive SMS from an A2P 10DLC-registered number that you bring and register (brand + campaign). Or message iPhone contacts only and skip A2P entirely.

Rate limits & sending caps

The exact per-line daily and hourly caps, and how to raise them.