Online Booking & Scheduling for Salons and Barbershops
A scheduling system that prevents double-bookings at the database level and lets clients book in seconds.
Last updated: April 13, 2026
SHIFT's scheduling engine handles online bookings, walk-ins, recurring appointments, and multi-provider calendars in a single system. Double-bookings are prevented by PostgreSQL exclusion constraints at the database level, not application-level checks that can fail under concurrent load.
Clients book through a branded public page without creating an account. The 10-minute hold system reserves the slot while they complete payment. Providers see day, week, and month calendar views with drag-and-drop rescheduling and real-time availability updates.
Walk-in management uses kiosk mode on any iPad or tablet. Clients check in, see estimated wait times, and get notified when their turn arrives. The queue integrates directly with the appointment calendar so providers see their full day in one view.
What's included
- ✓Day, week, and month calendar views with drag-and-drop rescheduling
- ✓Real-time online booking with 10-minute hold system
- ✓Walk-in queue with kiosk mode and wait time estimates
- ✓Recurring appointments following the RFC 5545 standard
- ✓Waitlist with cascading auto-claims on cancellations
- ✓Database-enforced double-booking prevention (PostgreSQL exclusion constraints)
- ✓Multi-provider scheduling with individual availability windows
- ✓Automated SMS and email appointment reminders
- ✓Guest booking — no client account required
- ✓Group booking for multi-person appointments
How does SHIFT prevent double-bookings?
SHIFT uses PostgreSQL exclusion constraints to make overlapping appointments structurally impossible for the same provider. This is a physical database constraint, not an application-level check. Even if two clients click "Book" at the exact same millisecond, only one appointment will be created.
Most scheduling platforms check for conflicts in application code before inserting the booking. Under heavy concurrent load, this creates a race condition where two bookings can slip through simultaneously. SHIFT eliminates this entirely by enforcing the constraint at the database layer where atomicity is guaranteed.
How does the walk-in queue work?
Any iPad, tablet, or phone can serve as a kiosk. Clients scan a QR code or tap to join the queue, selecting their preferred service and provider. The system calculates estimated wait times based on current appointments and average service durations.
Providers see walk-in clients alongside scheduled appointments in a unified view. When a slot opens, the next walk-in is automatically suggested. Clients receive an SMS notification when their turn is approaching, so they can step out without losing their place.
What booking features do clients see?
Clients access a branded booking page via direct link, website embed, or social media bio link. They select a service, choose a provider (or accept the next available), pick a time slot, and optionally pay a deposit — all without creating an account.
Returning clients see smart defaults: their last provider, most-booked service, and preferred time window are pre-filled. One-click rebooking makes repeat visits effortless. Add-on services can be suggested during the booking flow to increase average ticket value.
Frequently asked questions
Yes. SHIFT supports guest booking. Clients book and pay without creating an account or downloading an app. Identity is captured at confirmation (name and email) but no account wall blocks the booking flow.
Recurring appointments follow the RFC 5545 standard — the same spec behind Google Calendar and Outlook. This supports complex patterns like every 2 weeks, first Monday of each month, or custom intervals with exception dates.
Yes. Automated SMS and email reminders are sent at configurable intervals before each appointment. Most businesses use 24-hour and 1-hour reminders. Clients can confirm or cancel directly from the reminder.
Yes. Walk-in queue entries and online bookings appear in the same calendar view. Providers see their complete schedule — both pre-booked appointments and walk-in clients — without switching between systems.
Yes. Each provider gets individual availability windows, service menus, and calendar views. Clients can book with a specific provider or choose "next available" to be routed to whoever has an open slot first.
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