★ Booking app · cost estimate

How Much Does It Cost to Build a Booking App?

Booking looks simple until time zones, double bookings and cancellations arrive. Availability logic is the heart of the product, and it is where most of the hours go.

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1What are you building on?

Platform

Web app plus React Native app on one backend

Design

A polished component library, lightly themed.

2Who builds it?

Team

One person, low overhead, slower calendar time

Blended hourly rate

$/ hour

A starting point. Type the rate from your actual quote.

3Pick the features

Your estimate: $26,200–$56,400.

Want a second opinion? Send it to me and I'll tell you which features I'd cut to ship weeks sooner.

Send me this estimate

What people forget to budget for

Time zones

Providers and customers in different zones, plus daylight-saving changes, break naive implementations.

Calendar sync

Two-way sync with Google or Outlook calendars prevents double bookings but adds integration and conflict handling.

No-shows

Deposits, cancellation windows and reminders protect revenue and need rules plus payment logic.

How the estimate works

Each feature has a range of hours for a senior engineer building production-quality software. Those hours scale with the number of platforms, then the estimate adds what every real project needs on top of writing features.

build  = setup + design + Σ(feature hours × platform factor)
hours  = (build + 20% QA + PM overhead) × 1.15 contingency
cost   = hours × hourly rate
weeks  = hours ÷ productive hours per week

Ranges, not single numbers, because the honest answer depends on details nobody knows yet: how clean the third-party APIs are, how many design rounds you want, how often scope moves. If someone quotes a single number without asking those questions, the range is hiding in their change requests.

Building for web and mobile is not twice the work with React Native: the backend, business logic and much of the UI code are shared. That is why the platform factor for web plus mobile is about 1.5, not 2.

Worked example

Take a booking app MVP with 7 features (sign-up & login, profiles & settings, payments & subscriptions, admin panel, email & push notifications, booking & scheduling, third-party integrations (×2)), built by a senior freelancer at $60/hour:

Worked example
Line	Hours
Feature build (incl. setup and design)	293–629
QA, project management, contingency	145–311
Total	437–940

That comes to $26,200–$56,400 over roughly 15–31 weeks. Deferring admin panel alone would save about $6,670.

Hours by feature

The ranges the estimator uses, before platform factor and overhead. The features founders most often underestimate are payments, permissions and admin tooling: none of them are visible in a demo, and all of them are needed the week after launch.

Hours by feature
Feature	Covers	Hours
Sign-up & login	Email + Google/GitHub OAuth, password reset, sessions	16–32
Profiles & settings	Account page, preferences, avatar, delete account	12–24
Payments & subscriptions	Stripe/Razorpay checkout, plans, webhooks, invoices	32–64
Admin panel	Manage users, content and orders without touching the DB	32–64
Email & push notifications	Transactional email, push, in-app, preferences	16–40
Booking & scheduling	Availability, time zones, reminders, cancellations	32–72
Third-party integrations (×2)	e.g. Slack, Google Calendar, HubSpot, Zapier	24–60

Questions founders actually ask

Should I build booking or embed an existing scheduler?

Embed one (such as Cal.com) if booking is a feature. Build custom if booking is the product and the rules are specific to your industry.

Do I need a mobile app for bookings?

Customers are fine with mobile web. Providers managing schedules on the go are the usual reason to build an app.

How do I prevent double bookings?

Hold slots during checkout and enforce uniqueness in the database, not only in the UI.

How accurate is this estimate?

For a well-scoped MVP, expect the real number to land inside the range, assuming scope stays put. The bigger risk is scope creep, not the estimate: every feature added mid-build costs more than it would have up front.

Why is this higher than the agency quotes I've seen?

Teaser quotes usually exclude QA, project management, revisions and a buffer for the unknown. This estimator includes all four, so it is closer to what you will actually pay.

Do AI coding tools make an MVP cheaper?

They speed up boilerplate, tests and UI scaffolding. They do not remove product decisions, integrations, edge cases or debugging in production, which is where most of the hours in this breakdown sit.

Estimate by product type

Or start from scratch with the full MVP cost estimator.

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Fine print

Tools: on the house.
Engineer: by the hour.

Building it isn't free either, but it can be faster than you think. Send me the breakdown and I'll tell you what I'd ship first.

I'm Himanshu, an AI and full-stack engineer. I build MVPs, AI agents and the growth plumbing around them for early-stage startups.

Hire me →My projects