---
title: "Build an app like Calendly: a scheduling app MVP"
description: "What a booking app like Calendly needs in v1: availability, calendar sync, reminders and payment at booking, and when to integrate it instead of building."
url: https://zeroic.in/build-an-app-like-calendly
---

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# Build an app like Calendly, or the booking flow inside your product.

[Talk about your booking app](https://zeroic.in/book?service=mvp) [See the work](https://zeroic.in/work)

**Starting at**

$12,000

**Timeline**

5-6 weeks

**Products shipped**

40+

## Where most founders start

Calendly turns availability into a link: it checks connected calendars, books the slot, sends reminders and can take payment through Stripe. We've built booking into a coaching platform and a mentoring marketplace, and integrated Calendly into a client portal where it fit best.

Booking is part of a bigger product → Availability rules that match how you work

Generic tools don't fit your rules → Reminders before every session

No-shows cost you sessions → Payment taken at booking

Booking and payments live apart → A fixed-price v1, live in 5-6 weeks

## What your v1 needs first

### Booking inside a product

Coaches set their calendars, clients book 1:1 sessions and reminders go out on their own. Booking sits next to your courses and payments, not in a separate tool.

### Matching before booking

Sometimes who people book matters as much as when. We build the matching first, such as finding a mentor by university, then booking and sessions inside the platform.

### Or plug Calendly in

When booking supports a bigger product, connecting Calendly is often smarter. Bookings and payments plug into your app, so the build goes into what makes you different.

### Calendars and time zones

Real availability means syncing with Google or Outlook calendars, handling time zones and buffers, and never double-booking a slot. We get that right first.

## How it works

1. 01

### Scope the v1 (week 1)

On free calls we agree the one flow your v1 has to prove and fix scope and price before you pay. Week 1: data model and architecture.
2. 02

### Build it (weeks 2-5)

Availability, booking, reminders and payments, with working software every week. The engineer building it is the one on your calls.
3. 03

### Launch and support (week 6 on)

We ship to production, hand over the code, docs and credentials, and stay on for 6 weeks of support as the first bookings come in.

Starting at $12,000

A booking app v1 is an [MVP Sprint](https://zeroic.in/services/mvp-development): fixed scope and fixed price, agreed before the build. Sprints start at $12,000. Only need booking inside an existing product? A single integration starts at $1,000: see [API integrations](https://zeroic.in/api-integration-services).

[Talk about your booking app](https://zeroic.in/book?service=mvp)

Full outdoor activity management MVP on Bubble - bookings, participant management, inventory, Stripe. Every deliverable met acceptance criteria and shipped on schedule. Their involvement and commitment to the outcome set them apart.

Mauricio Córdova

Mauricio Córdova CTO @ Urcu

## Work we've shipped

Consumer · EdTech

### [Glibzter](https://zeroic.in/glibzter)

A coaching platform with 1:1 booking, calendar reminders and Stripe payment for coaching packages.

Consumer · EdTech

### [Gradvine](https://zeroic.in/gradvine)

Students matched 1:1 with graduates from their target universities, then booking sessions in-platform.

B2B SaaS · Client portals

### [KeepTrack](https://zeroic.in/keeptrack)

A white-label client portal where Calendly handles scheduling and Stripe takes milestone payments.

Further reading

- [Fixed-price MVP development: the scope discipline that makes it work](https://zeroic.in/blog/fixed-price-mvp-development)

## How we can help

Four ways to work with us - pick what fits, switch when it doesn’t.

From $1,000 · 1-2 weeks

### [Audits](https://zeroic.in/services/ai-audit)

Find what's broken - or whether AI is worth it - before you build.

Learn more

From $12,000 · 5-6 weeks

### [MVP Sprint](https://zeroic.in/services/mvp-development)

Zero to production in 5-6 weeks. A real product, not a prototype.

Learn more

From $4,000/mo · Recurring

### [Retainer](https://zeroic.in/services/senior-developers)

A senior engineer embedded on your team, month to month.

Learn more

From $6,000 · 2-4 weeks

### [Code Rescue](https://zeroic.in/services/code-rescue)

Vibe-coded app breaking under real users? We rebuild it to hold.

Learn more

[Compare all services](https://zeroic.in/services)

FAQ

## Frequently asked questions

How much does it cost to build an app like Calendly?

A focused v1 is an MVP Sprint, live in 5-6 weeks. Sprints start at $12,000, and we fix the final price with you upfront, based on calendar sync, payments and team scheduling. Only need it inside an existing product? A single integration starts at $1,000.

Should we build scheduling or use Calendly?

Build it if booking is your product or has rules no tool supports. If it is a side feature, we integrate Calendly, as we did for a client portal. We do both.

Can people pay when they book?

Yes. Taking payment at booking is a common way to cut no-shows. We have built Stripe payment for coaching packages right alongside the booking flow.

Do we own the code?

Yes, 100%. You own the code, infrastructure, docs and credentials.

## Hear from us within 24 hours.

**Prashant and Khushi** Partners @ Zeroic

Building a booking product? Tell us who books whom and what rules apply. We'll tell you whether to build it or integrate it.

Rather talk it through? [Book a 30-minute call](https://zeroic.in/book?service=mvp)

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