Bookings · 2026-09-24

Do Appointment Reminders Work? What the Day-Before Message Did in Our Data

The short answer from the research

Yes, and the best evidence is old but solid. A 2013 Cochrane review of eight randomised trials in healthcare, covering 6,615 people, found that text message reminders raised attendance from 67.8% to 78.6%, and worked as well as phone call reminders at 55 to 65% lower cost. Those were clinic appointments, not trial classes, and the data is more than a decade old, but nothing since has overturned the basic finding: people often miss appointments simply because they forget, and a reminder fixes forgetting.

What the research says less about is the other thing a reminder does. It gives the person an easy moment to say "actually, we can't make it". For a class business with limited trial places, that second effect may matter as much as the first.

What we saw in our own data

Conciergr is a WhatsApp assistant that answers enquiries and takes bookings for class businesses. With the Bookings module on, it sends each confirmed attendee a reminder on the morning of the day before their visit. In September 2026 we measured what those reminders did at one of our customers, a tuition centre with several branches, over two weeks (9 to 22 September). It is one customer's data, not a benchmark, and every figure carries its count.

• About half of families replied. 24 of 50 reminded families (48%) wrote back within a day, and 31 of 45 (69%) within three days. (The counts shrink because reminders sent too recently to have had a full day or three days are left out of that figure.) A reply is usually a confirmation, a question about what to bring, or a change of plan.
• Some cancelled, early. Of the 44 reminded bookings whose visit date had passed by the time we measured, 5 were cancelled, and all 5 cancelled after receiving the reminder. Each of those is a place the business heard about a day ahead and could offer to someone else.

We cannot tell you how many of those five families would otherwise have simply not turned up. Nothing in the records says whether a visit actually happened, so we cannot compare no-show rates with and without a reminder. A cancellation a day ahead is the part we can see, and it is the part that makes a free place usable.

We also looked at whether reminded families went on to enrol more often. At these numbers, enrolment after a visit sat between roughly 6% and 18% in every group we compared, with too few bookings in each to tell them apart. We are not claiming a reminder fills your classes.

The gap we found: bookings made the day before

Our original rule said no reminder for a booking made within a day of the visit, on the reasoning that the family had just been talking to us. The measurement showed that covered far more bookings than we expected: 33 of 97 confirmed past bookings at this customer were made within a day of the visit, a third of the total.

A family who books on Friday afternoon for Saturday at 10am is exactly the family a good receptionist would message on Saturday morning. So since 22 September, a booking made or moved on the day before gets its reminder on the morning of the visit instead. A booking made on the day itself still gets none (that conversation is only hours old), and neither does a visit starting before 9am, since reminders only go out between 9am and 8pm.

What makes a reminder worth replying to

The reply rate is the useful signal here. A reminder that gets an answer from half the families is doing more than informing them; it is reopening the conversation at the moment plans are concrete. A few things help:

• Say the day, the date and the time. "Saturday 11 October, 10am" leaves nothing to interpret. "Tomorrow" leaves the family to work out which day you meant when you wrote it.
• Make cancelling easy. The reminder is worth most when a family who can't come tells you so. A message that makes cancelling feel awkward turns that cancellation back into a no-show.
• Send it the day before, not the week before. The reminders in the research mostly went 24 to 72 hours ahead. The day before is close enough to be remembered and far enough ahead to refill a place.
• Keep it transactional. A reminder is a service message about something the family booked. Adding offers or upsells turns it into marketing, which on WhatsApp is billed and treated differently.

Doing the sum yourself

Count last month's booked trials that never turned up, and the ones you only learned were cancelled on the day. Then work out what a trial place is worth to you if it goes to a family on your waiting list instead. That figure, not ours, tells you whether a reminder is worth sending every time.

Frequently Asked Questions

Do appointment reminders reduce no-shows?

Yes. A 2013 Cochrane review of eight randomised healthcare trials found text reminders raised attendance from 67.8% to 78.6%. In our own data from one tuition centre over two weeks, 5 of 44 reminded families cancelled after the reminder, a day ahead, which turns a possible no-show into a place the business can refill.

When should you send an appointment reminder?

We send it on the morning of the day before the visit, between 9am and 8pm local time. A booking made the day before gets its reminder on the morning of the visit instead. The research on reminder timing mostly covers one to three days ahead.

Do people reply to appointment reminders?

In our measurement, 24 of 50 families (48%) replied to a day-before WhatsApp reminder within a day. That is one customer over two weeks, so treat it as what happened there rather than a benchmark.