Scheduling and meetings decision
TidyCal
A competent developer can reproduce the core single-user booking + payment + calendar sync product in about a week and run it for minimal cost; advanced team features and production polish are the main reasons to keep paying.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
What a replacement has to do
- Create a shareable booking page → accept a booking and payment → put event on provider calendar(s) and generate meeting link → send confirmations/reminders → allow reschedules/cancellations.
What it still won’t have
- Polished UI/UX and production polish
- Built-in lifetime-deal distribution (AppSumo) and existing user base
- Team features (round-robin, collective pages) without extra work
- Hosted reliability, uptime guarantees, and support SLAs
- Some deep integrations and convenience features (reduced branding, custom domains, built-in SMS for US/Canada)
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 3 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a single-tenant booking web app in Node.js (Express) + React, Postgres for storage, hosted on Vercel (frontend) and a small Heroku/Render worker (backend). Implement: 1) public booking page with time-slot selection, 2) Stripe payment capture at booking time (and optional PayPal), 3) Google Calendar OAuth to read availability and create events (one writable calendar), 4) generate Google Meet links or create Zoom meetings via Zoom API, 5) transactional email confirmations and reminder emails via SendGrid, 6) simple admin UI to view bookings, reschedule/cancel, and export CSV. Out of scope: multi-user team/round-robin scheduling, billing portal, native mobile apps, SMS reminders (optional). Include error handling, input validation, unit tests for booking flows, and end-to-end test that simulates a paid booking creating a calendar event.
How we checked
How the score was reached
- Build verdict base78
- An open-source build was found+5
- 5 cited sources+3
- Price verified on pricing page+3
- Evidence score89
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 5
Every page the run actually retrieved.
- official productTidyCal homepage
- official pricingTidyCal pricing
- official pricingTidyCal pricing features
- official productTidyCal product examples
- open sourcelukevella/rallly
Integrity checks
What held up, and what did not.
