Quick answer
Yes — for the part of Square Appointments covered on this page, Bookslot is a one-time-purchase alternative. It costs $99 once, while Square Appointments lists from $29/mo. The Calendly you actually own — timezone-correct booking with email + ICS invites. It is not a 1:1 replacement for everything Square Appointments does — the honest limits are spelled out below.
The verdict
Switch to Bookslot if the slice of Square Appointments you actually pay for is the slice Bookslot covers — and a $99 one-time price beats from $29/mo for as long as you use it.
Stay with Square Appointments if this sounds like you — Square Appointments is fused with Square payments, no-show protection, and a POS ecosystem for salons and clinics. Bookslot takes no payments and manages no staff — it is the booking page, owned.
Head to head
| Bookslot | Square Appointments | |
|---|---|---|
| Price | $99 once | from $29/mo |
| Where it runs | Your own machine | Vendor cloud (hosted service) |
| Renewal | None — the license never expires | Recurring — access ends when you stop paying |
| 5-year cost | $99 | ~$1,740 |
About Square Appointments: Square Appointments is booking software tied to Square's payments ecosystem. It is free for individual use; Plus plans for teams list from $29/mo (about $348/yr).
Where Square Appointments still wins
Square Appointments is fused with Square payments, no-show protection, and a POS ecosystem for salons and clinics. Bookslot takes no payments and manages no staff — it is the booking page, owned.
Where Bookslot wins
If you are paying Square Appointments Plus mainly for bookable slots and reminders, Bookslot does the scheduling core — event types, availability, timezone-correct booking, email + ICS invites — self-hosted for $99 once, with no payment-platform tie-in.
- Price, permanently. $99 once versus from $29/mo for as long as you use it. There is no renewal, no seat count and no tier gate.
- Event types. Name, duration, description, color, buffers, minimum notice, max days ahead — each with its own public link.
- Weekly availability editor. Per-day time ranges in your timezone, plus one-off blocked dates and times.
The math
Square Appointments lists from $29/mo. Bookslot is $99, paid once:
- After 1 year: Bookslot has cost you $99 total — Square Appointments has cost ~$348.
- After 3 years: Bookslot is still $99 — the subscription is at ~$1,044.
- After 5 years: Bookslot is still $99 — the subscription is at ~$1,740.
Common questions
Is it really free on GitHub?
Yes — MIT source at github.com/bensblueprints/booking-page-mvp. $99 buys the packaged installer, 1-click setup, updates and priority support.
Does it sync with Google Calendar?
Not two-way — that's Calendly's strongest feature and we'll say so. Bookslot sends .ics invites your calendar ingests, and you block busy times manually. If you live across 3 synced calendars, Calendly earns its fee.
Do I need a server?
For a public booking page, yes — a $5 VPS with the included Docker setup. Desktop mode works for managing availability and bookings locally.
Is the timezone handling actually correct?
Yes — bookings are stored in UTC, availability is computed DST-safely in your timezone, displayed in the visitor's, and the math is unit-tested including DST gap days.
Try Bookslot — $99, one time
Or get Bookslot plus every other app in the suite: the OneTimeSuite bundle is currently $97, one time.