Separate number: yes, effectively always. Separate device: probably not, unless one of three things is true.

The question people mean when they ask this is usually "do I have to carry two phones?", and for most solo practices the answer is no. A second number on the phone you already own gives clients somewhere to call that isn't your personal line, which is the part that actually matters.

Buy the second device when one of these applies:

Your work could put your phone in front of a court. Practitioners doing child-welfare and custody-adjacent work raise this specifically — colleagues have had personal phones subpoenaed because the same handset was used for work, and at that point the whole device is in scope, not just the work part. It is not common. It is also not fixable after the fact.

You cannot put the work down otherwise. If the reason you want separation is that you never stop checking, a notification setting will not save you and a second number on the same phone will not either. A device you can leave in a drawer will.

Someone else needs to answer it. An administrator, a colleague covering your holiday, or a shared office line is easier with a device that lives in the practice rather than in your pocket.

What does a separate number actually get me?

Three things, and it is worth being precise because the marketing for this category tends to promise a fourth it doesn't deliver.

It gets you a number you can give out freely — on a directory profile, a website, a business card — without that number being attached to the rest of your life.

It gets you a boundary you can point at. "That's my practice line, it's answered during these hours" is a sentence you can say to a client. "That's my phone" isn't.

It gets you something you can change. A work number can be replaced without touching your personal contacts, your banking, or your two-factor codes.

What it does not automatically get you is quiet. Which is the next section.

Why does the separate number still ring my pocket?

Because on one device, it usually does.

This is the most-repeated disappointment with second-number apps. Practitioners describe the personal phone ringing for every call to the work number, being unable to tell a client from a spam call before answering, and — the one that generates the most irritation — the app writing client contacts into the phone's real address book. One person put it as: what is the point of having a whole other number.

You can manage a lot of it. Separate ringtones, notification schedules, a do-not-disturb window, and a work number whose calls go to voicemail outside your hours are all real controls, and used together they get you most of the way.

But "most of the way" is the honest ceiling for one device. If you need the whole way, that is what the second handset is for.

What about two numbers on one phone through my carrier?

This is the middle option and it is underrated. Modern phones handle two lines cleanly, the second number is a real mobile number on a real network, and outbound calls and texts behave normally — which is not guaranteed with internet-based numbers.

The trade-off is that it is a plain phone line. No greeting scheduling, no transcription, no automatic reply to a missed call, nothing that answers on your behalf while you are in session. If you were hoping the second number would solve the "there is no window in my day to return calls" problem, a carrier line will not — it just moves which number the unreturned calls arrive on.

What do most people end up doing?

The distribution in public threads runs roughly like this. A large group runs a second number on one device and manages the notifications. A smaller, very consistent group carries two phones and describes it as worth the annoyance, usually citing peace of mind rather than any specific incident. A third group tried two numbers, got confused clients calling both, and consolidated back to one — a failure mode worth planning around rather than dismissing.

Nobody who has run a practice for a while recommends handing out the personal number and being careful.

If you're deciding right now

Ask yourself one question: what is the separation for?

If it is so clients have somewhere to call that isn't your cell — one device, two numbers, done.

If it is so you can stop — a second handset, and put it in a drawer at six.

If it is so something answers when you are in session — the number of devices is not the variable you are looking for. What you need is a greeting, an automatic reply, and a stated response time, and those come from what is behind the number rather than from how many phones are on your desk.

The cheaper answer, said plainly

If your practice is small, your caseload is adults, your intake is mostly by email or through a directory's messaging, and you are content to return calls yourself in a gap between sessions — a second line from your mobile carrier on the phone you already own is the whole solution. It costs less than most practice software and there is nothing to go wrong that your carrier can't fix.

Add anything more only when the thing you are missing is not a number.

About Rivet

Rivet is a Canadian practice line built for therapists — a separate number for calls, texts and voicemail, with video sessions and clinical tools in the same place. Your data stays in Canada, and transcription runs on Rivet's own hardware rather than a third-party AI service.

One plan, $65 CAD a month, everything included. Fourteen-day trial, no card.

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