FlashFillz — filling cancellations automatically

Every cancellation is money walking out your door. We text it back.

Someone cancels → you send one text → your waitlist is invited within seconds → the first YES wins the slot at full price → you get "Filled by Jane — 2pm." No app, no login, no phone tag. The only text you ever send is the first one — and if you connect your calendar, you don't even send that.

Why this exists

Every appointment business bleeds the same way: a cancellation two hours out is an empty chair nobody can fill by phone. The waitlist exists — in a notebook, a spreadsheet, someone's memory — but working it means twenty calls for one maybe. So the chair sits empty, and $50–$600 walks out the door. Every day. Every chair.

FlashFillz turns that dead time into a market. The business sends one text. Every eligible waitlisted customer is invited within seconds, highest-priority first. The first YES wins the slot — raced fairly, confirmed instantly, reminded the day before. The booking and its dollar value are recorded the moment it happens, and every Monday the business gets one message: "Appointments recovered: 7. Revenue recovered: $1,950."

And once a slot is in the system, the recovery guards itself: the winner gets a reminder the day before so they actually show, and if they cancel, the slot re-opens and your waitlist is re-invited within seconds. The cancellation of the recovery recovers itself — the only text you ever send is the first one.

No software to learn, no app to install, no behavior to change — the entire product runs over the one interface every business and every customer already uses: a text message.

Do your own math — drag the sliders:

Drag the fill rate down to your most skeptical guess — the math still works. That's not software pricing — that's the cheapest employee you'll ever hire, and it works nights, holidays, and while you're mid-client.

The recipe

One line, a few pieces. Only the first four are required.

📅Calendar auto-fill — zero texts

Share your Google Calendar with FlashFillz (view-only, 30 seconds, revocable anytime) and you can stop sending even the FILL text. When an appointment disappears from your calendar, FlashFillz notices within minutes — and depending on the mode you choose, either hands you the FILL ready to send, or just fills it.

Alert mode — we spot it, you approve it:

Auto mode — we spot it, warn you first, then fill it. You always get a 10-minute veto:

Ten minutes later (unless you said no): "We're filling it: Sophie Tran ($180). Your waitlist is being invited now." No customer ever hears anything before your window closes.

• Exact pricing: put the $ in the event title ("Full set $180") and the recovered booking is recorded at that exact value — no $ and your standard value is used
• Mistake-proof: deleted the wrong event? Nothing fires for 10 minutes — restore it and FlashFillz quietly stands down. Rescheduled events don't trigger either
• Too-close guard: inside 2 hours of the appointment it asks you instead of acting — you know whether your customers can make the dash, a robot doesn't
• Works with your booking system: Square, Timely, Acuity, Setmore and most others sync to Google Calendar with one switch. Paper diary? The FILL text works exactly as before

💈Barbershop

Most gaps fit anyone — plain FILL is usually all you need.

Add the dash only when the gap is short and only quick services fit.

💇Hair salon

A colour gap can't take a dry cut — name the appointment type so the right customers reply.

💅Nail salon

Fast turnover, standard menu — service names help customers say yes faster.

🖋️Tattoo studio

Describe the gap — how long it is and who can actually use it. Custom work needs prep; flash doesn't.

Deposits: give FlashFillz your payment link once (Stripe, Square, PayPal, PayID — whatever you already use) and every winner's confirmation carries "Lock it in — pay your $50 deposit now" with your link. The money goes straight to you. Your booking terms ride on every confirmation too.

🦷Dentist

Appointment type is essential — a hygiene gap can't take a root canal. And patients are never texted overnight: enter tonight's cancellations at 9pm and they hear at 8am.

Practitioner loyalty: patients marked with a preferred provider only hear about that provider's gaps. Reminders carry your booking terms ("bring your Medicare card") automatically.

🩺Medical centre & allied health

Same pattern as dental: type + duration. Invites reveal nothing sensitive — just a provider, a time, and a generic appointment type.

🏋️Gym & studio

Two products, two patterns.

1:1 sessions — like any appointment:

Group classes — add x3 for the free spots. The first 3 YESes each claim one; inviting continues until the class fills, and every attendee gets their own confirmation and reminder:

Post the 2–4 classes that genuinely hurt when empty, not the whole timetable — members are protected by a daily invitation limit either way.

📈Grow the waitlist automatically

A bigger waitlist fills cancellations faster — so FlashFillz lets customers add themselves. Put a code word on a counter card, receipt, or Instagram bio, and anyone can join by text. Because they texted in, they've opted in — the cleanest consent there is.

Your card reads: "Want first dibs on last-minute openings? Text JOIN INK + your name to your FlashFillz number." Existing customers can be imported too — they start silent and are asked once, so nobody is ever messaged without saying yes.

Customers can say what they're after — anything after a dash is remembered, and when a matching slot opens they hear about it first:

Interests prioritise, never exclude: when you post FILL 27/7 10am Zoe $600 - full day sitting, the customers who asked for big work are invited first — but if they don't claim it, the waves continue through your whole list. Filling the chair always wins.

🧯Fixing mistakes

Three more commands handle real life: TAKEN (you filled the slot yourself — walk-in or phone call), CALLOFF (you need to cancel a booking — staff sick), and UNDO (posted by mistake in the last 30 minutes).

They all work the same safe way: the command alone never changes anything — FlashFillz first replies with a numbered list, and your numbered reply is the confirmation. Here's a real cancellation, start to finish:

Carla's phone, that same second: "We're sorry — your appointment with Zoe tomorrow at 9:00 AM has been cancelled. We'll text you when new appointments open up." The customer always hears it from you first, automatically.

TAKEN — a walk-in just took the slot you posted:

UNDO — you posted a slot by mistake (last 30 minutes):

The guardrails hold everywhere: a pocket-dialed command can't cancel anything, and a slot someone already booked refuses TAKEN and UNDO and points you to CALLOFF — nobody holding a confirmed booking is ever silently dropped.

👥Managing your waitlist

See who is on it, find someone, and take a repeat no-show off — all by text, no login.

Nobody is ever deleted — they are set inactive, so consent records and booking history stay intact and a mistake is one text away from being undone. LIST sarah finds someone by name or phone number.

Every feature

The complete system — everything FlashFillz does today, in production, over plain SMS.

Try it free for two weeks — on your real cancellations

Not a demo (though you can have one of those right now — text DEMO to 0468 157 012). We set everything up for you — load your waitlist, register your number, hand you the JOIN card — and you run it live, free, for two weeks. Every Monday you get one text: "Appointments recovered: 5. Revenue recovered: $640." And on day 13, your own totals with the decision in your hands. Your number, from your calendar.

The deal: if after two weeks that number isn't worth more than the subscription, don't pay us — we shake hands and part ways. If it is, pick a plan below. You're not risking money. You're risking two weeks of watching money come back.

Start my free trial →

Setup takes ~15 minutes and we do all of it. All we need is your customer list export and your mobile number.

Plans

Simple monthly tiers, sized by how busy you are. Every plan includes the full engine: campaigns, confirmations, reminders, weekly revenue reports, and the JOIN card.

Built for trust

What's happening behind every message — the rules the system enforces on itself:

• Consent first. Customers only receive invitations after opting in — imported lists start silent and are asked once; texting JOIN from a counter card is instant opt-in. STOP always works, on every message, immediately.
• Fair racing. One winner per spot, decided by reply order, immune to simultaneous replies. Group classes fill spot-by-spot the same way.
• Respectful volume. Invitations go out in priority-ordered waves — loyal customers first — and stop the instant a slot fills. No customer receives more than a few invitations a day, and nobody is ever texted overnight.
• Honest numbers. Every booking is recorded with its dollar value the moment it happens; cancellations subtract themselves. The Monday report a business receives is computed from those records, not estimated.
• Failure has a plan. Business-side cancellations apologize to every affected customer before anything else happens. Undeliverable apologies alert a human. Mistyped commands get help, not silence.
• The whole loop is auditable. Every message sent, every claim, every cancellation and every dollar is logged — per business, per customer, per campaign.