Excel or a booking app: an honest reckoning

It's Sunday, 9.40 p.m. Instead of watching your series, you're copying appointments from messages into a spreadsheet: Marina on Tuesday at 10, Ivana moved to Thursday, and on Friday at 2 p.m. you've got two names in the same cell and no idea which one counts. If that scene sounds familiar, this article is for you. I'm not going to tell you Excel is bad — I'm going to tell you where it's perfectly adequate, where it breaks down, and what it really costs you, in hours and euros.

Where Excel is a perfectly good choice

Let's start fair: a spreadsheet is free, you know it inside out, and nobody is forcing you to change. For some businesses, Excel (or a Google sheet) does the job without any trouble:

• You work solo and have fewer than 10-15 appointments a week. That many appointments you can hold in your head anyway. The spreadsheet is just a backup and an overview of the week.
• Your clients are regulars and appointments don't move. If Ana has been coming every other Tuesday at 5 p.m. for three years, you don't have a problem that needs solving.
• You book in person. The client finishes their treatment and books the next one on the spot. No messages across three channels, no phone calls, no chaos.
• You don't need statistics. You know roughly how much you earn and how much you work, and that's enough for you.

In that situation, an app won't change your life. Yes, a spreadsheet doesn't send reminders — but with ten appointments a week you can send them by hand in 15 minutes. Don't replace a tool that works just because someone tells you "everyone's switching to apps".

Where Excel breaks down: four breaking points

The problem with a spreadsheet isn't the spreadsheet. The problem is that everything around it is done by you, by hand, every day. Here are the four places where that starts to hurt:

1. Reminders. A spreadsheet can't tell a client they have an appointment tomorrow. That means sitting down every evening and typing out messages — or skipping it when you're rushed off your feet. And that's exactly when someone forgets to turn up. No-shows typically eat 10-20% of appointments, and a reminder the day before cuts them substantially. The spreadsheet gives you nothing here.

2. Double entries and gaps. A client texts you a change while you're driving. You say "sure, I'll put it in". You don't. Or you put it in the wrong week, on the wrong sheet, over someone else's appointment. Every mistake like that is an awkward conversation and very likely a lost client — because the client whose appointment you "lost" rarely tells you they mind. They simply stop coming.

3. The team. The moment there are two of you, one spreadsheet becomes a battlefield. Who saved the last version? Why can't my colleague see my entry? Who's working Saturday? A shared spreadsheet partly solves that, but shifts, holidays and "who's allowed to change whose appointments" are still left hanging in your message threads.

4. Statistics. The data in the spreadsheet exists, but nobody looks at it, because every answer would mean building formulas. How many no-shows does one particular client have? Which service brings in the most revenue? How full is your Thursday? Those are decisions about prices and opening hours — and you're making them on gut feeling.

The maths: what running things by hand costs you

Take a typical solo business with 25 appointments a week. Here's what a week of manual admin looks like, realistically and without inflating anything:

• Arranging appointments by message and phone: on average 4 minutes per appointment (the enquiry, "does Thursday work", "it doesn't, how about Friday?"). 25 × 4 = 100 minutes.
• Manual reminders the day before: 2 minutes per appointment. 25 × 2 = 50 minutes.
• Copying over and moving around: entries, deletions, "hang on while I find the spreadsheet" — about 20 minutes a week.
• Patching gaps after cancellations: ringing or texting down the list to fill the slot, 15-20 minutes per cancellation, say twice a week — 35 minutes.

Total: around 3.5 hours a week, so ~15 hours a month. If an hour of your work is worth €20 (a haircut, a treatment, a training session — it makes no difference), that's around €300 a month spent on admin. Even if you count a modest €15/h, it's €225.

Add the no-shows: with 100 appointments a month and a 10% no-show rate without reminders, if reminders cut that percentage in half, you've saved 5 appointments. At an average price of €25, that's another €125 a month.

And now, to be fair in the other direction: an app doesn't give you all 15 hours back. Some clients still text and call, and there's always something you enter by hand. Realistically you get back half to two thirds — so 7 to 10 hours a month. That's still one full working day.

What an app actually changes (and what it doesn't)

So it's clear what you're buying, here are both sides.

It changes:

• Clients book themselves, 24/7. You send out a link and half the messages disappear. Bookings come in while you work and while you sleep.
• Reminders go out on their own. In Appointa, the client gets a reminder roughly 24 hours before the appointment by e-mail and push, and — with the SMS add-on enabled — by SMS for clients without the app, without you lifting a finger.
• Double bookings don't exist. A taken slot simply can't be booked a second time.
• The team looks at the same calendar. Everyone sees their own shift, you see everything. No spreadsheet versions.
• No-shows are remembered per client. You can see who has stood you up three times and decide how to deal with them.
• Gaps fill themselves. The waitlist offers a freed-up slot to the clients who are waiting — instead of you ringing round.
• Statistics without formulas. Revenue, occupancy, most-requested services — you open it and see.

It doesn't change:

• An empty calendar. No app brings in clients by itself. If the problem is too few enquiries, the solution is marketing, not a tool.
• Bad habits. If you take appointments "on the fly" outside the calendar, the chaos simply moves house into the new tool.
• People who like to phone. Some clients will never click a link — and that's fine; you enter them by hand into the same calendar.

When NOT to switch to an app

An honest reckoning means saying this out loud too:

• You have fewer than 10-15 appointments a week and your clients are regulars. The saving is too small to justify even the minimal effort of switching.
• You're in the middle of your busiest season. The switch takes a week or two of getting used to. Do it in a quieter month, not when the book is full.
• You expect the app to fix a shortage of clients. It won't. Fill the calendar first, then organise it.
• You can't face setting aside an hour for setup. Services, prices, opening hours — without that minimum, no tool works. If you genuinely have nowhere to squeeze that in right now, wait.

If you're switching: five steps to a smooth changeover

Switching doesn't have to be a drama. Here's how to do it in one go:

1. Export your clients from the spreadsheet. Columns for name, phone, e-mail — save as a CSV. You import them into Appointa in one batch, from Excel or CSV, so you don't retype anyone by hand.
2. Enter your services and opening hours. Durations and prices exactly as they are. This is that hour of work.
3. Point new enquiries at the link. When someone asks "have you got a slot", reply with the booking link. Leave existing arrangements alone.
4. Run both in parallel for two weeks. Honour what's already booked the old way; everything new goes into the app. After two weeks, the spreadsheet empties itself.
5. Set your regulars up as recurring appointments. Ana still comes every other Tuesday at 5 — except now she gets a reminder too, and you don't write her in from scratch every time.

Don't delete the spreadsheet. Save it as an archive and close it with a clear conscience.

Conclusion: the numbers side by side

Excel costs you €0 a month — plus roughly 15 hours of your time and the no-shows that come without reminders, which at 25 appointments a week is easily €300-400 a month in time and lost appointments. An app costs €0-20 a month (Appointa's Starter is free up to 30 appointments a month, Pro is €20), and it gives you back 7-10 hours and roughly halves your no-shows. Above 15-20 appointments a week, the sums are clear. Below that — stay on the spreadsheet with an easy mind, and come back to this article when the book starts to feel too tight.

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If the spreadsheet is eating your Sunday evenings, move your appointments somewhere they store, remind and count themselves. Try the demo for your industry — free, no card required. And the Starter plan is free — up to 30 appointments a month.

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Frequently asked questions

Can I move my existing clients from Excel into an app?

Yes — and don't switch to a tool that doesn't allow it. The preparation is simple: keep columns for name, phone and e-mail in your spreadsheet, save it as a CSV and import it. For a hundred or so clients that's about ten minutes' work, and you build the visit history onwards from the first appointment.

What if my clients don't want to book online?

They don't have to. The calendar works just the same when you enter an appointment by hand — after a call or a message. In practice you end up with a hybrid: younger clients click the link, older ones ring like they always have. What matters is that everyone gets a reminder, no matter how they were booked in.

Is an app worth it if I have around 20 appointments a month?

Financially — hardly. With that many appointments, admin eats an hour or two of your week, and a spreadsheet or a diary is a legitimate choice. But since free plans exist, it costs you nothing to try one and see whether the habit sticks. If your appointment numbers start climbing, you've already made the switch.