Slotly — Appointment & Booking System (PHP + MySQL, Self-Hosted)
Self-hosted appointment booking engineered so it can't double-book.
The problem it solves
Salons, spas, trainers, and clinics-of-one need staff and services booked without double-bookings, timezone bugs, or ignored buffers — the exact places cheap booking scripts fall apart. Hosted booking SaaS also charges a monthly fee forever and keeps the client list on someone else's server.
- Double-bookings and timezone/DST bugs in cheap scripts
- Buffers, blackout dates, and split shifts that aren't enforced
- Recurring SaaS fees for a booking widget you could own outright
What you get
Conflict-free booking engine
Double-booking is prevented at the database level, even when two customers hit the same slot at the same instant.
Timezone & DST correct
Customers see their own timezone while you work in yours, and impossible DST-gap times are never offered.
Buffers, blackouts & split shifts
Prep/cleanup buffers, blackout dates, minimum notice, booking windows, and per-weekday hours including split shifts.
Group classes with capacity
Set a capacity so multiple people can book the same slot, never one more.
Deposits, coupons & reminders
Per-service deposits, coupon codes, tax, and automatic email reminders via one cron line.
Admin calendar & reports
Colour-coded week calendar, appointment statuses, walk-in bookings, and reports by service and staff.
Pricing — one-time, yours forever
Available soon — get notified
Checkout isn't open yet. Leave your email and we'll send one note the moment Slotly — Appointment & Booking System (PHP + MySQL, Self-Hosted) can be purchased — nothing else.
Screenshots
Honest limitations
- No online payment collection at booking — deposits are quoted and tracked in admin, not processed as cards
- Not built for a multi-vendor marketplace
- Single business per install
2-minute web installer, plain PHP 8 + MySQL (or SQLite for a trial), no Composer or build step — Docker image included.
Frequently asked questions
Does it take payment online?
No — deposits are quoted and tracked in admin; online payment gateways are roadmap.
What do automatic reminders need?
One cron line enables them; email goes through SMTP or PHP mail().
Can I run group classes?
Yes — set a capacity and multiple people can book the same slot.
MySQL or SQLite?
Either — MySQL for shared hosting, SQLite for a local trial.
What do I need to run it?
PHP 8.0+ with PDO and MySQL/MariaDB or SQLite, on any Apache/LiteSpeed shared host (mod_rewrite) or Nginx/VPS.
See it running before you buy
The live demo is being prepared — check back shortly.
Demo — coming soon